Solved papers for NEET NEET SOLVED PAPER 2016 Phase-I

done NEET SOLVED PAPER 2016 Phase-I Total Questions - 180

• question_answer1) From a disc of radius R and mass M, a circular hole of diameter R, whose rim passes through the centre is cut. What is the moment of inertia of the remaining part of the disc about a perpendicular axis, passing through the centre?
  A)
   \[15\,M{{R}^{2}}/32\]  
  done clear
  B)
   \[13\,M{{R}^{2}}/32\]
  done clear
  C)
   \[11\,M{{R}^{2}}/32\]                  
  done clear
  D)
    \[9\,M{{R}^{2}}/32\]
  done clear
  View Answer play_arrow

• question_answer2) A square loop ABCD carrying a current i, is placed near and coplanar with a long straight conductor XY carrying a current I, the net force on the loop will be :-                                                                      
  A)
   \[\frac{2{{\mu }_{0}}li}{3\pi }\]                
  done clear
  B)
   \[\frac{{{\mu }_{0}}li}{2\pi }\]
  done clear
  C)
    \[\frac{2{{\mu }_{0}}liL}{3\pi }\]                             
  done clear
  D)
    \[\frac{{{\mu }_{0}}liL}{2\pi }\]
  done clear
  View Answer play_arrow

• question_answer3) The magnetic susceptibility is negative for :
  A)
   diamagnetic material only
  done clear
  B)
   paramagnetic material only
  done clear
  C)
    ferromagnetic material only
  done clear
  D)
    paramagnetic and ferromagnetic materials
  done clear
  View Answer play_arrow

• question_answer4) A siren emitting a sound of frequency 800 Hz moves away from an observer towards a cliff at a speed of \[\text{15m}{{\text{s}}^{-1}}\]. Then, the frequency of sound that the observer hears in the echo reflected from the cliff is:                                                                                                                                                                                 (Take velocity of sound in air\[=330\text{m}{{\text{s}}^{-1}}\])
  A)
   765 Hz                 
  done clear
  B)
   800 Hz
  done clear
  C)
   838 Hz                 
  done clear
  D)
    885 Hz
  done clear
  View Answer play_arrow

• question_answer5) A capacitor of 2μF is charged as shown in the diagram. When the switch S is turned to position 2, the percentage of its stored energy dissipated is:                                                                                  
  A)
   0%                                        
  done clear
  B)
   20%
  done clear
  C)
   75%                                      
  done clear
  D)
    80%
  done clear
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• question_answer6) In a diffraction pattern due to a single slit of width 'a', the first minimum is observed at an angle \[{{30}^{o}}\] when light of wavelength \[5000\text{ }\overset{o}{\mathop{\text{A}}}\,\] is incident on the slit. The first secondary maximum is observed at an angle of :
  A)
   \[{{\sin }^{-1}}\left( \frac{1}{4} \right)\]                               
  done clear
  B)
   \[{{\sin }^{-1}}\left( \frac{2}{3} \right)\]
  done clear
  C)
    \[{{\sin }^{-1}}\left( \frac{1}{2} \right)\]                              
  done clear
  D)
    \[{{\sin }^{-1}}\left( \frac{3}{4} \right)\]
  done clear
  View Answer play_arrow

• question_answer7) At what height from the surface of earth the gravitation potential and the value of g are \[5.4\text{ }\times \text{ }{{10}^{7}}\text{ J k}{{\text{g}}^{2}}\] and \[6.0\text{ m}{{\text{s}}^{2}}\] respectively? Take the radius of earth as 6400 km:                                                                                                      
  A)
   2600 km                             
  done clear
  B)
   1600 km
  done clear
  C)
    1400 km                            
  done clear
  D)
    2000 km
  done clear
  View Answer play_arrow

• question_answer8) Out of the following options which one can be   used to produce a propagating electromagnetic wave?                                                                                                                                                                                
  A)
   A charge moving at constant velocity
  done clear
  B)
   A stationary charge
  done clear
  C)
   A chargeless particle
  done clear
  D)
    An accelerating charge
  done clear
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• question_answer9) Two identical charged spheres suspended from a common point by two massless strings of lengths \[l,\]are initially at a distance \[d\,(d<<l)\]apart because of their mutual repulsion. The charges begin to leak from both the spheres at a constant rate. As a result, the spheres approach each other with a velocity v. Then v varies as a function of the distance x between the spheres, as:                                                                      
  A)
   \[v\propto {{x}^{\frac{1}{2}}}\]               
  done clear
  B)
   \[v\propto x\]
  done clear
  C)
    \[v\propto {{x}^{-\frac{1}{2}}}\]             
  done clear
  D)
    \[v\propto {{x}^{-1}}\]
  done clear
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• question_answer10) A uniform rope of length L and mass m1 hangs vertically from a rigid support. A block of mass \[{{m}_{2}}\]is attached to the free end of the rope. A transverse pulse of wavelength \[{{\lambda }_{1}}\] is produced at the lower end of the rope. The wavelength of the pulse when it reaches the top of the rope is \[{{\lambda }_{2}}.\] The ratio \[{{\lambda }_{2}}/{{\lambda }_{1}}\] is :
  A)
   \[\sqrt{\frac{{{m}_{1}}}{{{m}_{2}}}}\]                   
  done clear
  B)
   \[\sqrt{\frac{{{m}_{1}}+{{m}_{2}}}{{{m}_{2}}}}\]
  done clear
  C)
    \[\sqrt{\frac{{{m}_{2}}}{{{m}_{1}}}}\]                  
  done clear
  D)
    \[\sqrt{\frac{{{m}_{1}}+{{m}_{2}}}{{{m}_{1}}}}\]
  done clear
  View Answer play_arrow

