Solved papers for NEET AIPMT SOLVED PAPER SCREENING 2004

done AIPMT SOLVED PAPER SCREENING 2004 Total Questions - 200

• question_answer1) If \[{{\lambda }_{m}}\]denotes the wavelength at which the radiative emission from a black body at a temperature T K is maximum, then:                                                                                                                                      
  A)
  \[{{\lambda }_{m}}\,\propto \,\,{{T}^{4}}\]                                                                 
  done clear
  B)
  \[{{\lambda }_{m}}\]is independent of T      
  done clear
  C)
  \[{{\lambda }_{m}}\propto \,\,T\]                                                                   
  done clear
  D)
  \[{{\lambda }_{m}}\propto \,\,{{T}^{-1}}\]
  done clear
  View Answer play_arrow

• question_answer2) The ratio of the radii of gyration of a circular disc about a tangential axis in the plane of the disc and of a circular ring of the same radius about a tangential axis in the plane of the ring is:                       
  A)
  2 : 3
  done clear
  B)
      2 : 1                               
  done clear
  C)
  \[\sqrt{5}:\sqrt{6}\]               
  done clear
  D)
  1 : \[\sqrt{2}\]
  done clear
  View Answer play_arrow

• question_answer3) A round disc of moment of inertia \[{{I}_{2}}\]about its axis perpendicular to its plane and passing through its centre is placed over another disc of moment of inertia \[{{I}_{1}}\]rotating with an angular velocity \[\omega \] about the same axis. The final angular velocity of the combination of discs is:                                                            
  A)
  \[\frac{{{I}_{2}}\omega }{{{I}_{1}}+{{I}_{2}}}\]
  done clear
  B)
                                 \[\omega \]                               
  done clear
  C)
  \[\frac{{{I}_{1}}\omega }{{{I}_{1}}+{{I}_{2}}}\]           
  done clear
  D)
  \[\frac{({{I}_{1}}+{{I}_{2}})\,\omega }{{{I}_{1}}}\]
  done clear
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• question_answer4)                A ball of mass 2 kg and another of mass 4 kg are dropped together from a 60 feet tall building. After a fall of 30 feet each towards earth, their respective kinetic energies will be in the ratio of:            
  A)
  \[\sqrt{2}:1\]
  done clear
  B)
                 1 : 4                               
  done clear
  C)
  1 : 2             
  done clear
  D)
  \[1:\sqrt{2}\]
  done clear
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• question_answer5) An electric dipole has the magnitude of its charge as q and its dipole moment is p. It is placed in a uniform electric field E. If its dipole moment is along the direction of the field, the force on it and its potential energy are respectively:                                                                                                                                      
  A)
  2qE and minimum   
  done clear
  B)
  qE and pE                   
  done clear
  C)
  zero and minimum 
  done clear
  D)
  qE and maximum
  done clear
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• question_answer6) A coil of 40 H inductance is connected in series with a resistance of 8 ohm and the combination is joined to the terminals of a 2 V battery. The time constant of the circuit is:                                     
  A)
  5 s   
  done clear
  B)
                1/5 s             
  done clear
  C)
  40 s               
  done clear
  D)
  20 s
  done clear
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• question_answer7) One mole of an ideal gas at an initial temperature of T K does 6R joules of work adiabatically. If the ratio of specific heats of this gas at constant pressure and at constant volume is 5/3, the final temperature of gas will be:
  A)
                                                                                                                                                                  (T + 2.4) K   
  done clear
  B)
                 (T - 2.4) K                    
  done clear
  C)
  (T + 4) K                       
  done clear
  D)
  (T - 4) K
  done clear
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• question_answer8) A battery is charged at a potential of 15 V for 8 H when the current flowing is 10 A. The battery on discharge supplies a current of 5 A for 15 H. The mean terminal voltage during discharge is 14 V. The ?watt-hour? efficiency of the battery is:                                                                                                                 
  A)
  82.5%    
  done clear
  B)
    80%                                               
  done clear
  C)
  90%          
  done clear
  D)
  87.5%
  done clear
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• question_answer9) The electric resistance of a certain wire of iron is R. If its length and radius are both doubled, then:
  A)
                                                                                                                                                                  the resistance will be doubled and the specific resistance will be halved
  done clear
  B)
                 the resistance will be halved and the specific resistance will remain unchanged
  done clear
  C)
  the resistance will be halved and the specific resistance will be doubled
  done clear
  D)
  the resistance and the specific resistance, will both remain unchanged
  done clear
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• question_answer10) A galvanometer acting as a voltmeter will have:                                                                                        
  A)
  a high resistance in parallel with its coil          
  done clear
  B)
  a high resistance in series with its coil
  done clear
  C)
  a low resistance in parallel with its coil           
  done clear
  D)
  a low resistance in series with its coil
  done clear
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• question_answer11) When three identical bulbs of 60 W, 200 V rating are connected in series to a 200 V supply, the power drawn by them will be:                                                                                                                                                         
  A)
  60 W                
  done clear
  B)
  180 W           
  done clear
  C)
  10 W       
  done clear
  D)
  20 W
  done clear
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• question_answer12) Resistances n, each, of r ohm, when connected in parallel give an equivalent resistance of R ohm. If these resistances were connected in series, the combination would have a resistance in ohms, equal to:
  A)
  \[{{n}^{2}}R\].                                                                      
  done clear
  B)
  \[R/{{n}^{2}}\]                                                                      
  done clear
  C)
  R/n                
  done clear
  D)
  nR
  done clear
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• question_answer13) The unit of permittivity of free space, \[{{\varepsilon }_{0}}\],is:                                                                              
  A)
  coulomb/newton-metre                     
  done clear
  B)
  newton - metre2/coulomb2
  done clear
  C)
  coulomb / newton ? metre                
  done clear
  D)
  coulomb2/ (newton- metre)2
  done clear
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• question_answer14) Five equal resistances each of resistance R are connected as shown in the figure. A battery of V volts is connected between A and B. The current flowing in AFCEB will be:                                  
  A)
  \[\frac{3V}{R}\]                       
  done clear
  B)
  \[\frac{V}{R}\]                          
  done clear
  C)
  \[\frac{V}{2R}\]       
  done clear
  D)
  \[\frac{2V}{R}\]
  done clear
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• question_answer15) A galvanometer of \[50\,\Omega \] resistance has 25 divisions. A current of \[4\times {{10}^{-4}}\,A\] gives a deflection of one division. To convert this galvanometer into a voltmeter having a range of 25 V, it should be connected with a resistance of:                                                                                                                                                 
  A)
  \[2500\,\Omega \] as a shunt            
  done clear
  B)
  \[245\,\,\Omega \]  as shunt             
  done clear
  C)
  \[2550\,\,\Omega \]  in series           
  done clear
  D)
  \[2450\,\,\Omega \] in series
  done clear
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• question_answer16) A 6 V battery is connected to the terminals of a three metre long wire of uniform thickness and resistance of \[100\,\,\Omega \]. The difference of potential between two points on the wire separated by a distance or 50 cm will be:
  A)
                                                                                                                                                                  2 V                 
  done clear
  B)
  3 V                 
  done clear
  C)
  1 V       
  done clear
  D)
  1.5 V
  done clear
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• question_answer17) According to Einstein's photoelectric equation, the graph between the kinetic energy of photoelectrons ejected and the frequency of incident radiation is:                                                                  
  A)
      
  done clear
  B)
         
  done clear
  C)
   
  done clear
  D)
  
  done clear
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• question_answer18) A nucleus represented by the symbol \[_{Z}^{A}X\]has:                                                                                      
  A)
  Z neutrons and A -Z protons                                              
  done clear
  B)
  Z protons and A-Z neutrons
  done clear
  C)
  Z protons and A neutrons                   
  done clear
  D)
  A protons and Z-A neutrons
  done clear
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• question_answer19) The dimensions of universal gravitational constant are:                                                                         
  A)
  \[[{{M}^{-1}}\,{{L}^{3}}\,{{T}^{-2}}]\]             
  done clear
  B)
  \[[M{{L}^{2}}\,{{T}^{-1}}]\] 
  done clear
  C)
  \[[{{M}^{-2}}\,{{L}^{3}}\,{{T}^{-2}}]\]                             
  done clear
  D)
  \[[{{M}^{-2}}\,{{L}^{2}}\,{{T}^{-1}}]\]
  done clear
  View Answer play_arrow

• question_answer20) If in a nuclear fusion process, the masses of the fusing nuclei be \[{{m}_{1}}\] and \[{{m}_{2}}\] and the mass of the resultant nucleus be \[{{m}_{3}},\] then:                                                                                                                                    
  A)
  \[{{m}_{3}}={{m}_{1}}+{{m}_{2}}\] 
  done clear
  B)
  \[{{m}_{3}}=|{{m}_{1}}-{{m}_{2}}|\]              
  done clear
  C)
  \[{{m}_{3}}<({{m}_{1}}+{{m}_{2}})\]
  done clear
  D)
  \[{{m}_{3}}>({{m}_{1}}+{{m}_{2}})\]
  done clear
  View Answer play_arrow

• question_answer21) In semiconductors at a room temperature:                                                                                 
  A)
  the valence band is partially empty and the conduction band is partially filled
  done clear
  B)
  the valence band is completely filled and the conduction band is partially filled
  done clear
  C)
  the valence band is completely filled
  done clear
  D)
  the conduction band is completely empty
  done clear
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• question_answer22) The peak voltage in the output of a half-wave diode rectifier fed with a sinusoidal signal without filter is 10V. The DC component of the output voltage is:                                                                                    
  A)
  \[10/\sqrt{2}\,\text{V}\]     
  done clear
  B)
  \[10/\pi \,\,\text{V}\]
  done clear
  C)
  \[-10\,\,\text{V}\]  
  done clear
  D)
  \[20/\pi \,\,\text{V}\]
  done clear
  View Answer play_arrow