• question_answer11) A refrigerator works between \[4{{\,}^{o}}C\] and \[30{{\,}^{o}}C.\] It is required to remove 600 calories of heat every second in order to keep the temperature of the refrigerated space constant. The power required is: (Take 1 cal = 4.2 Joules)                                                                                                                                                                
  A)
   2.365 W                              
  done clear
  B)
   23.65 W
  done clear
  C)
    236.5 W                             
  done clear
  D)
    2365 W
  done clear
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• question_answer12) An air column, closed at one end and open at the other, resonates with a tuning fork when the smallest length of the column is 50 cm. The next larger length of the column resonating with the same tuning fork is:
  A)
   66.7 cm                               
  done clear
  B)
    100 cm
  done clear
  C)
    150 cm                               
  done clear
  D)
    200 cm
  done clear
  View Answer play_arrow

• question_answer13) Consider the junction diode as ideal. The value of current flowing through AB is :                             
  A)
   \[0\,A\]                                              
  done clear
  B)
   \[{{10}^{-2}}A\]
  done clear
  C)
    \[{{10}^{-1}}A\]                             
  done clear
  D)
    \[{{10}^{-3}}A\]
  done clear
  View Answer play_arrow

• question_answer14) The charge flowing through a resistance R varies with time t as \[Q=at-b{{t}^{2}},\] where a and b are positive constants. The total heat produced in R is:                                                                                          
  A)
   \[\frac{{{a}^{3}}R}{6b}\]                                             
  done clear
  B)
   \[\frac{{{a}^{3}}R}{3b}\]
  done clear
  C)
    \[\frac{{{a}^{3}}R}{2b}\]                                            
  done clear
  D)
    \[\frac{{{a}^{3}}R}{b}\]
  done clear
  View Answer play_arrow

• question_answer15) A black body is at a temperature of 5760 K. The energy of radiation emitted by the body at wavelength 250 nm is\[{{\text{U}}_{\text{1}}}\text{,}\] at wavelength 500 nm is \[{{\text{U}}_{2}}\] and that at 1000 nm is \[{{\text{U}}_{3}}.\] Wien's constant, \[\text{b = 2}\text{.88  }\!\!\times\!\!\text{  1}{{\text{0}}^{\text{6}}}\text{ nmK}\text{.}\]Which of the following is correct?                                                                                                              
  A)
   \[{{\text{U}}_{1}}=0\]                  
  done clear
  B)
    \[{{\text{U}}_{3}}=0\]
  done clear
  C)
    \[{{\text{U}}_{\text{1}}}\text{ }{{\text{U}}_{\text{2}}}\]                            
  done clear
  D)
    \[{{\text{U}}_{2}}\text{ }{{\text{U}}_{1}}\]
  done clear
  View Answer play_arrow

• question_answer16) Coefficient of linear expansion of brass and steel rods are \[{{\alpha }_{1}}\] and \[{{\alpha }_{2}}.\] Lengths of brass and steel rods are \[{{\ell }_{1}}\]and \[{{\ell }_{.2}}\] respectively. If \[({{\ell }_{2}}-{{\ell }_{1}})\]is maintained same at all temperatures, which one of the following relations holds good?                                                                                                                                                    
  A)
   \[{{\alpha }_{1}}{{\ell }_{2}}={{\alpha }_{2}}{{\ell }_{1}}\]                             
  done clear
  B)
    \[{{\alpha }_{1}}\ell _{2}^{2}={{\alpha }_{2}}\ell _{1}^{2}\]
  done clear
  C)
    \[\alpha _{1}^{2}{{\ell }_{2}}=\alpha _{2}^{2}{{\ell }_{1}}\]                        
  done clear
  D)
    \[{{\alpha }_{1}}{{\ell }_{1}}={{\alpha }_{2}}{{\ell }_{2}}\]
  done clear
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• question_answer17) A npn transistor is connected in common emitter configuration in a given amplifier. A load resistance of \[800\,\Omega \]is connected in the collector circuit and the voltage drop across it is 0.8 V. If the current amplification factor is 0.96 and the input resistance of the circuit is \[192\Omega ,\]the voltage gain and the power gain of the amplifier will respectively be :                                                                                                                            
  A)
   4, 3.84                 
  done clear
  B)
    3.69, 3.84
  done clear
  C)
    4, 4                                      
  done clear
  D)
    4, 3.69
  done clear
  View Answer play_arrow

• question_answer18) The intensity at the maximum in a Young's double slit experiment is \[{{\text{I}}_{\text{0}}}\text{.}\]Distance between two slits is \[d=5\lambda ,\]where \[\lambda \]the wavelength of light is used in the experiment. What will be the intensity in front of one of the slits on the screen placed at a distance D = 10 d?                                                                  
  A)
   \[{{I}_{0}}\]                                      
  done clear
  B)
   \[\frac{{{I}_{0}}}{4}\]
  done clear
  C)
    \[\frac{3}{4}{{I}_{0}}\]                                
  done clear
  D)
    v
  done clear
  View Answer play_arrow

• question_answer19) A uniform circular disc of radius 50 cm at rest is free to turn about an axis which is perpendicular to its plane and passes through its centre. It is subjected to a torque which produces a constant angular acceleration of \[\text{2}\text{.0 rad }{{\text{s}}^{-2}}.\] Its net  acceleration in \[\text{m}{{\text{s}}^{-2}}\]at the end of 2.0 s is approximately :                               
  A)
   8.0                                        
  done clear
  B)
   7.0
  done clear
  C)
    6.0                                       
  done clear
  D)
   3.0
  done clear
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• question_answer20) An electron of mass m and a photon have same energy E. The ratio of de-Broglie wavelengths associated with them is :                                                                                                                                                          
  A)
   \[\frac{1}{c}{{\left( \frac{E}{2m} \right)}^{\frac{1}{2}}}\]                              
  done clear
  B)
    \[{{\left( \frac{E}{2m} \right)}^{\frac{1}{2}}}\]
  done clear
  C)
    \[c{{\left( 2mE \right)}^{\frac{1}{2}}}\]                
  done clear
  D)
    \[\frac{1}{xc}{{\left( \frac{2m}{E} \right)}^{\frac{1}{2}}}\] (being velocity of light)
  done clear
  View Answer play_arrow

• question_answer21) A disk and a sphere of same radius but different masses roll off on two inclined planes of the same altitude and length. Which one of the two objects gets to the bottom of the plane first?                       
  A)
   Disk
  done clear
  B)
   Sphere
  done clear
  C)
    Both reach at the same time
  done clear
  D)
    Depends on their masses
  done clear
  View Answer play_arrow

• question_answer22) The angle of incidence for a ray of light at a refracting surface of a prism is \[\text{4}{{\text{5}}^{\text{o}}}\text{.}\]The angle of prism is \[\text{6}{{\text{0}}^{\text{o}}}\text{.}\] If the ray suffers minimum deviation through the prism, the angle of minimum deviation and refractive index of the material of the prism respectively, are :                                                                                 
  A)
   \[\text{4}{{\text{5}}^{\text{o}}}\text{,}\,\frac{1}{\sqrt{2}}\]                     
  done clear
  B)
   \[{{30}^{\text{o}}}\text{,}\,\sqrt{2}\]
  done clear
  C)
    \[{{45}^{\text{o}}}\text{,}\,\sqrt{2}\]                  
  done clear
  D)
    \[{{30}^{\text{o}}}\text{,}\,\frac{1}{\sqrt{2}}\]
  done clear
  View Answer play_arrow

• question_answer23) When an \[\alpha -\]particle of mass 'm' moving with velocity 'v' bombards on a heavy nucleus of charge 'Ze', its distance of closest approach from the nucleus depends on m as :                                            
  A)
   \[\frac{1}{m}\]                                
  done clear
  B)
   \[\frac{1}{\sqrt{m}}\]
  done clear
  C)
   \[\frac{1}{{{m}^{2}}}\]                                 
  done clear
  D)
    m
  done clear
  View Answer play_arrow

• question_answer24) A particle of mass 10 g moves along a circle of radius 6.4 cm with a constant tang entail acceleration. What is the magnitude of this acceleration if the kinetic energy of the particle becomes equal to \[8\times {{10}^{4}}\text{ J}\] by the end of the second revolution after the beginning of the motion?                                               
  A)
   \[0.1\text{ }m/{{s}^{2}}\]                           
  done clear
  B)
   \[0.15\text{ }m/{{s}^{2}}\]
  done clear
  C)
    \[0.18\text{ }m/{{s}^{2}}\]                        
  done clear
  D)
    \[0.2\text{ }m/{{s}^{2}}\]
  done clear
  View Answer play_arrow

• question_answer25) The molecules o f a given mass o f a gas have r.m.s. velocity of \[\text{200}\,\text{m}{{\text{s}}^{-1}}\] at \[27{{\,}^{o}}C\]and \[1.0\times {{10}^{5}}\,\text{N}{{\text{m}}^{-2}}\] pressure. When the temperature and pressure of the gas are respectively, \[\text{127}{{\,}^{\text{o}}}\text{C}\]and\[\text{0}\text{.05}\times {{10}^{5}}\,\text{N}{{\text{m}}^{-2}},\] the r. m. s. velocity of its molecules in \[\text{m}{{\text{s}}^{1}}\]is :                                                                                                     
  A)
   \[100\sqrt{2}\]                
  done clear
  B)
   \[\frac{400}{\sqrt{3}}\]
  done clear
  C)
    \[\frac{100\sqrt{2}}{3}\]                            
  done clear
  D)
    \[\frac{100}{3}\]
  done clear
  View Answer play_arrow

• question_answer26) A long straight wire of radius a carries a steady current \[\text{I}\text{.}\]The current is uniformly distributed over its cross-section. The ratio of the magnetic fields B and B', at radial distances \[\frac{a}{2}\]and 2a respectively, from the axis of the wire is :                                                                                                                                                          
  A)
   \[\frac{1}{4}\]                                  
  done clear
  B)
   \[\frac{1}{2}\]
  done clear
  C)
    1                                           
  done clear
  D)
   4            
  done clear
  View Answer play_arrow

• question_answer27) A particle moves so that its position vector is given by \[\overrightarrow{r}=\cos \,\omega \text{ }t\,\widehat{x}+\sin \,\omega \,t\,\widehat{y}.\] Where \[\omega \] is a constant.  Which of the following is true?                                                                                                                
  A)
   Velocity and acceleration both are perpendicular to r \[\vec{r}.\]
  done clear
  B)
   Velocity and acceleration both are parallel to \[\vec{r}.\]
  done clear
  C)
    Velocity is perpendicular to \[\vec{r}.\]and acceleration is directed towards the origin
  done clear
  D)
    Velocity is perpendicular to \[\vec{r}.\]and acceleration is directed away from the origin
  done clear
  View Answer play_arrow

• question_answer28) What is the minimum velocity with which a body of mass m must enter a vertical loop of radius R so that it can complete the loop?                                                                                                                                       
  A)
   \[\sqrt{gR}\]                    
  done clear
  B)
   \[\sqrt{2gR}\]
  done clear
  C)
    \[\sqrt{3gR}\]                 
  done clear
  D)
   \[\sqrt{5gR}\]
  done clear
  View Answer play_arrow