• question_answer23) A mass of 0.5 kg moving with a speed of 1.5 m/son a horizontal smooth surface, collides with a nearly weightless spring of force constant\[\text{k}=\text{5}0\text{ N}/\text{m}.\]The maximum compression of the spring would be:
  A)
  0.15m  
  done clear
  B)
  0.12m           
  done clear
  C)
  1.5m       
  done clear
  D)
  0.5m
  done clear
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• question_answer24) The output of OR gate is 1:                                                                                                                 
  A)
  only if both inputs are zero                 
  done clear
  B)
  if either or both inputs are 1
  done clear
  C)
  only if both inputs are 1                       
  done clear
  D)
  if either input is zero
  done clear
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• question_answer25) In a p-n junction photo cell, the value of the photo-electromotive force produced by monochromatic light is proportional to:                                                                                                                   
  A)
  the barrier voltage at the p-n junction           
  done clear
  B)
  the intensity of the light falling on the cell
  done clear
  C)
  the frequency of the light falling on the cell
  done clear
  D)
  the voltage applied at the p-n junction
  done clear
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• question_answer26) The Bohr model of atoms:
  A)
  assumes that the angular momentum of electrons is quantized
  done clear
  B)
  uses Einstein's photoelectric equation
  done clear
  C)
  predicts continuous emission spectra for atoms
  done clear
  D)
  predicts the same emission spectra for all types of atoms
  done clear
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• question_answer27) The coefficient of static friction, \[{{\mu }_{s}}\]between block A of mass 2 kg and the table as shown in the figure, is 0.2. What would be the maximum mass value of block B so that the two blocks do not move? The string and the pulley are assumed to be smooth and mass less: \[\left( \text{g}=\text{1}0\text{ m}/{{\text{s}}^{\text{2}}} \right)\]                 
  A)
  2.0kg            
  done clear
  B)
  4.0kg            
  done clear
  C)
  0.2kg    
  done clear
  D)
  0.4kg
  done clear
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• question_answer28) Which one of the following statements is true for the speed v and the acceleration a of a particle executing simple harmonic motion?                                                                                                                    
  A)
  When v is maximum, a is maximum                
  done clear
  B)
  Value of a is zero, whatever may be the value of v
  done clear
  C)
  When v is zero, a is zero                                      
  done clear
  D)
  When v is maximum, a is zero
  done clear
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• question_answer29) Two springs of spring constants \[{{k}_{1}}\]and \[{{k}_{2}}\] are joined in series. The effective spring constant of the combination is given by :                                                                                                                     
  A)
  \[\sqrt{{{k}_{1}}{{k}_{2}}}\]
  done clear
  B)
  \[({{k}_{1}}+{{k}_{2}})/2\]   
  done clear
  C)
  \[{{k}_{1}}+{{k}_{2}}\]          
  done clear
  D)
  \[{{k}_{1}}{{k}_{2}}/({{k}_{1}}+{{k}_{2}})\]
  done clear
  View Answer play_arrow

• question_answer30) Of the diodes shown in the following diagrams, which one is reverse biased?                             
  A)
  
  done clear
  B)
  
  done clear
  C)
  
  done clear
  D)
  
  done clear
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• question_answer31) A wheel having moment of inertia \[\text{2 kg}-{{\text{m}}^{\text{2}}}\]about its vertical axis, rotates at the rate of 60rpm about this axis. The torque which can stop the wheel's rotation in one minute would be:                       
  A)
  \[\frac{2\pi }{15}\text{N-m}\]           
  done clear
  B)
  \[\frac{\pi }{12}\text{N-m}\]             
  done clear
  C)
  \[\frac{\pi }{15}\text{N-m}\]
  done clear
  D)
  \[\frac{\pi }{18}\text{N-m}\]
  done clear
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• question_answer32) Consider a system of two particles having masses \[{{m}_{1}}\] and\[{{m}_{2}}\]. If the particle of mass \[{{m}_{1}}\] is pushed towards the mass centre of particles through a distance d, by what distance would the particle of mass \[{{m}_{2}}\] move so as to keep the mass centre of particles at the original position?       
  A)
                                  \[\frac{{{m}_{1}}}{{{m}_{1}}+{{m}_{2}}}d\] 
  done clear
  B)
  \[\frac{{{m}_{1}}}{{{m}_{2}}}d\]       
  done clear
  C)
  \[d\]             
  done clear
  D)
  \[\frac{{{m}_{2}}}{{{m}_{1}}}d\]
  done clear
  View Answer play_arrow

• question_answer33) If\[|\overset{\to }{\mathop{A}}\,\,\,\,\times \overset{\to }{\mathop{B}}\,|\,=\sqrt{3}\overset{\to }{\mathop{A\,}}\,.\overset{\to }{\mathop{B\,}}\,\], then the value of\[\left| \text{A}+\text{B} \right|\]is :
  A)
                                                                  \[{{({{A}^{2}}+{{B}^{2}}+AB)}^{1/2}}\]
  done clear
  B)
  \[{{\left( {{A}^{2}}+{{B}^{2}}+\frac{AB}{\sqrt{3}} \right)}^{1/2}}\]
  done clear
  C)
  \[A+B\]       
  done clear
  D)
  \[{{({{A}^{2}}+{{B}^{2}}+\sqrt{3}AB)}^{1/2}}\]
  done clear
  View Answer play_arrow

• question_answer34) A car is moving towards a high cliff. The car driver sounds a horn of frequency \[f\]. The reflected sound heard by the driver has a frequency \[2f\]. If\[v\] be the velocity of sound, then the velocity of the car, in the same velocity units, will be:        
  A)
                                                                                                                  \[\frac{v}{\sqrt{2}}\]                             
  done clear
  B)
  \[\frac{v}{3}\]
  done clear
  C)
  \[\frac{v}{4}\]                           
  done clear
  D)
  \[\frac{v}{2}\]
  done clear
  View Answer play_arrow

• question_answer35) A beam of light composed of red and green rays is incident obliquely at a point on the face of a rectangular glass slab. When coming out on the opposite parallel face, the red and green rays emerge from:
  A)
                                                                                                                                  two points propagating in two different on-parallel directions
  done clear
  B)
  two points propagating in two different parallel directions
  done clear
  C)
  one point propagating in two different directions
  done clear
  D)
  one point propagating in the same direction
  done clear
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• question_answer36) The density of newly discovered planet is twice that of earth. The acceleration due to gravity at the surface of the planet is equal to that at the surface of the earth. If the radius of the earth is\[R\], the radius of the planet would be:                                                                                                                                     
  A)
  \[2R\]                           
  done clear
  B)
  \[4R\]                           
  done clear
  C)
  \[\frac{1}{4}R\]                        
  done clear
  D)
  \[\frac{1}{2}R\]
  done clear
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• question_answer37) The refractive index of the material of a prism is \[\sqrt{2}\] and its refracting angle is \[{{30}^{\text{o}}}\]. One of the refracting surfaces of the prism is made a mirror inwards. A beam of monochromatic light entering the prism from the other face will retrace its path after reflection from the mirrored surface if its angle of incidence on the prism is:                                                                                                                                          
  A)
  \[{{45}^{\text{o}}}\]   
  done clear
  B)
  \[{{60}^{\text{o}}}\]                              
  done clear
  C)
  \[{{0}^{\text{o}}}\]        
  done clear
  D)
  \[{{30}^{\text{o}}}\]
  done clear
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• question_answer38) A stone is tied to a string of length \[l\]and is whirled in a vertical circle with the other end of the string as the centre. At a certain instant of time, the stone is at its lowest position and has a speed \[u\]. The magnitude of the change in velocity as it reaches a position where the string is horizontal {g being acceleration due to gravity) is:                                                                                                                                                  
  A)
  \[\sqrt{2({{u}^{2}}-gl)}\]      
  done clear
  B)
  \[\sqrt{{{u}^{2}}-gl}\]            
  done clear
  C)
  \[u-\sqrt{{{u}^{2}}-2gl}\]     
  done clear
  D)
  \[\sqrt{2gl}\]
  done clear
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• question_answer39) A particle of mass \[{{m}_{1}}\] is moving with a velocity\[{{v}_{1}}\]and another particle of mass \[{{m}_{2}}\]is moving with a velocity \[{{v}_{2}}\]Both of them have the same momentum but their different kinetic energies are \[{{E}_{1}}\] and \[{{E}_{2}}\] respectively. If \[{{m}_{1}}>{{m}_{2}}\]then:                                                                                                                                                       
  A)
  \[{{E}_{1}}<{{E}_{2}}\]          
  done clear
  B)
  \[\frac{{{E}_{1}}}{{{E}_{2}}}=\frac{{{m}_{1}}}{{{m}_{2}}}\]    
  done clear
  C)
  \[{{E}_{1}}>{{E}_{2}}\]          
  done clear
  D)
  \[{{E}_{1}}={{E}_{2}}\]          
  done clear
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• question_answer40) A bullet of mass 2g is having a charge of 2\[\mu C\].Through what potential difference must it be accelerated, starting from rest, to acquire a speed of 10 m/s?                                                                            
  A)
  5 kV          
  done clear
  B)
  50 kV            
  done clear
  C)
  5 V           
  done clear
  D)
  50 V
  done clear
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• question_answer41) In India electricity is supplied for domestic use at 220 V. It is supplied at 110 V in USA. If the resistance of a 60 W bulb for use in India is R, the resistance of a 60 W bulb for use in USA will be:   
  A)
  \[R\]                             
  done clear
  B)
  \[2R\]                           
  done clear
  C)
  \[\frac{R}{4}\]          
  done clear
  D)
  \[\frac{R}{2}\]
  done clear
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• question_answer42) The magnetic flux through a circuit of resistance \[R\] changes by an amount \[\Delta \phi \]in a time\[\Delta t\]. Then the total quantity of electric charge Q that passes any point in the circuit during the time \[\Delta t\]is represented by :
  A)
                                                                                                                                                  \[Q=\frac{1}{R},\frac{\Delta \phi }{\Delta t}\]            
  done clear
  B)
  \[Q=\frac{\Delta \phi }{R}\]
  done clear
  C)
  \[Q=\frac{\Delta \phi }{\Delta t}\]   
  done clear
  D)
  \[Q=R\,\,.\frac{\Delta \phi }{\Delta t}\]
  done clear
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• question_answer43) The equation of state for 5g of oxygen at a pressure P and temperature T, when occupying a volume V, will be:                                                                                                                                                                         
  A)
  \[PV=(3/32)RT\]
  done clear
  B)
  \[PV=5RT\]                
  done clear
  C)
  \[PV=(5/2)RT\]        
  done clear
  D)
  \[PV=(5/16)RT\]
  done clear
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• question_answer44) The half-life of radium is about 1600 years. Of 100 g of radium existing now, 25 g will remain unchanged after:                                                                                                                                                                            
  A)
  4800 year 
  done clear
  B)
  6400 year                    
  done clear
  C)
  2400 year     
  done clear
  D)
  3200 year
  done clear
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• question_answer45) \[{{M}_{p}}\]denotes the mass of a proton and \[{{M}_{n}}\]that of a neutron. A given nucleus, of binding energy B, contains Z protons and N neutrons.                                                                                                                    The mass M(N, Z) of the nucleus is given by :
  A)
  \[\text{M}\left( \text{N},\text{ Z} \right)=\text{N}{{\text{M}}_{\text{n}}}+\text{Z}{{\text{M}}_{\text{p}}}-\text{B}{{\text{e}}^{\text{2}}}\]                       
  done clear
  B)
  \[\text{M}\left( \text{N},\text{Z} \right)=\text{N}{{\text{M}}_{\text{n}}}+\text{Z}{{\text{M}}_{\text{p}}}+\text{B/}{{\text{c}}^{\text{2}}}\]
  done clear
  C)
  \[\text{M}\left( \text{N},\text{ Z} \right)=\text{N}{{\text{M}}_{\text{n}}}+\text{Z}{{\text{M}}_{\text{p}}}-\text{B}/{{\text{c}}^{\text{2}}}\]
  done clear
  D)
  \[\text{M}\left( \text{N},\text{ Z} \right)=\text{N}{{\text{M}}_{\text{n}}}+\text{Z}{{\text{M}}_{\text{p}}}+\text{B}/{{\text{c}}^{\text{2}}}\]
  done clear
  View Answer play_arrow