• question_answer29) When a metallic surface is illuminated with radiation of wavelength \[\lambda ,\] the stopping potential is V. If the same surface is illuminated with radiation of wavelength \[2\lambda ,\] the stopping potential is \[\frac{V}{4}.\] The threshold wavelength for the metallic surface is :-                                                                                                           
  A)
   \[4\lambda \]                                  
  done clear
  B)
   \[5\lambda \]
  done clear
  C)
    \[\frac{5}{2}\lambda \]                                               
  done clear
  D)
    \[3\lambda \]
  done clear
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• question_answer30) A gas is compressed isothermally to half its initial volume. The same gas is compressed separately through an adiabatic process until its volume is again reduced to half. Then :-                                            
  A)
   Compressing the gas isothermally will require more work to be done.
  done clear
  B)
   Compressing the gas through adiabatic process will require more work to be done.
  done clear
  C)
   Compressing the gas isothermally or adiabatically will require the same amount of work.
  done clear
  D)
    Which of the case (whether compression through isothermal or through adiabatic process) requires more work will depend upon the atomicity of the gas.
  done clear
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• question_answer31) A potentiometer wire is 100 cm long and a constant potential difference is maintained across it. Two cells are connected in series first to support one another and then in opposite direction. The balance points are obtained at 50 cm and 10 cm from the positive end of the wire in the two cases. The ratio of emf's is :-                                                                                                                                                                                          
  A)
   5 : 1                                      
  done clear
  B)
   5 : 4
  done clear
  C)
   3 : 4                                      
  done clear
  D)
   3 : 2
  done clear
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• question_answer32) A astronomical telescope has objective and eyepiece of focal lengths 40 cm and 4 cm respectively. To view an object 200 cm away from the objective, the lenses must be separated by a distance :-
  A)
   37.3 cm                               
  done clear
  B)
   46.0 cm
  done clear
  C)
   50.0 cm                               
  done clear
  D)
   54.0 cm
  done clear
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• question_answer33) Two non-mixing liquids of densities \[\rho \] and\[n\rho (n>1)\] are put in a container. The height of each liquid is h. A solid cylinder of length L and density d is put in this container. The cylinder floats with its axis vertical and length \[pL(p<1)\]in the denser liquid. The density d is equal to :-                                                          
  A)
   \[\{1+(n+1)p\}\rho \]   
  done clear
  B)
   \[\{2+(n+1)p\}\rho \]
  done clear
  C)
   \[\{2+(n-1)p\}\rho \]    
  done clear
  D)
   \[\{1+(n-1)p\}\rho \]
  done clear
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• question_answer34) To get output 1 for the following circuit, the correct choice for the input is                           
  A)
   A = 0, B = 1, C = 0            
  done clear
  B)
   A = 1, B = 0, C = 0
  done clear
  C)
   A = 1, B = 1, C = 0            
  done clear
  D)
   A = 1, B = 0, C = 1
  done clear
  View Answer play_arrow

• question_answer35) A piece of ice falls from a height h so that it melts completely. Only one-quarter of the heat produced is absorbed by the ice and all energy of ice gets converted into heat during its fall. The value of h is :                                                                                                                                                                                 [Latent heat of ice is \[\text{3}\text{.4  }\!\!\times\!\!\text{  1}{{\text{0}}^{\text{5}}}\text{ J/kg}\]and g = 10 N/kg]
  A)
   34 km                  
  done clear
  B)
   544 km
  done clear
  C)
   136 km                                
  done clear
  D)
   68 km
  done clear
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• question_answer36) The ratio of escape velocity at earth \[({{v}_{e}})\] to the escape velocity at a planet \[({{v}_{p}})\] whose radius and mean density are twice as that of earth is :-                                                                                                        
  A)
   1 : 2                                      
  done clear
  B)
   \[1:2\sqrt{2}\]
  done clear
  C)
   1 : 4                                      
  done clear
  D)
   \[1:\sqrt{2}\]
  done clear
  View Answer play_arrow

• question_answer37) If the magnitude of sum of two vectors is equal to the magnitude of difference of the two vectors, the angle between these vectors is :-                                                                                                                        
  A)
   \[{{0}^{o}}\]                                     
  done clear
  B)
   \[{{90}^{o}}\]
  done clear
  C)
   \[{{45}^{o}}\]                                   
  done clear
  D)
   \[{{180}^{o}}\]
  done clear
  View Answer play_arrow

• question_answer38) Given the value of Rydberg constant is \[{{10}^{7}}{{\text{m}}^{-1}},\] the wave number of the last line of the Balmer series in hydrogen spectrum will be :-                                                                                                                    
  A)
   \[0.025\text{ }\times \text{ }{{10}^{4}}\text{ }{{m}^{1}}\]           
  done clear
  B)
   \[0.5\text{ }\times \text{ }{{10}^{7}}\text{ }{{m}^{1}}\]
  done clear
  C)
   \[0.25\text{ }\times \text{ }{{10}^{7}}\text{ }{{m}^{1}}\]             
  done clear
  D)
   \[2.5\text{ }\times \text{ }{{10}^{7}}\text{ }{{m}^{1}}\]
  done clear
  View Answer play_arrow

• question_answer39) A body of mass 1 kg begins to move under the action of a time dependent force \[\vec{F}=(2t\,\hat{i}\,+3{{t}^{2}}\hat{j})N,\]where\[\hat{i}\] and \[\hat{j}\]are unit vectors along x and y axis. What power will be developed by the force at the time t?
  A)
   \[(2{{t}^{2}}+3{{t}^{3}})W\]      
  done clear
  B)
   \[(2{{t}^{2}}+4{{t}^{4}})W\]
  done clear
  C)
   \[(2{{t}^{3}}+3{{t}^{4}})W\]      
  done clear
  D)
    \[(2{{t}^{3}}+3{{t}^{5}})W\]
  done clear
  View Answer play_arrow

• question_answer40) An inductor 20 mH, a capacitor \[50\mu F\] and a resistor \[\text{40}\,\Omega \] are connected in series across a source of emf V = 10 sin 340 t. The power loss in A.C. circuit is :-                                                                                
  A)
   0.51 W                
  done clear
  B)
   0.67 W
  done clear
  C)
   0.76 W                
  done clear
  D)
   0.89 W
  done clear
  View Answer play_arrow

• question_answer41) If the velocity of a particle is \[v=At=B{{t}^{2}},\] where A and B are constants, then the distance travelled by it between 1s and 2s is :-                                                                                                                                 
  A)
   \[\frac{3}{2}A+4B\]                       
  done clear
  B)
   \[3A+7B\]
  done clear
  C)
    \[\frac{3}{2}A+\frac{7}{3}B\]                   
  done clear
  D)
    \[\frac{A}{2}+\frac{B}{3}\]
  done clear
  View Answer play_arrow

• question_answer42) A long solenoid has 1000 turns. When a current of 4A flows through it, the magnetic flux linked with each turn of the solenoid is \[4\times {{10}^{-3}}\,\text{Wb}\text{.}\] The self-inductance of the solenoid is :-                    
  A)
   4H                                         
  done clear
  B)
   3H
  done clear
  C)
   2H                                         
  done clear
  D)
    1H
  done clear
  View Answer play_arrow

• question_answer43) A small signal voltage \[\text{V(t) = }{{\text{V}}_{\text{0}}}\,\sin \omega t\] is applied across an ideal capacitor C :-
  A)
   Current \[\text{I(t),}\] lags voltage V(t) by \[\text{9}{{\text{0}}^{o}}.\]
  done clear
  B)
   Over a full cycle the capacitor C does not consume any energy from the voltage source.
  done clear
  C)
   Current\[\text{I(t)}\] is in phase with voltage V(t).
  done clear
  D)
    Current \[\text{I(t)}\]leads voltage V(t) by \[\text{18}{{\text{0}}^{o}}.\]
  done clear
  View Answer play_arrow

• question_answer44) Match the corresponding entries of column-1 with coloumn-2 (Where m is the magnification produced by the mirror) :-

  Column-I	Column-II
  A. \[m = - 2\]	a. Convex mirror
  B. \[m=-\frac{1}{2}\]	b. Concave mirror
  C. \[m = + 2\]	c. Real image
  D. \[m=+\frac{1}{2}\]	d. Virtual image

                                                                                                                                                                 
  A)
   A \[\to \] b and c, B \[\to \] b and c, C \[\to \]b and d, D \[\to \] a and d.
  done clear
  B)
   A \[\to \] a and c, B \[\to \] a and d, C \[\to \] a and b, D \[\to \] c and d
  done clear
  C)
   A \[\to \] a and d, B \[\to \] b and c, C\[\to \] b and d, D \[\to \] b and c
  done clear
  D)
    A \[\to \] c and d, B \[\to \] b and d, C \[\to \] b and c, D \[\to \] a and d
  done clear
  View Answer play_arrow

• question_answer45) A car is negotiating a curved road of radius R. The road is banked at an angle \[\theta .\] the coefficient of friction between the tyres of the car and the road is \[{{\mu }_{s}}.\]The maximum safe velocity on this road is :-
  A)
   \[\sqrt{g{{R}^{2}}\frac{{{u}_{s}}+\tan \theta }{1-{{\mu }_{s}}\tan \theta }}\]     
  done clear
  B)
   \[\sqrt{gR\frac{{{u}_{s}}+\tan \theta }{1-{{\mu }_{s}}\tan \theta }}\]
  done clear
  C)
   \[\sqrt{\frac{g}{R}\frac{{{u}_{s}}+\tan \theta }{1-{{\mu }_{s}}\tan \theta }}\]    
  done clear
  D)
   \[\sqrt{\frac{g}{{{R}^{2}}}\frac{{{u}_{s}}+\tan \theta }{1-{{\mu }_{s}}\tan \theta }}\]
  done clear
  View Answer play_arrow

• question_answer46) Consider the molecules \[\text{C}{{\text{H}}_{\text{4}}}\text{,N}{{\text{H}}_{\text{3}}}\]and \[{{\text{H}}_{\text{2}}}\text{O}\text{.}\]Which of the given statements is false?           
  A)
   The H -C-H bond angle in \[C{{H}_{4}},\]the H-N- bond angle in \[\text{N}{{\text{H}}_{\text{3}}}\text{,}\]and the H-O-H bond angle in \[{{\text{H}}_{\text{2}}}\text{O}\]ar all greater than \[\text{9}{{\text{0}}^{o}}\]
  done clear
  B)
   The H-O-H bond angle in \[{{\text{H}}_{\text{2}}}\text{O}\]is larger than the H-C-H bond angle in \[\text{C}{{\text{H}}_{\text{4}}}.\]
  done clear
  C)
   The H-O-H bond angle in \[{{\text{H}}_{\text{2}}}\text{O}\]is smaller than the H-N-H bond angle in \[\text{N}{{\text{H}}_{\text{3}}}\text{.}\]
  done clear
  D)
   The H-C-H bond angle in \[\text{C}{{\text{H}}_{4}}\]is larger than the H-N-H bond angle in \[\text{N}{{\text{H}}_{\text{3}}}\text{.}\]
  done clear
  View Answer play_arrow

• question_answer47) In the reaction \[H-C\equiv CH\frac{(1)NaN{{H}_{2}}/liq.N{{H}_{3}}}{(2)C{{H}_{3}}C{{H}_{2}}Br}X\frac{(1)NaN{{H}_{2}}/liq.N{{H}_{3}}}{(2)C{{H}_{3}}C{{H}_{2}}Br}Y\]X and Y are:                                                           
  A)
   X = 1-Butyne; Y = 3-Hexyne
  done clear
  B)
   X = 2-Butyne; Y = 3-Hexyne
  done clear
  C)
    X = 2-Butyne; Y = 2-Hexyne
  done clear
  D)
    X = 1-Butyne; Y = 2-Hexyne
  done clear
  View Answer play_arrow