• question_answer46) The phase difference between two waves, represented by                                                                \[{{y}_{1}}={{10}^{-6}}\sin [100t+(x/50)+0.5]\,m\] \[{{y}_{2}}={{10}^{-6}}\cos [100t+(x/50)]\,m\] where x is expressed in metres and t is expressed in seconds, is approximately:
  A)
  1.07 rad  
  done clear
  B)
  2.07 rad       
  done clear
  C)
  0.5 rad   
  done clear
  D)
  1.5 rad
  done clear
  View Answer play_arrow

• question_answer47) A telescope has an objective lens of 10 cm diameter and is situated at a distance of one kilometre from two objects. The minimum distance between these two objects, which can be resolved by the telescope, when the mean wavelength of light is \[5000\overset{\text{o}}{\mathop{\text{A}}}\,,\], of the order of:                                                                       
  A)
  0.5m       
  done clear
  B)
  5m                                 
  done clear
  C)
  5 mm      
  done clear
  D)
  5 cm
  done clear
  View Answer play_arrow

• question_answer48) A block of mass m is placed on a smooth wedge of inclination \[\theta \]. The whole system is accelerated horizontally so that the block does not slip on the wedge. The force exerted by the wedge on the block (g is acceleration due to gravity) will be:                                                                                                            
  A)
  \[mg\,\cos \theta \]              
  done clear
  B)
  \[mg\sin \theta \]   
  done clear
  C)
  \[mg\]         
  done clear
  D)
  \[mg/\cos \theta \]
  done clear
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• question_answer49) Three particles, each of mass m grams situated at the vertices of an equilateral triangle ABC of side I cm (as shown in the figure). The moment of inertia of the system about a line AX perpendicular to AB and in the plane of ABC, in gram-\[\text{c}{{\text{m}}^{\text{2}}}\] units will be:                                                                                                                                                               
  A)
  \[(3/4)m{{l}^{2}}\]                  
  done clear
  B)
  \[2\,m{{l}^{2}}\]                      
  done clear
  C)
  \[(5/4)\,\,m{{l}^{2}}\]
  done clear
  D)
  \[(3/2)\,\,m{{l}^{2}}\]
  done clear
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• question_answer50) Energy E of a hydrogen atom with principal quantum number n is given by \[E=\frac{-13.6}{{{n}^{2}}}eV.\]The energy of a photon ejected when the electron jumps from \[n=3\]state to \[n=2\] state of hydrogen, is approximately:
  A)
                                                                                                                                                                  1.5eV           
  done clear
  B)
  0.85 eV        
  done clear
  C)
  3.4 eV     
  done clear
  D)
  1.9 eV
  done clear
  View Answer play_arrow

• question_answer51) Among the following, the pair in which the two species are not isostructural, is:        
  A)
  \[Si{{F}_{4}}\]and\[S{{F}_{4}}\]        
  done clear
  B)
  \[IO_{3}^{-}\]and\[Xe{{O}_{3}}\]    
  done clear
  C)
  \[\text{B}{{\text{H}}_{\text{4}}}\]and\[\text{NH}_{4}^{+}\]              
  done clear
  D)
  \[\text{PF}_{6}^{-}\]and\[\text{SF}_{6}^{{}}\]
  done clear
  View Answer play_arrow

• question_answer52) The rate of first order reaction is \[\text{1}.\text{5}\times \text{1}{{0}^{-\text{2}}}\]\[\text{mol}{{\text{L}}^{-1}}\]\[\text{mi}{{\text{n}}^{-\text{1}}}\] at 0.5 M concentration of the reactant. The half-life of the reaction is:                                                                                                                                       
  A)
  0.383mm                    
  done clear
  B)
  23.1mm
  done clear
  C)
  8.73mm                                       
  done clear
  D)
  7.53mm
  done clear
  View Answer play_arrow

• question_answer53) Which of the following is responsible for depletion of the ozone layer in the upper strata of the atmosphere?
  A)
  Polyhalogens            
  done clear
  B)
  Ferrocenes                
  done clear
  C)
  Fullerenes                  
  done clear
  D)
  Freons
  done clear
  View Answer play_arrow

• question_answer54) Which one of the following structures represents the peptide chain?                                            
  A)
  \[-\overset{\begin{smallmatrix} H \\ | \end{smallmatrix}}{\mathop{N}}\,-\underset{\begin{smallmatrix} || \\ O \end{smallmatrix}}{\mathop{C}}\,-\underset{\begin{smallmatrix} | \\ H \end{smallmatrix}}{\mathop{N}}\,-\underset{|}{\overset{|}{\mathop{C}}}\,-NH-\overset{\begin{smallmatrix} \\ || \end{smallmatrix}}{\mathop{C}}\,-NH-\]
  done clear
  B)
  \[-\overset{\begin{smallmatrix} H \\ | \end{smallmatrix}}{\mathop{N}}\,-\underset{\begin{smallmatrix} || \\ O \end{smallmatrix}}{\mathop{C}}\,-\underset{|}{\overset{|}{\mathop{C}}}\,-\underset{|}{\overset{|}{\mathop{C}}}\,-\underset{|}{\overset{|}{\mathop{C}}}\,-\overset{\begin{smallmatrix} H \\ | \end{smallmatrix}}{\mathop{N}}\,-\underset{|}{\overset{|}{\mathop{C}}}\,-\underset{|}{\overset{|}{\mathop{C}}}\,-\underset{|}{\overset{|}{\mathop{C}}}\,\]
  done clear
  C)
  \[-\overset{\begin{smallmatrix} H \\ | \end{smallmatrix}}{\mathop{N}}\,-\underset{|}{\overset{|}{\mathop{C}}}\,-\underset{\begin{smallmatrix} || \\ O \end{smallmatrix}}{\mathop{C}}\,-\overset{\begin{smallmatrix} H \\ | \end{smallmatrix}}{\mathop{N}}\,-\underset{|}{\overset{|}{\mathop{C}}}\,-\underset{\begin{smallmatrix} || \\ O \end{smallmatrix}}{\mathop{C}}\,-\overset{\begin{smallmatrix} H \\ | \end{smallmatrix}}{\mathop{N}}\,-\underset{|}{\overset{|}{\mathop{C}}}\,-\underset{\begin{smallmatrix} || \\ O \end{smallmatrix}}{\mathop{C}}\,-\overset{\begin{smallmatrix} H \\ | \end{smallmatrix}}{\mathop{N}}\,-\underset{|}{\overset{|}{\mathop{C}}}\,-\]
  done clear
  D)
  \[-\underset{|}{\overset{|}{\mathop{C}}}\,-\overset{\begin{smallmatrix} H \\ | \end{smallmatrix}}{\mathop{N}}\,-\underset{|}{\overset{|}{\mathop{C}}}\,-\underset{|}{\overset{|}{\mathop{C}}}\,-\overset{\begin{smallmatrix} \\ || \end{smallmatrix}}{\mathop{C}}\,-\underset{\begin{smallmatrix} | \\ H \end{smallmatrix}}{\mathop{N}}\,-\underset{|}{\overset{|}{\mathop{C}}}\,-\underset{|}{\overset{|}{\mathop{C}}}\,-\overset{\begin{smallmatrix} H \\ | \end{smallmatrix}}{\mathop{N}}\,-\underset{\begin{smallmatrix} || \\ O \end{smallmatrix}}{\mathop{C}}\,-\underset{|}{\overset{|}{\mathop{C}}}\,-\underset{|}{\overset{|}{\mathop{C}}}\,-\]
  done clear
  View Answer play_arrow

• question_answer55)                Which one of the following can be oxidised to the corresponding carbonyl compound?         
  A)
  2-hydroxy-propane
  done clear
  B)
  ortho-nitro ?phenol              
  done clear
  C)
  Phenol                         
  done clear
  D)
  2-methyl-2-hydroxy-propane
  done clear
  View Answer play_arrow

• question_answer56) The\[-OH\]group of an alcohol or the \[-COOH\]group of a carboxylic acid can be replaced by\[-Cl\]using:
  A)
  phosphorus pentachloride
  done clear
  B)
  hypochlorous acid
  done clear
  C)
  chlorine
  done clear
  D)
  hydrochloric acid
  done clear
  View Answer play_arrow

• question_answer57) Reaction of HBr with propene in the presence of peroxide gives:                                                     
  A)
  isopropyl bromide
  done clear
  B)
  3-bromo propane
  done clear
  C)
  allyl bromide             
  done clear
  D)
  n-propyl bromide
  done clear
  View Answer play_arrow

• question_answer58) Which is the best description of behaviour of bromine in the reaction given below? \[{{H}_{2}}O+B{{r}_{2}}\xrightarrow[{}]{{}}HBr+HOBr\]
  A)
  Proton accepted only
  done clear
  B)
  Both oxidised and reduced
  done clear
  C)
  Oxidised only
  done clear
  D)
  Reduced only
  done clear
  View Answer play_arrow

• question_answer59) In a regular octahedral molecule, \[M{{X}_{6}}\]the number of \[X-M-X\]bonds at 180° is:   
  A)
  three            
  done clear
  B)
  two                                               
  done clear
  C)
  six                                  
  done clear
  D)
  four
  done clear
  View Answer play_arrow

• question_answer60) Chloropicrin is obtained by be reaction of:                                                                                   
  A)
  steam on carbon tetrachloride
  done clear
  B)
  nitric acid on chlorobenzene
  done clear
  C)
  chlorine on picric acid
  done clear
  D)
  nitric acid on chloroform
  done clear
  View Answer play_arrow

• question_answer61) Aniline when diazotised in cold and then treated with dimethyl aniline gives a coloured product. Its structure would be :
  A)
     
  done clear
  B)
  
  done clear
  C)
  Aniline on diazotisation in cold (at 0° to 5°C) give benzene diazonium chloride. This benzene diazonium chloride on coupling reaction with dimethyl aniline gives a coloured product i.e., p-(N, N-dimethyl) aminoazobenzene (azodye).
  done clear
  D)
  
  done clear
  View Answer play_arrow

• question_answer62) The standard emf of a galvanic cell involving cell reaction with \[n=2\]is found to be 0.295 Vat 25° C. The equilibrium constant of the reaction would be :                                                                                
  A)
  \[2.0\times {{10}^{11}}\]     
  done clear
  B)
   \[\text{4}.0\times \text{l}{{0}^{\text{12}}}\]                             
  done clear
  C)
  \[\text{1}.0\times \text{l}{{0}^{\text{2}}}\]                
  done clear
  D)
  \[\text{1}.0\times \text{l}{{0}^{\text{1}0}}\] (Given: \[F=96500\,\,C\,mo{{l}^{-1}};\] \[R=8.314\,J{{K}^{-1}}mo{{l}^{-1}})\]
  done clear
  View Answer play_arrow