• question_answer48) Among the following, the correct order of acidity is                                                                        
  A)
   \[HCl{{O}_{3}}\text{ }<\text{ }HCl{{O}_{4}}\text{ }<\text{ }HCl{{O}_{2}}\text{ }<\text{ }HClO\]
  done clear
  B)
   \[~HClO\text{ }<\text{ }HCl{{O}_{2}}\text{ }<\text{ }HCl{{O}_{3}}\text{ }<\text{ }HCl{{O}_{4}}\]
  done clear
  C)
    \[HCl{{O}_{2}}\text{ }<\text{ }HClO\text{ }<\text{ }HCl{{O}_{3}}\text{ }<\text{ }HCl{{O}_{4}}\]
  done clear
  D)
    \[HCl{{O}_{4}}\text{ }<\text{ }HCl{{O}_{2\text{ }}}<\text{ }HClO\text{ }<\text{ }HCl{{O}_{3}}\]
  done clear
  View Answer play_arrow

• question_answer49) The rat e of a first -order react ion is \[\text{0}\text{.04}\,\text{mol}\,{{\ell }^{-1}}{{s}^{-1}}\]at 10 seconds and \[0.03\,\text{mol }{{\ell }^{-1}}{{s}^{-1}}\]at 20 seconds after initiation of the reaction. The half-life period of the reaction is:                                                         
  A)
   24.1 s                   
  done clear
  B)
   34.1 s
  done clear
  C)
    44.1 s                  
  done clear
  D)
    54.1 s
  done clear
  View Answer play_arrow

• question_answer50) Which one of the following characteristics is associated with adsorption?                             
  A)
   \[\Delta G\]is negative but \[\Delta H\]and \[\Delta S\]are positive
  done clear
  B)
   \[\Delta G,\Delta H\]and \[\Delta S\]all are negative
  done clear
  C)
    \[\Delta G\] and \[\Delta H\]are negative but\[\Delta S\] is positive
  done clear
  D)
    \[\Delta G\] and \[\Delta S\] are negative but \[\Delta H\]is positive
  done clear
  View Answer play_arrow

• question_answer51) In which of the following options the order of arrangement does not agree with the variation of property indicated against it?                                                                                                                                           
  A)
   \[A{{l}^{3+}}<M{{g}^{2+}}<N{{a}^{+}}<{{F}^{-}}\] (increasing ionic size)
  done clear
  B)
   B < C < N < O (increasing first ionisation enthalpy)
  done clear
  C)
    \[I\text{ }<\text{ }Br\text{ }<\text{ }Cl\text{ }<\text{ }F\] (increasing electron gain enthalpy)
  done clear
  D)
    \[Li\text{ }<\text{ }Na\text{ }<\text{ }K\text{ }<\text{ }Rb\] (increasing metallic radius)
  done clear
  View Answer play_arrow

• question_answer52) Which of the following statements is false?                                                                                        
  A)
   \[\text{M}{{\text{g}}^{\text{2+}}}\]ions form a complex with ATP
  done clear
  B)
   \[\text{C}{{\text{a}}^{\text{2+}}}\]ions are important in blood clotting
  done clear
  C)
   \[\text{C}{{\text{a}}^{\text{2+}}}\]ions are not important in maintaining the regular beating of the heart.
  done clear
  D)
   \[\text{M}{{\text{g}}^{\text{2+}}}\]ions are important in the green parts of plants.
  done clear
  View Answer play_arrow

• question_answer53) Which of the following statements about hydrogen is incorrect?                                                              
  A)
   hydrogen has three isotopes of which tritium is the most common.
  done clear
  B)
   Hydrogen never acts as cation in ionic salts
  done clear
  C)
    Hydronium ion, \[{{\text{H}}_{\text{3}}}{{\text{O}}^{\text{+}}}\]exists freely in solution
  done clear
  D)
    Dihydrogen does not act as a reducing agent
  done clear
  View Answer play_arrow

• question_answer54) The correct statement regarding a carbonyl compound with a hydrogen atom on its alpha carbon, is :-                                                                                                                                                                                   
  A)
   a carbonyl compound with a hydrogen atom on its alpha-carbon never equilibrates with its corresponding enol.
  done clear
  B)
   a carbonyl compound with a hydrgen atom on its alpha-carbon rapidly equilibrates with its corresponding enol and this process is known as aldehyde-ketone equilibration.
  done clear
  C)
   a carbonyl compound with a hydrogen atom on its alpha-carbon rapidly equilibrates with its corresponding enol and this process is known as carbonylation.
  done clear
  D)
   a carbonyl compound with a hydrogen atom on its alpha-carbon rapidly equilibrates with its corresponding enol and this process is known as keto-enol tautomerism.
  done clear
  View Answer play_arrow

• question_answer55) MY and \[\text{N}{{\text{Y}}_{3}},\]two nearly insoluble salts, have the same \[{{K}_{sp}}\]values of \[6.2\text{ }\times \text{ }{{10}^{13}}\] at room temperature. Which statement would be true in regard to MY and\[\text{N}{{\text{Y}}_{3}}\]?                                                              
  A)
   The molar solubilities of MY and \[\text{N}{{\text{Y}}_{\text{3}}}\]in water are identical.
  done clear
  B)
   The molar solubility of MY in water is less than that of \[\text{N}{{\text{Y}}_{\text{3}}}\]
  done clear
  C)
   The salts MY and \[\text{N}{{\text{Y}}_{\text{3}}}\]are more soluble in 0.5 M KY than in pure water.
  done clear
  D)
    The addition of the salt of KY to solution of MY and \[\text{N}{{\text{Y}}_{\text{3}}}\]will have no effect on their solubilities.
  done clear
  View Answer play_arrow

• question_answer56) In a protein molecule various amino acids are linked together by:                                            
  A)
   \[\alpha -\] glycosidic bond
  done clear
  B)
   \[\beta -\]glycosidic bond
  done clear
  C)
   peptide bond
  done clear
  D)
   dative bond
  done clear
  View Answer play_arrow

• question_answer57) Natural rubber has                                                                                                                                         
  A)
   All cis-configuration
  done clear
  B)
   All trans-configuration
  done clear
  C)
    Alternate cis-and trans-configuration
  done clear
  D)
    Random cis-and trans-configuration
  done clear
  View Answer play_arrow

• question_answer58) Match items of Column I with the items of Column II and asign the correct code :            

  	Column - I		Column - II
  (A)	Cyanide process	(I)	Ultrapure Ge
  (B)	Froth floatation process	(II)	Dressing of ZnS
  (C)	Electrolytic reduction	(III)	Extraction of Al
  (A)	Zone refining	(iv)	Extraction of Au
  		(v)	Purification of Ni

  Code:
  A)
                                                  (A)-(iv)                 (B)-(ii)                   (C)-(iii)                  (D)-(i)
  done clear
  B)
  (A)-(ii)                   (B)-(iii)                  (C)-(i)                    (D)-(v)
  done clear
  C)
  (A)-(i)                    (B)-(ii)                   (C)-(iii)                  (D)-(iv)
  done clear
  D)
  (A)-(iii)                  (B)-(iv)                  (C)-(v)                   (D)-(i)
  done clear
  View Answer play_arrow

• question_answer59) Which one of the following statements is correct when \[\text{S}{{\text{O}}_{\text{2}}}\]is passed through acidified \[{{\text{K}}_{2}}C{{r}_{2}}{{O}_{7}}\]solution?                                                                                                                                                                
  A)
   The solution turns blue
  done clear
  B)
   The solution is decolourized
  done clear
  C)
    \[\text{S}{{\text{O}}_{\text{2}}}\]is reduced
  done clear
  D)
    Green \[C{{r}_{2}}{{(S{{O}_{4}})}_{3}}\]is formed
  done clear
  View Answer play_arrow

• question_answer60) The electronic configurations of Eu(Atomic No 63), Gd(Atomic No 64) and Tb (Atomic No. 65) are
  A)
  \[[Xe]4{{f}^{7}}6{{s}^{2}},\text{  }\!\![\!\!\text{ }Xe\text{ }\!\!]\!\!\text{ }4{{f}^{8}}\text{ }6{{s}^{2}}\]and  \[[Xe]4{{f}^{8}}5{{d}^{1}}6{{s}^{2}}\]
  done clear
  B)
   \[[Xe]4{{f}^{7}}5{{d}^{1}}6{{s}^{2}},\text{  }\!\![\!\!\text{ }Xe\text{ }\!\!]\!\!\text{ }4{{f}^{7}}\text{ }5{{d}^{1}}\text{ }6{{s}^{2}}\]and  \[[Xe]4{{f}^{9}}6{{s}^{2}}\]
  done clear
  C)
    \[[Xe]4{{f}^{6}}5{{d}^{1}}6{{s}^{2}},\text{  }\!\![\!\!\text{ }Xe\text{ }\!\!]\!\!\text{ }4{{f}^{7}}5d16{{s}^{2}}\]and  \[[Xe]4{{f}^{8}}5{{d}^{1}}6{{s}^{2}}\]
  done clear
  D)
    \[[Xe]4{{f}^{7}}6{{s}^{2}},\text{  }\!\![\!\!\text{ }Xe\text{ }\!\!]\!\!\text{ }4{{f}^{7}}5{{d}^{1}}6{{s}^{2}}\]and  \[[Xe]4{{f}^{9}}6{{s}^{2}}\]
  done clear
  View Answer play_arrow

• question_answer61) Two electrons occupying the same orbital are distinguished by                                                 
  A)
   Principal quantum number
  done clear
  B)
   Magnetic quantum number
  done clear
  C)
    Azimuthal quantum number
  done clear
  D)
    Spin quantum number
  done clear
  View Answer play_arrow

• question_answer62) Which copper is heated with conc. \[\text{HN}{{\text{O}}_{\text{3}}}\] it produces
  A)
   \[\text{Cu}{{\left( \text{N}{{\text{O}}_{\text{3}}} \right)}_{\text{2}}}\]and \[\text{N}{{\text{O}}_{\text{2}}}\]
  done clear
  B)
    \[\text{Cu}{{\left( \text{N}{{\text{O}}_{\text{3}}} \right)}_{\text{2}}}\] and NO
  done clear
  C)
    \[\text{Cu}{{\left( \text{N}{{\text{O}}_{\text{3}}} \right)}_{\text{2}}},\]NO and \[\text{N}{{\text{O}}_{\text{2}}}\]
  done clear
  D)
    \[\text{Cu}{{\left( \text{N}{{\text{O}}_{\text{3}}} \right)}_{\text{2}}}\]and \[\text{N}{{\text{O}}_{\text{2}}}\]
  done clear
  View Answer play_arrow

• question_answer63) Which of the following reagents would distinguish cis-cyclopenta-1,2-diol from the trans-isomer?           
  A)
   Acetone                                             
  done clear
  B)
    Ozone
  done clear
  C)
    \[\text{Mn}{{\text{O}}_{\text{2}}}\]                   
  done clear
  D)
   Aluminium isopropxide
  done clear
  View Answer play_arrow