• question_answer63) The solubility product of a sparingly soluble salt\[\text{A}{{\text{X}}_{\text{2}}}\]is \[\text{3}\text{.2}\times \text{1}{{\text{0}}^{-11}}.\]Its solubility (in mol/L) is:
  A)
  \[\text{5}.\text{6}\times \text{l}{{0}^{-\text{6}}}\] 
  done clear
  B)
  \[\text{3}.\text{1}\times \text{l}{{0}^{-\text{4}}}\]                 
  done clear
  C)
  \[\text{2}\times \text{l}{{0}^{-\text{4}}}\]  
  done clear
  D)
  \[\text{4}\times \text{l}{{0}^{-\text{4}}}\]
  done clear
  View Answer play_arrow

• question_answer64) Among K, Ca, Fe and Zn, the element which can form more than one binary compound with chlorine is:
  A)
  Fe
  done clear
  B)
            Zn                                  
  done clear
  C)
  K                    
  done clear
  D)
                 Ca
  done clear
  View Answer play_arrow

• question_answer65) Which one of the following statements about the zeolites is false?                                 
  A)
  They are used as cation exchangers
  done clear
  B)
  They have open structure which enables them to take up small molecules
  done clear
  C)
  Zeolites are aluminosilicates having three dimensional network
  done clear
  D)
  Some of the \[SiO_{4}^{-4}\] units are replaced by\[AlO_{4}^{5-}\]and \[AlO_{6}^{9-}\] ions in zeolites
  done clear
  View Answer play_arrow

• question_answer66) Which of the following will not form a yellow precipitate on heating with an alkaline solution of iodine?
  A)
  \[\text{C}{{\text{H}}_{\text{3}}}\text{CH}\left( \text{OH} \right)\text{C}{{\text{H}}_{\text{3}}}\]
  done clear
  B)
  \[\text{C}{{\text{H}}_{\text{3}}}\text{C}{{\text{H}}_{\text{2}}}\text{CH}\left( \text{OH} \right)\text{C}{{\text{H}}_{\text{3}}}\]
  done clear
  C)
  \[\text{C}{{\text{H}}_{\text{3}}}\text{OH}\]
  done clear
  D)
  \[\text{C}{{\text{H}}_{\text{3}}}\text{C}{{\text{H}}_{\text{2}}}\text{OH}\]
  done clear
  View Answer play_arrow

• question_answer67) A sequence of how many nucleotides in messenger RNA makes a codon for an amino acid?
  A)
  Three
  done clear
  B)
                 Four                              
  done clear
  C)
  One                              
  done clear
  D)
  Two
  done clear
  View Answer play_arrow

• question_answer68) Which of the following is considered to be ananticancer species?
  A)
                                 
  done clear
  B)
  
  done clear
  C)
  
  done clear
  D)
   
  done clear
  View Answer play_arrow

• question_answer69) The hormone that helps in the conversion of glucose to glycogen is:                                               
  A)
  cortisone    
  done clear
  B)
  bile acids     
  done clear
  C)
  adrenaline 
  done clear
  D)
  insulin
  done clear
  View Answer play_arrow

• question_answer70) If the bond energies of \[\text{H}\text{H},\]\[\text{Br}\text{Br}\] and\[\text{H}\text{Br}\] are 433, 192 and 364 kJ \[mo{{l}^{-1}}\]respectively, then \[\Delta {{H}^{0}}\]for the reaction\[{{H}_{2}}(g)+B{{r}_{2}}(g)\xrightarrow[{}]{{}}2HBr(g)\]is:                                                                 
  A)
  \[-\text{261 kJ}\]    
  done clear
  B)
  \[+\text{1}0\text{3 kJ}\]      
  done clear
  C)
  \[+\text{261 kJ}\]   
  done clear
  D)
  \[-\text{1}0\text{3 kJ}\]
  done clear
  View Answer play_arrow

• question_answer71) A compound formed by elements X and Y crystallizes in a cubic structure in which the X atoms are at the comers of a cube and the Y atoms are at the face-centres. The formula of the compound is:
  A)
  \[X{{Y}_{3}}\]
  done clear
  B)
                                 \[{{X}_{3}}Y\]            
  done clear
  C)
  XY                                  
  done clear
  D)
  \[X{{Y}_{2}}\]
  done clear
  View Answer play_arrow

• question_answer72) Standard enthalpy and standard entropy changes for the oxidation of ammonia at 298 K are\[-382.64\,KJ\,mo{{l}^{-1}}\] and\[-145.6\,J{{K}^{-1}}\,mo{{l}^{-1}},\]respectively. Standard Gibbs energy change for the same reaction at 298 K is:
  A)
                                                                                                                                                  \[-\text{2221}.\text{1kJmo}{{\text{l}}^{-\text{1}}}\]
  done clear
  B)
  \[-339.3\,kJ\,mo{{l}^{-1}}\]
  done clear
  C)
  \[-\text{ 439}.\text{3 kJ mo}{{\text{l}}^{-1}}\]
  done clear
  D)
  \[-\text{523}.\text{2kJmo}{{\text{l}}^{-1}}\]
  done clear
  View Answer play_arrow

• question_answer73) The maximum number of molecules is present in:                                                                   
  A)
  \[15L\,\]of\[{{H}_{2}}\]gas at STP
  done clear
  B)
  \[5\,\,\,L\]of\[{{\text{N}}_{\text{2}}}\] gas at STP
  done clear
  C)
  \[\text{0}\text{.5}\]g of \[{{\text{H}}_{2}}\]gas
  done clear
  D)
  \[10g\,\]of\[{{O}_{2}}\]
  done clear
  View Answer play_arrow

• question_answer74) The radioactive isotope\[_{27}^{60}Co\] which is used in the treatment of cancer can be made by (n, p)reaction. For this reaction the target nucleus is:                                                                                                                           
  A)
  \[_{28}^{59}\text{Ni}\]
  done clear
  B)
                 \[_{27}^{59}\text{Co}\]       
  done clear
  C)
  \[_{28}^{60}\text{Ni}\]        
  done clear
  D)
  \[_{27}^{60}\text{Co}\]
  done clear
  View Answer play_arrow

• question_answer75) The enzyme which hydrolyses triglycerides to fatty acids and glycerol is called:                          
  A)
  maltase       
  done clear
  B)
  lipase           
  done clear
  C)
  zymase        
  done clear
  D)
  pepsin
  done clear
  View Answer play_arrow

• question_answer76) Which of the following co-ordination compounds would exhibit optical isomerism? 
  A)
  Pentaamminenitrocobalt\[\text{(III)}\] iodide
  done clear
  B)
  Diamminedinitroplatinum\[\text{(II)}\]
  done clear
  C)
  traos-dicyanobis (ethylenediamine)
  done clear
  D)
  Tris-(ethylendiamine) cobalt \[\text{(III)}\] bromide
  done clear
  View Answer play_arrow

• question_answer77) Among \[{{[Ni{{(CO)}_{4}}]}^{2-}},{{[Ni{{(CN)}_{4}}]}^{2-}},\]\[{{[NiC{{l}_{4}}]}^{2-}}\]species, the hybridisation states of the Ni atom are, respectively : (At. no. of Ni = 28)                                                                                                                         
  A)
  \[s{{p}^{3}},ds{{p}^{2}}\,\,ds{{p}^{2}}\]
  done clear
  B)
  \[s{{p}^{3}},ds{{p}^{2}}\,\,s{{p}^{3}}\]
  done clear
  C)
  \[s{{p}^{3}},s{{p}^{3}}\,\,ds{{p}^{2}}\]
  done clear
  D)
  \[ds{{p}^{2}},s{{p}^{3}}\,\,sp\]
  done clear
  View Answer play_arrow

• question_answer78) Among the following series of transition metal ions, the one in which all metal ions have \[3{{d}^{2}}\]electronic configuration is: (At. no. :\[Ti=22;\]\[V=23;\]\[Cr=24;Mn=25\])                                                         
  A)
  \[T{{i}^{3+}},{{V}^{2+}},C{{r}^{3+}},\,\,M{{n}^{4+}}\]
  done clear
  B)
  \[T{{i}^{+}},{{V}^{4+}},C{{r}^{6}},\,\,M{{n}^{7+}}\]
  done clear
  C)
  \[T{{i}^{4+}},{{V}^{3+}},C{{r}^{2+}},\,\,M{{n}^{3+}}\]
  done clear
  D)
  \[T{{i}^{2+}},{{V}^{3+}},C{{r}^{4+}},\,\,M{{n}^{5+}}\]
  done clear
  View Answer play_arrow

• question_answer79) The rapid change of pH near the stoichiometric point of an acid base titration is the basis of indicator detection. pH of the solution is related to ratio of the concentrations of the conjugate acid \[(HIn)\]and base \[(I{{n}^{-}})\]forms of the indicator given by the expression:                                                                
  A)
  \[\log \frac{[I{{n}^{-1}}]}{[\text{HIn}]}=p{{k}_{\ln }}-pH\]
  done clear
  B)
  \[\log \frac{[\text{Hn}]}{[I{{n}^{-}}]}=p{{k}_{In}}-pH\]
  done clear
  C)
  \[\log \frac{[HIn]}{[I{{n}^{-}}]}=pH-p{{K}_{\ln }}\]
  done clear
  D)
  \[\log \frac{[I{{n}^{-}}]}{[HIn]}=pH-p{{K}_{In}}\]
  done clear
  View Answer play_arrow

• question_answer80) \[C{{N}^{-}}\]is strong field ligand. This is due to the fact that:                                                                           
  A)
  it carries negative charge
  done clear
  B)
  it is a pseudo halide
  done clear
  C)
  it can accept electrons from metal species
  done clear
  D)
  it forms high spin complexes with metal species
  done clear
  View Answer play_arrow

• question_answer81) Considering \[{{H}_{2}}O\]as weak field ligand, the number of unpaired electrons in\[{{[Mn{{({{H}_{2}}O)}_{6}}]}^{2+}}\]will be (At. no. of \[Mn=25\]):                                                                                                                                                    
  A)
  three
  done clear
  B)
                 five
  done clear
  C)
  two               
  done clear
  D)
  four
  done clear
  View Answer play_arrow

• question_answer82) Considering entropy (S) as a thermodynamic parameter, the criterion for the spontaneity of any process is :
  A)
  \[\Delta \,{{S}_{system}}+\Delta {{S}_{surroundings}}>0\]
  done clear
  B)
  \[\Delta \,{{S}_{system}}-\Delta {{S}_{surroundings}}>0\]
  done clear
  C)
  \[\Delta \,{{S}_{system}}>0\]only
  done clear
  D)
  \[\Delta {{S}_{surroundings}}>0\]only
  done clear
  View Answer play_arrow

• question_answer83) \[{{H}_{2}}O\]is dipolar, whereas \[Be{{F}_{2}}\] is not. It is because:                                                                             
  A)
  the electro negativity of F is greater than that of O
  done clear
  B)
  \[{{H}_{2}}O\]involves hydrogen bonding whereas\[Be{{F}_{2}}\] is a discrete molecule
  done clear
  C)
  \[{{H}_{2}}O\] is linear and \[Be{{F}_{2}}\] is angular
  done clear
  D)
  \[{{H}_{2}}O\]is angular and \[Be{{F}_{2}}\] is linear
  done clear
  View Answer play_arrow

• question_answer84) Ionic radii are :                                                                                                                                                          
  A)
  inversely proportional to effective nuclear charge
  done clear
  B)
  inversely proportional to square of effective nuclear charge
  done clear
  C)
  directly proportional to effective nuclear charge
  done clear
  D)
  directly proportional to square of effective nuclear charge
  done clear
  View Answer play_arrow

• question_answer85) Which of the following does not have a         metal-carbon bond?                                                      
  A)
  \[Al{{(O{{C}_{2}}{{H}_{5}})}_{3}}\]
  done clear
  B)
  \[{{C}_{2}}{{H}_{5}}MgBr\]                 
  done clear
  C)
  \[K[Pt({{C}_{2}}{{H}_{4}})C{{l}_{3}}]\]            
  done clear
  D)
  \[Ni{{(CO)}_{4}}\]
  done clear
  View Answer play_arrow

• question_answer86) Lanthanides are:                                                                                                                                     
  A)
  14 elements in the sixth period (atomic no. = 90 to 103) that are filling 4f sub-level
  done clear
  B)
  14 elements in the seventh period (atomic no. = 90 to 103) that are filling 5f sub-level
  done clear
  C)
  14 elements in the sixth period (atomic no. = 58 to 71) that are filling 4f sub-level
  done clear
  D)
  14 elements in the seventh period (atomic no. = 58 to 71) that are filling 4f sub-level
  done clear
  View Answer play_arrow

• question_answer87) Which of the following forms cationic micelles above certain concentration?                              
  A)
  Sodium ethyl sulphate
  done clear
  B)
  Sodium acetate
  done clear
  C)
  Urea
  done clear
  D)
  Cetyltrimethylammonium bromide
  done clear
  View Answer play_arrow

• question_answer88) Which one of the following is a chain growth polymer ?                                                                        
  A)
  Starch        
  done clear
  B)
                                Nucleic acid               
  done clear
  C)
  Polystyrene               
  done clear
  D)
  Protein
  done clear
  View Answer play_arrow

• question_answer89) The correct statement in respect of protein hemoglobin is that it:                                    
  A)
  functions as a catalyst for biological reactions
  done clear
  B)
  maintains blood sugar level
  done clear
  C)
  act as an oxygen carrier in the blood
  done clear
  D)
  forms antibodies and offers resistance to diseases
  done clear
  View Answer play_arrow

• question_answer90) The frequency of radiation emitted when the electron falls from \[\text{n}=\text{4}\]to \[\text{n}=1\] in a hydrogen atom will be (Given ionisation energy of \[H=2.18\,\,{{10}^{-18}}J\,ato{{m}^{-1}}\]and \[h=6.625\times {{10}^{-34}}Js):\]                     
  A)
  \[\text{1}.\text{54}\times \text{l}{{0}^{\text{15}}}\text{ }{{\text{s}}^{-\text{1}}}\]
  done clear
  B)
  \[1.03\times {{10}^{15}}\,\,{{s}^{-1}}\]          
  done clear
  C)
  \[\text{3}.0\text{8}\times \text{1}{{0}^{\text{15}}}\text{ }{{\text{s}}^{-\text{1}}}\]
  done clear
  D)
  \[\text{2}.00\times \text{1}{{0}^{\text{15}}}\text{ }{{\text{s}}^{-\text{1}}}\]
  done clear
  View Answer play_arrow

• question_answer91) Camphor is often used in molecular mass determination because :                                 
  A)
  it is readily available
  done clear
  B)
  it has a very high cryoscopic constant
  done clear
  C)
  it is volatile
  done clear
  D)
  it is solvent for organic substances
  done clear
  View Answer play_arrow

• question_answer92) In an octahedral structure, the pair of dorbitals involved in \[{{d}^{2}}s{{p}^{3}}\]hybridisation is:    
  A)
  \[{{d}_{{{x}^{2}}-{{y}^{2}}}}{{d}_{{{z}^{2}}}}\]            
  done clear
  B)
  \[{{d}_{xz}},{{d}_{{{x}^{2}}-{{y}^{2}}}}\]       
  done clear
  C)
  \[{{d}_{{{z}^{2}}'}}{{d}_{xz}}\]           
  done clear
  D)
  \[{{d}_{xy}},{{d}_{yz}}\]
  done clear
  View Answer play_arrow

• question_answer93) Number of chiral carbon  atoms   in \[\beta -D+\]glucose is:                                                                
  A)
                  five               
  done clear
  B)
                 six                                                  
  done clear
  C)
  three                            
  done clear
  D)
  four
  done clear
  View Answer play_arrow

• question_answer94) The helical structure of protein is stabilized by                                                                                           
  A)
  dipeptide bonds      
  done clear
  B)
  hydrogen bonds      
  done clear
  C)
  ether bonds              
  done clear
  D)
  peptide bonds
  done clear
  View Answer play_arrow

• question_answer95) Which of the following is least reactive in anucleophilic substitution reaction ?                           
  A)
  \[{{(C{{H}_{3}})}_{3}}C-Cl\]
  done clear
  B)
                 \[\text{C}{{\text{H}}_{\text{2}}}=\,\,\text{CHC1}\]
  done clear
  C)
  \[\text{C}{{\text{H}}_{3}}\,\text{C}{{\text{H}}_{2}}\text{C1}\]                          
  done clear
  D)
  \[\text{C}{{\text{H}}_{\text{2}}}=\text{CHC}{{\text{H}}_{\text{2}}}\text{C1}\]
  done clear
  View Answer play_arrow

• question_answer96) The work done during the expansion of a gas from a volume of \[4\,d{{m}^{3}}\]to\[6\,d{{m}^{3}}\]against a constant external pressure of 3 atm, is:                                                                                                                                        
  A)
  \[-\,\,\text{6}\,\,\text{J}\]                 
  done clear
  B)
  \[-\,\,\text{6}0\text{8}\,\,\text{J}\]                               
  done clear
  C)
  \[+\text{ 3}0\text{4  J}\]                      
  done clear
  D)
  \[-\text{ 3}0\text{4 J}\]
  done clear
  View Answer play_arrow

• question_answer97) In \[Br{{F}_{3}}\] molecule, the lone pairs occupy equatorial positions to minimize :                
  A)
  lone pair-bond pair repulsion only
  done clear
  B)
  bond pair-bond pair repulsion only
  done clear
  C)
  lone pair-lone pair repulsion and lone pair-bond pair repulsion
  done clear
  D)
  lone pair-lone pair repulsion only
  done clear
  View Answer play_arrow

• question_answer98) Using anhydrous \[\text{AlC}{{\text{l}}_{3}}\] as catalyst, which one of the following reactions produce ethylbenzene (PhEt) ?
  A)
  \[{{\text{H}}_{\text{3}}}\text{C}\text{C}{{\text{H}}_{\text{2}}}\text{OH}+\text{ }{{\text{C}}_{\text{6}}}{{\text{H}}_{\text{6}}}\]
  done clear
  B)
  \[\text{C}{{\text{H}}_{\text{3}}}\text{CH}=\text{C}{{\text{H}}_{\text{2}}}+{{\text{C}}_{\text{6}}}{{\text{H}}_{\text{6}}}\]
  done clear
  C)
  \[{{\text{H}}_{\text{2}}}\text{C}=\text{C}{{\text{H}}_{\text{2}}}\text{+}{{\text{C}}_{\text{6}}}{{\text{H}}_{6}}\]
  done clear
  D)
  \[{{\text{H}}_{\text{3}}}\text{C}-\text{C}{{\text{H}}_{\text{3}}}+{{\text{C}}_{\text{6}}}{{\text{H}}_{\text{6}}}\]
  done clear
  View Answer play_arrow

• question_answer99) The molecular formula of diphenyl methane How many structural isomers are possible when one of the hydrogen is replaced by a chlorine atom?
  A)
  6  
  done clear
  B)
                                                 4                                     
  done clear
  C)
  8                     
  done clear
  D)
  7
  done clear
  View Answer play_arrow

• question_answer100) A solid compound 'X' on heating gives \[C{{O}_{2}}\]gas and a residue. The residue mixed with water forms on passing an excess of \[C{{O}_{2}}\]through ?Y? in water, a clear solution, 'Z' is obtained. On boiling 'Z' compound 'X' is reformed. The compound 'X' is:   
  A)
                                                                                                  \[\text{Ca}{{\left( \text{HC}{{\text{O}}_{\text{3}}} \right)}_{\text{2}}}\]
  done clear
  B)
                 \[\text{CaC}{{\text{O}}_{\text{3}}}\]
  done clear
  C)
  \[\text{N}{{\text{a}}_{\text{2}}}\text{C}{{\text{O}}_{\text{3}}}\]                    
  done clear
  D)
  \[{{\text{K}}_{2}}C{{O}_{3}}\]
  done clear
  View Answer play_arrow

• question_answer101) One of the parents of a cross has mutation in its mitochondria. In that cross, that parent is taken as a male. During segregation of \[{{F}_{2}}\]progenies that mutation is found in:                                               
  A)
  one-third of the progenies                         
  done clear
  B)
  none of the progenies
  done clear
  C)
   all of the progenies                                                       
  done clear
  D)
  fifty per-cent of die progenies
  done clear
  View Answer play_arrow

• question_answer102) When a fresh water protozoan possessing a contractile vacuole, is placed in a glass containing marine water, the vacuole will:                                                                                                                                      
  A)
  increase in number        
  done clear
  B)
  disappear                           
  done clear
  C)
   increase in size
  done clear
  D)
  decrease in size
  done clear
  View Answer play_arrow

• question_answer103) One of the following is a very unique feature of the mammalian body:                                  
  A)
  homeothermy 
  done clear
  B)
                                         presence of diaphragm
  done clear
  C)
   four chambered heart                                 
  done clear
  D)
  rib cage
  done clear
  View Answer play_arrow

• question_answer104) Chemically hormones are:                                                                                                                          
  A)
  biogenic amines only     
  done clear
  B)
                         proteins, steroids and biogenic amines
  done clear
  C)
   proteins only
  done clear
  D)
                                                         steroids only
  done clear
  View Answer play_arrow

• question_answer105) When \[\text{C}{{\text{O}}_{\text{2}}}\]concentration in blood increases, breathing becomes:                
  A)
  shallower and slow        
  done clear
  B)
                                         there is no effect on breathing
  done clear
  C)
   slow and deep                                                
  done clear
  D)
  faster and deeper
  done clear
  View Answer play_arrow

• question_answer106) Which one of the following pairs is not correctly matched?                                                          
  A)
  Vitamin \[{{B}_{12}}\]? Pernicious anaemia                      
  done clear
  B)
  Vitamin \[{{B}_{6}}\] ? Loss of appetite
  done clear
  C)
   Vitamin \[{{B}_{1}}\] ? Beri-beri                                            
  done clear
  D)
  Vitamin \[{{B}_{2}}\] ? Pellagra
  done clear
  View Answer play_arrow

• question_answer107) Uricotelism is found in:                                                                                                                                 
  A)
  mammals and birds                                        
  done clear
  B)
  fishes and fresh water protozoans
  done clear
  C)
   birds, reptiles and insects                                           
  done clear
  D)
   frogs and toads
  done clear
  View Answer play_arrow

• question_answer108) Duodenum has characteristic Brunner's glands which secrete two hormones called:       
  A)
  kinase, estrogen                                                             
  done clear
  B)
  secretin, cholecystokinin
  done clear
  C)
   prolactin, parathormone                                            
  done clear
  D)
   estradion,. Progesterone
  done clear
  View Answer play_arrow

• question_answer109) Mast cells of connective tissue contain:                                                                                                
  A)
  vasopressin and relaxin                                
  done clear
  B)
  heparin and histamine
  done clear
  C)
   heparin and calcitonin                                  
  done clear
  D)
   serotonin and melanin
  done clear
  View Answer play_arrow

• question_answer110) Cancer cells are more easily damaged by radiation than normal cells because they are:  
  A)
  starved of mutation                                                       
  done clear
  B)
  undergoing rapid division
  done clear
  C)
   different in structure                                                   
  done clear
  D)
   non-dividing
  done clear
  View Answer play_arrow

• question_answer111) Certain characteristic demographic features of developing countries are :                            
  A)
  high fertility, low or rapidly falling mortality rate, rapid population growth and a very young age distribution
  done clear
  B)
  high fertility, high density, rapidly rising mortality rate and a very young age distribution
  done clear
  C)
   high infant mortality, low fertility, uneven population growth and a very young age distribution
  done clear
  D)
   high mortality, high density, uneven population growth and a very old age distribution
  done clear
  View Answer play_arrow

• question_answer112) ATPase enzyme needed for muscle contraction is located in :                                                    
  A)
  actinin                  
  done clear
  B)
  troponin                             
  done clear
  C)
   myosin                               
  done clear
  D)
   actin
  done clear
  View Answer play_arrow

• question_answer113) Which one of the following is not correctly matched?                                                                    
  A)
  Glossinapalpalis ? Sleeping sickness                     
  done clear
  B)
  Culexpipiens ? Filariasis
  done clear
  C)
   Aedesaegypti ? Yellow fever                  
  done clear
  D)
   Anopheles culifacies ? Leishmaniasis
  done clear
  View Answer play_arrow

• question_answer114) Which one of the following pairs is not correctly matched?                                                          
  A)
  Streptomyces ? Antibiotic                                         
  done clear
  B)
  Serratia ? Drug addiction
  done clear
  C)
   Spirulina ? Single cell protein                  
  done clear
  D)
   Rhizobium ? Biofertilizer
  done clear
  View Answer play_arrow

• question_answer115) A major component of gobar gas is:                                                                                                       
  A)
  ammonia            
  done clear
  B)
  methane                            
  done clear
  C)
   ethane                               
  done clear
  D)
   butane
  done clear
  View Answer play_arrow

• question_answer116) A free living nitrogen-fixing cyan bacterium which can also form symbiotic association with the water fern Azolla is:                                                                                                                                                               
  A)
  Tolypothrix        
  done clear
  B)
  Chlorella                             
  done clear
  C)
   Nostoc                
  done clear
  D)
   Anabaena
  done clear
  View Answer play_arrow

• question_answer117) In the ABO system of blood groups, if both antigens are present but no antibody, the blood group of the individual would be :                                                                                                                                          
  A)
  B                                            
  done clear
  B)
  O                                            
  done clear
  C)
   AB                        
  done clear
  D)
          A
  done clear
  View Answer play_arrow

• question_answer118) Which one of the following pairs correctly matches a hormone with a disease resulting from its deficiency?
  A)
  Luteinizing hormone ? Failure of ovulation        
  done clear
  B)
  Insulin ? Diabetes insipidus
  done clear
  C)
   Thyroxine ? Tetany                                                     
  done clear
  D)
   Parathyroid hormone ? Diabetes mellitus
  done clear
  View Answer play_arrow

• question_answer119) Angiosperms have dominated the land flora primarily because of their :                                               
  A)
  power of adaptability in diverse habitat
  done clear
  B)
  property of producing large number of seeds
  done clear
  C)
   nature of some pollination                                        
  done clear
  D)
   domestication by man
  done clear
  View Answer play_arrow

• question_answer120) In a mutational event, when adenine is replaced by guanine, it is the case of :                   
  A)
  frame shift mutation
  done clear
  B)
  transcription     
  done clear
  C)
   transition           
  done clear
  D)
  transversion
  done clear
  View Answer play_arrow

• question_answer121) An ovule which becomes curved so that the nucellus and embryo sac lie at right angles to the funicle is :
  A)
  hemitropous                     
  done clear
  B)
  campylotropous              
  done clear
  C)
   anatropous       
  done clear
  D)
   orthotropous
  done clear
  View Answer play_arrow

• question_answer122) Ovulation in the human female normally takes place during the menstrual cycle:              
  A)
  at the mid secretory phase                                         
  done clear
  B)
  just before the end of the secretory phase
  done clear
  C)
   at the beginning of the proliferative phase        
  done clear
  D)
   at the end of the proliferative phase
  done clear
  View Answer play_arrow

• question_answer123) Injury to vagus nerve in human is not likely to affect:                                                                     
  A)
  tongue movements                                                       
  done clear
  B)
  gastrointestinal movements
  done clear
  C)
   pancreatic secretion                                                     
  done clear
  D)
   cardiac movements
  done clear
  View Answer play_arrow

• question_answer124) Which of the following hormones is not a secretion product of human placenta?                              
  A)
  Human chorionic gonadotropin                
  done clear
  B)
  Prolactin
  done clear
  C)
   Estrogen                                                                            
  done clear
  D)
   Progesterone
  done clear
  View Answer play_arrow

• question_answer125) You are required to draw blood from a patient and to keep it in a test tube for analysis of blood corpuscles and plasma. You are also provided with the following four types of test tubes. Which of them will you not use for the prupose?                                                                                                                                               
  A)
  Test tube containing calcium bicarbonate            
  done clear
  B)
  Chilled test tube
  done clear
  C)
   Test tube containing heparin                                    
  done clear
  D)
   Test tube containing sodium oxalate
  done clear
  View Answer play_arrow

• question_answer126) The cardiac pace maker in a patient fails to function normally. The doctors find that an artificial pace maker is to be grafted in him. It is likely that it will be grafted at the site of :                                      
  A)
  atrioventricular bundle                                 
  done clear
  B)
  Purkinje system
  done clear
  C)
   sinuatrial node                                                
  done clear
  D)
  atrioventricular node
  done clear
  View Answer play_arrow

• question_answer127) Blood analysis of a patient reveals an unusually high quantity of carboxyhaemoglobin content. Which of the following conclusions is most likely to be correct? The patient has been inhailing polluted air containing usually high content of:                                                                                                                                               
  A)
  carbon disulphide           
  done clear
  B)
  chloroform        
  done clear
  C)
   carbon dioxide
  done clear
  D)
   carbon monoxide
  done clear
  View Answer play_arrow

• question_answer128) What is a keystone species?                                                                                                                      
  A)
  A species which makes up only a small proportion of the total biomass of a community, yet has a huge impact on the community's organization and survival
  done clear
  B)
  A common species that has plenty of biomass, yet has a fairly low impact on the community's organization
  done clear
  C)
  A rare species that has minimal impact on the biomass and on other species in the community
  done clear
  D)
  A dominant species that constitutes a largproportion of the biomass and which affects many other species
  done clear
  View Answer play_arrow

• question_answer129) DNA finger printing refers to:                                                                                                                    
  A)
  molecular analysis of profiles of DNAs amples
  done clear
  B)
  analysis of DMA samples using imprinting device
  done clear
  C)
   techniques used for molecular analysis of different specimens of DNA
  done clear
  D)
   techniques used for identification of fingerprints of individuals
  done clear
  View Answer play_arrow

• question_answer130) Flagella of prokaryotic and eukaryotic cells differ in :
  A)
  type of movement and placement in cell
  done clear
  B)
  location in cell and mode of functioning
  done clear
  C)
   micro-tubular organisation and type of movement
  done clear
  D)
   micro-tubular organisation and function
  done clear
  View Answer play_arrow

• question_answer131) In which one of the following enzymes, copper is necessarily associated as an activator?              
  A)
  Carbonic anhydrase       
  done clear
  B)
                                         Tryptophanase
  done clear
  C)
   Lactic dehydrogenase                                  
  done clear
  D)
   Tyrosinase
  done clear
  View Answer play_arrow

• question_answer132) The animal with bilateral symmetry in young stage, and radial pentamerous symmetry in the adult stage belong to the phylum:                                                                                                                                              
  A)
  Annelida     
  done clear
  B)
                        Mollusca                             
  done clear
  C)
   Cnidaria                              
  done clear
  D)
   Echinodennata
  done clear
  View Answer play_arrow

• question_answer133) In Arthropoda, head and thorax are often fused to form cephalothorax, but in which one of the following classes, is the body divided into head, thorax and abdomen?                                                         
  A)
  Insects 
  done clear
  B)
  Myriapoda                         
  done clear
  C)
   Crustacea                          
  done clear
  D)
   Arachnida and Crustacea.
  done clear
  View Answer play_arrow

• question_answer134) Which one of the following is the correct matching of a vitamin, its nature and its deficiency disease?
  A)
  Vitamin A ? Fat soluble ? Nightblindness          
  done clear
  B)
  Vitamin K ? Fat soluble ? Beri-beri
  done clear
  C)
   Vitamin A ? Fat soluble ?Beri-beri                      
  done clear
  D)
   Vitamin K? Water soluble?Pellagra
  done clear
  View Answer play_arrow

• question_answer135) Lack of independent assortment of two genes A and B in fruit fly Drosophila is due to:
  A)
  repulsion            
  done clear
  B)
  recombination 
  done clear
  C)
   linkage                                
  done clear
  D)
   crossing over
  done clear
  View Answer play_arrow

• question_answer136) In your opinion, which is the most effective way to conserve the plant diversity of an area?        
  A)
  By tissue culture method.                                           
  done clear
  B)
  By creating biosphere reserve
  done clear
  C)
   By creating botanical garden                                     
  done clear
  D)
   By developing seed bank
  done clear
  View Answer play_arrow

• question_answer137) Which of the following is expected to have the highest value \[(gm/{{m}^{2}}yr)\] in a grassland ecosystem ?
  A)
  Secondary production (SP)                                         
  done clear
  B)
  Tertiary production (TP)
  done clear
  C)
   Gross production (GP)                                 
  done clear
  D)
   Net production (NP)
  done clear
  View Answer play_arrow

• question_answer138) In 1984, the Bhopal gas tragedy took place because methyl isocyanate:                                 
  A)
  reacted with DDT                                                            
  done clear
  B)
  reacted with ammonia
  done clear
  C)
   reacted with \[\text{C}{{\text{O}}_{\text{2}}}\]                                                              
  done clear
  D)
   reacted with water
  done clear
  View Answer play_arrow

• question_answer139) If by radiation all nitrogenase enzymes are inactivated, then there will be no :                   
  A)
  fixation of nitrogen in legumes 
  done clear
  B)
  fixation of atmospheric nitrogen
  done clear
  C)
  conversion from nitrate to nitrite in legumes
  done clear
  D)
  conversion from ammonium to nitrate in soil
  done clear
  View Answer play_arrow

• question_answer140) Age of fossils in the past was generally determined by radio-carbon method and other methods involving radioactive elements found in the rocks. More precise methods, which were used recently and led to the revision of the evolutionary period for different groups of organisms, includes :                             
  A)
  study of carbohydrates/proteins in fossils           
  done clear
  B)
  study of the conditions of fossilization
  done clear
  C)
   electron spin resonance (ESR) and fossil DNA
  done clear
  D)
   study of carbohydrates/proteins in rocks
  done clear
  View Answer play_arrow

• question_answer141) Lead concentration in blood is considered alarming if it is:                                                            
  A)
  \[\text{20}\mu g/100\,\,ml\]     
  done clear
  B)
  \[30\mu g/100\,\,ml\]  
  done clear
  C)
  \[4-6\mu g/100\,\,ml\] 
  done clear
  D)
   \[10\mu g/100\,\,ml\]
  done clear
  View Answer play_arrow

• question_answer142) What kind of evidence suggested that man is more closely related with chimpanzee than with other hominoid apes?
  A)
  Evidence from DNA from sex chromosomes only
  done clear
  B)
  Comparison of chromosomes morphology only
  done clear
  C)
   Evidence from fossil remains and the fossil mitochondrial DNA alone
  done clear
  D)
   Evidence from DNA extracted from sex chromosome, autosomes and mitochondria
  done clear
  View Answer play_arrow

• question_answer143) Anthesis is a phenomenon which refers to:                                                                                        
  A)
  reception of pollen by stigma                    
  done clear
  B)
  formation of pollen
  done clear
  C)
  development of anther                               
  done clear
  D)
   opening of flower bud
  done clear
  View Answer play_arrow

• question_answer144) One set of a plant was grown at 12 hours day and 12 hours night period cycles and it flowered while in the other set night phase was interrupted by flash of light arid it did not produce flower. Under which one of the following categories will you place this plant?                                                                                              
  A)
  Long day                             
  done clear
  B)
  Darkness neutral             
  done clear
  C)
  Day neutral        
  done clear
  D)
   Short day
  done clear
  View Answer play_arrow

• question_answer145) In which one of the following pairs is the specific characteristic of soil not correctly matched?
  A)
  Laterite ? Contains aluminium compound          
  done clear
  B)
  Terra rossa ? Most suitable for roses
  done clear
  C)
   Chemozems ? Richest soil in the world              
  done clear
  D)
   Black soil ? Rich in calcium carbonate
  done clear
  View Answer play_arrow

• question_answer146) Recently Govt. of India has allowed mixing of alcohol in petrol. What is the amount of alcohol permitted for mixing in petrol?                                                                                                                                
  A)
  2.5%                                     
  done clear
  B)
  10-15%                
  done clear
  C)
  10%                       
  done clear
  D)
         5%
  done clear
  View Answer play_arrow

• question_answer147) In a longitudinal section of a root, starting from the tip upward the four zones occur in the following order:
  A)
  root cap, cell division, cell enlargement, cell maturation
  done clear
  B)
  root cap, cell division, cell maturation, cell enlargement
  done clear
  C)
  cell division, cell enlargement, cell maturation, root cap
  done clear
  D)
  cell division,  cell  maturation,   cell enlargement, root cap
  done clear
  View Answer play_arrow

• question_answer148) Presence of gills in the tadpole of frog indicates that:                                                                     
  A)
  fishes were amphibious in the past                        
  done clear
  B)
  fishes evolved from frog like ancestors
  done clear
  C)
   frogs will have gills in future                                      
  done clear
  D)
   frogs evolved from gilled ancestors
  done clear
  View Answer play_arrow

• question_answer149) An ecosystem which can be easily damaged but can recover after some time if damaging effect stops, will be having:                                                                                                                                                                               
  A)
  low stability and high resilience                
  done clear
  B)
  high stability and low resilience
  done clear
  C)
   low stability and low resilience                 
  done clear
  D)
   high stability and high resilience
  done clear
  View Answer play_arrow

• question_answer150) During transcription, the nucleotide sequence of the DNA strand that is being coded is ATACG, then the nucleotide sequence in the    m-RNA would be :                                                                                     
  A)
  TATGC                 
  done clear
  B)
  TCTGG                 
  done clear
  C)
   UAUGC                              
  done clear
  D)
   UATGG
  done clear
  View Answer play_arrow

• question_answer151) Extra nuclear inheritance is a consequence of presence of genes in :                                      
  A)
  mitochondria ah-d-chloroplasts                
  done clear
  B)
  endoplasmic reticulum and mitochondria
  done clear
  C)
  ribosomes and chloroplast                                          
  done clear
  D)
  lysosomes and ribosomes
  done clear
  View Answer play_arrow

• question_answer152) Which one of the following hormones is a modified amino acid?                                                               
  A)
  Epinephrine      
  done clear
  B)
  Progesterone   
  done clear
  C)
   Prostaglandin  
  done clear
  D)
   Estrogen
  done clear
  View Answer play_arrow

• question_answer153) Viruses that infect bacteria, multiply and cause their lysis, are called :                                     
  A)
  lysozymes          
  done clear
  B)
  lipolytic                
  done clear
  C)
   lyric                      
  done clear
  D)
          lysogenic
  done clear
  View Answer play_arrow

• question_answer154) The recessive genes located on X-chromosome in humans are always :                                 
  A)
  lethal                    
  done clear
  B)
  sub-lethal                           
  done clear
  C)
   expressed in males       
  done clear
  D)
   expressed in females
  done clear
  View Answer play_arrow

• question_answer155) In \[{{C}_{3}}\] plants, the first stable product of photosynthesis during the dark reaction is :     
  A)
  malic acid                                                                            
  done clear
  B)
  oxaloacetic acid
  done clear
  C)
  3-phoshoglyceric acid                                    
  done clear
  D)
  phosphoglyceraldehyde
  done clear
  View Answer play_arrow

• question_answer156) Crossing over that results in genetic recombination in higher organisms occurs between:             
  A)
  sister chromatids of bivalent                                      
  done clear
  B)
  non-sister chromatids of a bivalent
  done clear
  C)
  two daughter nuclei                                                      
  done clear
  D)
  two different bivalents
  done clear
  View Answer play_arrow

• question_answer157) Which of the following statements is not true for retroviruses?                                                
  A)
  DNA is not present at any stage in the lifecycle of retroviruses
  done clear
  B)
  Retroviruses carry gene for RNA dependent DNA polymerase
  done clear
  C)
   The genetic   material   in   mature retroviruses is RNA
  done clear
  D)
   Retroviruses are causative agents for certain kinds of cancer in man
  done clear
  View Answer play_arrow

• question_answer158) Restriction end nucleases :                                                                                                                         
  A)
  are present in mammalian cells for degradation of DNA when the cell dies
  done clear
  B)
  are used in genetic engineering for ligating two DNA molecules
  done clear
  C)
   are used for in vitro DNA synthesis
  done clear
  D)
   are synthesized by bacteria as part of their defence mechanism
  done clear
  View Answer play_arrow

• question_answer159) In the resting state of the neural membrane, diffusion due to concentration gradients, if allowed, would drive:                                                                                                                                                                
  A)
  \[{{K}^{+}}\]into the cell                                                              
  done clear
  B)
  \[{{K}^{+}}\]and \[N{{a}^{+}}\]out of the cell
  done clear
  C)
   \[N{{a}^{+}}\]into the cell                                                          
  done clear
  D)
   \[N{{a}^{+}}\] out of the cell
  done clear
  View Answer play_arrow

• question_answer160) The maximum growth rate occurs in:                                                                                                     
  A)
  stationary phase             
  done clear
  B)
  senescent phase             
  done clear
  C)
   lag phase                           
  done clear
  D)
   exponential phase
  done clear
  View Answer play_arrow

• question_answer161) Diversification in plant life appeared:                                                                                                     
  A)
  due to long periods of evolutionary changes
  done clear
  B)
  due to abrupt mutations
  done clear
  C)
   suddenly on earth
  done clear
  D)
   by seed dispersal
  done clear
  View Answer play_arrow

• question_answer162) The technique of obtaining large number of plantlets by tissue culture method is called :             
  A)
  plantlet culture
  done clear
  B)
  organ culture
  done clear
  C)
          micro-propagation        
  done clear
  D)
   macro-propagation
  done clear
  View Answer play_arrow

• question_answer163) Cell elongation in internodal regions of the green plants takes place due to :                      
  A)
  indole acetic acid             
  done clear
  B)
  cytokinins                           
  done clear
  C)
   gibberellins                       
  done clear
  D)
   ethylene
  done clear
  View Answer play_arrow

• question_answer164) The most abundant element present in the plants is:                                                                     
  A)
  carbon                 
  done clear
  B)
  nitrogen                              
  done clear
  C)
  manganese       
  done clear
  D)
  iron
  done clear
  View Answer play_arrow

• question_answer165) Photosynthetically Active Radiation (PAR)represents the following range of wavelength :
  A)
  500-600 nm        
  done clear
  B)
  450-950 nm                        
  done clear
  C)
   340-450 nm       
  done clear
  D)
   400-700 nm
  done clear
  View Answer play_arrow

• question_answer166) A terrestrial animal must be able to :                                                                                                      
  A)
  excrete large amounts of water in urine               
  done clear
  B)
  conserve water
  done clear
  C)
  actively pump salts out through the skin              
  done clear
  D)
  excrete large amounts of salts in urine
  done clear
  View Answer play_arrow

• question_answer167) A male human is heterozygous for autosomalgenes A and B and is also hemizygous for haemophilic gene h. what proportion of his sperms will be abh?                                                                                    
  A)
  \[\frac{1}{8}\]                                   
  done clear
  B)
  \[\frac{1}{32}\]                                
  done clear
  C)
  \[\frac{1}{16}\]                                
  done clear
  D)
   \[\frac{1}{4}\]
  done clear
  View Answer play_arrow

• question_answer168) Edible part of mango is:                                                                                                                
  A)
  endocarp            
  done clear
  B)
  receptacle                          
  done clear
  C)
   epicarp                               
  done clear
  D)
   mesocarp
  done clear
  View Answer play_arrow

• question_answer169) In chloroplasts, chlorophyll is present in the:                                                                                      
  A)
  outer membrane            
  done clear
  B)
  inner membrane             
  done clear
  C)
   thylakoids                         
  done clear
  D)
   stroma
  done clear
  View Answer play_arrow

• question_answer170) In glycolysis, during oxidation electrons are removed by:                                                             
  A)
  ATP                                                                                       
  done clear
  B)
  glyceraldehyde-3-phosphate
  done clear
  C)
   \[\text{NA}{{\text{D}}^{+}}\]                                                                   
  done clear
  D)
   molecular oxygen
  done clear
  View Answer play_arrow

• question_answer171) Dough kept over-night in warm weather becomes soft and spongy because of:                
  A)
  absorption of carbon dioxide from atmosphere
  done clear
  B)
  fermentation
  done clear
  C)
   cohesion
  done clear
  D)
   osmosis
  done clear
  View Answer play_arrow

• question_answer172) In the somatic cell cycle:                                                                                                                              
  A)
  in\[{{G}_{1}}\]phase DNA content is double the amount of DNA present in the original cell
  done clear
  B)
  DNA replication takes place in S-phase
  done clear
  C)
   a short interphase is followed by a long mitotic phase
  done clear
  D)
   \[{{G}_{2}}\]phase follows mitotic phase
  done clear
  View Answer play_arrow

• question_answer173) A nutritonally wild type organism, which does not require any additional growth supplement is known as:
  A)
  phenotype        
  done clear
  B)
  holotype                             
  done clear
  C)
   auxotroph         
  done clear
  D)
   prototroph
  done clear
  View Answer play_arrow

• question_answer174) Which of the following propagates through leaf-tip?                                                                      
  A)
  Walking fern                     
  done clear
  B)
  Sprout-leaf plant             
  done clear
  C)
   Marchantia                       
  done clear
  D)
   Muss
  done clear
  View Answer play_arrow

• question_answer175) Common indicator organism of water pollution is:                                                                           
  A)
  Lannapancicostata          
  done clear
  B)
  Eichhorniacrassipes        
  done clear
  C)
   Escherichia coli
  done clear
  D)
   Entamoebahistolytica
  done clear
  View Answer play_arrow

• question_answer176) ELISA is used to detect viruses, where:                                                                                                 
  A)
  DNA probes are required                                            
  done clear
  B)
  southern blotting is done
  done clear
  C)
   alkaline phosphatase is the key reagent              
  done clear
  D)
   catalase is the key reagent
  done clear
  View Answer play_arrow

• question_answer177) Phenetic classification of organisms is based on:                                                                                               
  A)
  observable characteristics of existing organisms
  done clear
  B)
  the ancestral lineage of existing organisms
  done clear
  C)
   dendrogram based on DNA characteristics
  done clear
  D)
   sexual characteristics
  done clear
  View Answer play_arrow

• question_answer178) If you are provided with root-tips of onion in your class and are asked to count the chromosomes, which of the following stages can you most conveniently look into?                                                  
  A)
  Metaphase        
  done clear
  B)
  Telophase                          
  done clear
  C)
   Anaphase          
  done clear
  D)
   Prophase
  done clear
  View Answer play_arrow

• question_answer179) When a diploid female plant is crossed with atetraploid male, the ploidy of endosperm cellsin the resulting seed is:                                                                                                                                                                               
  A)
  tetraploidy         
  done clear
  B)
  pentaploidy                       
  done clear
  C)
   diploidy                              
  done clear
  D)
   triploidy
  done clear
  View Answer play_arrow

• question_answer180) India's wheat yield revolution in the 1960s waspossible primarily due to:                                              
  A)
  hybrid seeds                                                                     
  done clear
  B)
  increased chlorophyll content
  done clear
  C)
   mutations resulting in plant height reduction    
  done clear
  D)
   quantitative trait mutations
  done clear
  View Answer play_arrow

• question_answer181) The most likely reason for the development of resistance against pesticides in insect damaginga crop is :
  A)
  random mutations                                                         
  done clear
  B)
  genetic recombination
  done clear
  C)
   directed mutations                                                       
  done clear
  D)
   acquired heritable changes
  done clear
  View Answer play_arrow

• question_answer182) The following ratio is generally constant for a given species                                                         
  A)
  \[\text{A}+\text{G}/\text{C}+\text{T}\]              
  done clear
  B)
  \[\text{T}+\text{C}/\text{G}+\text{A}\]              
  done clear
  C)
  \[\text{G}+\text{C}/\text{A}+\text{T}\]              
  done clear
  D)
  \[\text{A}+\text{C}/\text{T}+\text{G}\]
  done clear
  View Answer play_arrow

• question_answer183) A self-fertilizing trihybrid plant forms :                                                                                                  
  A)
  8 different gametes and 64 different zygotes
  done clear
  B)
  4 different gametes and 16 different zygotes
  done clear
  C)
   8 different gametes and 16 different zygotes
  done clear
  D)
   8 different gametes and 32 different zygotes
  done clear
  View Answer play_arrow

• question_answer184) Lichens are well known combination of an alga and a fungus where fungus has:                
  A)
  a saprophytic relationship with the alga                
  done clear
  B)
  an epiphytic relationship with the alga     
  done clear
  C)
   a parasitic relationship with the alga                      
  done clear
  D)
   a symbiotic relationship with the alga      
  done clear
  View Answer play_arrow

• question_answer185) In oogamy, fertilization involves:                                                                                                             
  A)
  a small non-motile female gamete and a large motile male gamete
  done clear
  B)
  a large non-motile female gamete and as mall motile male gamete
  done clear
  C)
   a large non-motile female gamete and as mall non-motile male gamete
  done clear
  D)
   a large motile female gamete and a small non-motile male gamete
  done clear
  View Answer play_arrow

• question_answer186) Which one of the following is a living fossil?                                                                                        
  A)
  Cycas                    
  done clear
  B)
  Moss    
  done clear
  C)
          Saccharomyces               
  done clear
  D)
   Spirogyra
  done clear
  View Answer play_arrow

• question_answer187) In which one of the following habitats does the diurnal temperature of soil surface vary most?
  A)
  Shrub land         
  done clear
  B)
  Forest                  
  done clear
  C)
  Desert                 
  done clear
  D)
         Grassland
  done clear
  View Answer play_arrow

• question_answer188) Which form of RNA has a structure resembling clover leaf?                                                         
  A)
  \[r\]-RNA                           
  done clear
  B)
  \[hn\]-RNA                        
  done clear
  C)
   \[m\]-RNA       
  done clear
  D)
                          \[t\]-RNA
  done clear
  View Answer play_arrow

• question_answer189) The telomeres of eukaryotic chromosomes consists of short sequences of :                       
  A)
  thymine rich repeats                                                     
  done clear
  B)
  cytosine rich repeats
  done clear
  C)
   adenine rich repeats                                                    
  done clear
  D)
   guanine rich repeats
  done clear
  View Answer play_arrow

• question_answer190) After a mutation at a genetic locus the character of an organism changes due to the change in
  A)
  protein structure                                                            
  done clear
  B)
  DNA replication
  done clear
  C)
  protein synthesis pattern                                            
  done clear
  D)
  RNA transcription pattern
  done clear
  View Answer play_arrow

• question_answer191) During replication of a bacterial chromosome DNA synthesis starts from a replication origin site and:
  A)
  RNA primers are involved                                           
  done clear
  B)
  is facilitated by telomerase
  done clear
  C)
  moves in one direction of the site                           
  done clear
  D)
  moves in bi-directional way
  done clear
  View Answer play_arrow

• question_answer192) Plants adapted to low light intensity have:                                                                                          
  A)
  larger photosynthetic unit size than the sun plants
  done clear
  B)
  higher rate of \[\text{C}{{\text{O}}_{\text{2}}}\]fixation than the sun plants
  done clear
  C)
   more extended root system
  done clear
  D)
   leaves modified to spines
  done clear
  View Answer play_arrow

• question_answer193) The \[\text{Ti}\]plasmid, is often used for making transgenic plants. This plasmid is found in :    
  A)
  Azotobacter
  done clear
  B)
  Rhizobium of the roots of leguminous plants
  done clear
  C)
   Agrobacterium
  done clear
  D)
   Yeast as a 2 um plasmid
  done clear
  View Answer play_arrow

• question_answer194) In a plant, red fruit (R) is dominant over yellow fruit (r) and tallness (T) is dominant over shortness (t). If a plant with RRTt genotype is crossed with a plant that is rrtt, :                                                           
  A)
  25% will be tall with red fruit                                      
  done clear
  B)
  50% will be tall with red fruit
  done clear
  C)
   75% will be tall with red fruit                                     
  done clear
  D)
   all of the offspring will tall with red fruit
  done clear
  View Answer play_arrow

• question_answer195) According to Oparin, which one of the following was not present in the primitive atmosphere of the earth ?
  A)
  Methane            
  done clear
  B)
  Oxygen
  done clear
  C)
          Hydrogen     
  done clear
  D)
          Water vapour
  done clear
  View Answer play_arrow

• question_answer196) Which 'one of the following precedesre-formation of the nuclear envelope during M phase of the cell cycle?
  A)
  Decondensation from chromosomes and reassembly of the nuclear lamina
  done clear
  B)
  Transcription from chromosomes and reassembly of the nuclear lamina
  done clear
  C)
   Formation of the contractile ring and formation of the phragmoplast
  done clear
  D)
   Formation of the contractile ring and transcription from chromosomes
  done clear
  View Answer play_arrow

• question_answer197) The richest sources of vitamin-Big are:                                                                                                  
  A)
  goat's liver and Spirulina                                              
  done clear
  B)
  chocolate and green gram
  done clear
  C)
   rice and hen's egg                                                          
  done clear
  D)
   carrot and chicken's breast
  done clear
  View Answer play_arrow

• question_answer198) The most thoroughly studied of the known bacteria-plant interactions is the:                    
  A)
  cyanobacterial symbiosis with some aquatic ferns
  done clear
  B)
  gall formation on certain angiosperms by Agrobacterium
  done clear
  C)
   nodulation of Sesbania stems by nitrogen fixing bacteria
  done clear
  D)
   plant growth stimulation by phosphate solublising bacteria
  done clear
  View Answer play_arrow

• question_answer199) In transgenics, expression of transgene in target tissue is determined by:                            
  A)
  enhancer                            
  done clear
  B)
  transgene                          
  done clear
  C)
   promoter      
  done clear
  D)
          reporter
  done clear
  View Answer play_arrow

• question_answer200) A normal woman whose father was colourblind is married to a normal man. The sons would be:
  A)
  75% colourblind               
  done clear
  B)
  50% colourblind               
  done clear
  C)
   all normal                          
  done clear
  D)
   all colourblind
  done clear
  View Answer play_arrow