• question_answer64) The correct thermodynamic conditions for the spontaneous reaction at all temperatures is
  A)
   \[\Delta H<0\]and \[\Delta S=0\]            
  done clear
  B)
   \[\Delta H>0\]and \[\Delta S<0\]
  done clear
  C)
    \[\Delta H<0\]and \[\Delta S>0\]
  done clear
  D)
    \[\Delta H<0\]and \[\Delta S<0\]
  done clear
  View Answer play_arrow

• question_answer65) Lithium has a bcc structure. Its density is \[530\,\text{kg}\,{{\text{m}}^{-3}}\] and its atomic mass is \[6.94\text{ g mo}{{\text{l}}^{1~}}\]Calculate the edge length of a unit cell of Lithium metal.                                                                                                   \[({{N}_{A}}=\text{ }6.02\text{ }\times \text{ }{{10}^{23}}\text{ mo}{{\text{l}}^{1}})\]
  A)
   154 pm                               
  done clear
  B)
    352 pm
  done clear
  C)
    527 pm                              
  done clear
  D)
    264 pm
  done clear
  View Answer play_arrow

• question_answer66) Which one of the following orders is correct for the bond dissociation enthalpy of halogen molecules?                                                                                                                                                                                  
  A)
   \[{{I}_{2}}>\text{ }B{{r}_{2}}>\text{ }C{{l}_{2}}>{{F}_{2}}\]
  done clear
  B)
    \[C{{l}_{2}}>\text{ }B{{r}_{2}}>\text{ }{{F}_{2}}>\text{ }{{I}_{2}}\]
  done clear
  C)
    \[B{{r}_{2}}>\text{ }{{I}_{2}}>\text{ }{{F}_{2}}>\text{ }C{{l}_{2}}\]
  done clear
  D)
    \[{{F}_{2}}>\text{ }C{{l}_{2}}>\text{ }B{{r}_{2}}>\text{ }{{I}_{2}}\]
  done clear
  View Answer play_arrow

• question_answer67) Which of the following is an analgesic?                                                                                                  
  A)
   Novalgin                            
  done clear
  B)
    Penicillin
  done clear
  C)
   Streptomycin   
  done clear
  D)
    Chloromycetin
  done clear
  View Answer play_arrow

• question_answer68) Equal moles of hydrogen and oxygen gases are placed in a container with a pin-hole through which both can escape. What fraction of the oxygen escapes in the time required for one-half of the hydrogen to escape?
  A)
   1/8                                       
  done clear
  B)
   ¼
  done clear
  C)
    3/8                                      
  done clear
  D)
    ½
  done clear
  View Answer play_arrow

• question_answer69) Consider the nitration of benzene using mixed conc. \[{{\text{H}}_{\text{2}}}\text{S}{{\text{O}}_{\text{4}}}\]and \[\text{HN}{{\text{O}}_{\text{3}}}\text{.}\]If a large amount of \[\text{KHS}{{\text{O}}_{\text{4}}}\]is added to the mixture, the rate of nitration will be:-                                                                    
  A)
   faster                  
  done clear
  B)
   slower
  done clear
  C)
    unchanged                      
  done clear
  D)
    doubled
  done clear
  View Answer play_arrow

• question_answer70) Predict the correct order among the following:-                                                                               
  A)
   lone pair- lone pair > lone pair - bond pair bond pair - bond pair
  done clear
  B)
   lone pair - lone pair > bond pair - bond pair lone pair - bond pair
  done clear
  C)
    bond pair - bond pair > lone pair - bond  pair lone pair - lone pair
  done clear
  D)
    lone pair - bond pair > bond pair - bond pair lone pair - lone pair
  done clear
  View Answer play_arrow

• question_answer71) The product obtained as a result of a reaction of nitrogen with \[\text{Ca}{{\text{C}}_{\text{2}}}\] is :-                  
  A)
   \[Ca{{(CN)}_{2}}\]                         
  done clear
  B)
   \[CaCN\]
  done clear
  C)
    \[CaC{{N}_{3}}\]                            
  done clear
  D)
   \[C{{a}_{2}}CN\]
  done clear
  View Answer play_arrow

• question_answer72) Consider the following liquid - vapour equilibrium. \[\text{Liquid }\text{Vapour}\] Which of the following relations is correct?
  A)
  \[\frac{d\ell nG}{d{{T}^{2}}}=\frac{\Delta {{ }_{v}}}{R{{T}^{2}}}\]      
  done clear
  B)
   \[\frac{d\ell nP}{dT}=\frac{-\Delta {{ }_{v}}}{RT}\]
  done clear
  C)
    \[\frac{d\ell nP}{d{{T}^{2}}}=\frac{-\Delta {{ }_{v}}}{{{T}^{2}}}\]      
  done clear
  D)
    \[\frac{d\ell nP}{dT}=\frac{\Delta {{ }_{v}}}{R{{T}^{2}}}\]
  done clear
  View Answer play_arrow

• question_answer73) Match the compounds given in column I with the hybridisation and shape given in column II and mark the correct option.                                                                                                                                                

  Column-I		Column -II
  (A)	\[Xe{{F}_{6}}\]	(i)	Distorted octahedral
  (B)	\[Xe{{O}_{3}}\]	(ii)	Square planar
  (C)	\[XeO{{F}_{4}}\]	(iii)	Pyramidal
  (D)	\[Xe{{F}_{4}}\]	(iv)	Square pyramidal

  A)
  (A)-(i)                    (B)-(iii)                  (C)- (iv)                 (D)-(ii)
  done clear
  B)
  (A)-(i)                    (B)-(ii)                   (C)- (iv)                 (D)-(iii)
  done clear
  C)
  (A)-(iv)                 (B)-(iii)                  (C)- (i)                   (D)-(ii)
  done clear
  D)
  (A)-(iv)                 (B)-(i)                    (C)- (ii)                  (D)-(iii)
  done clear
  View Answer play_arrow

• question_answer74) Which of the following has longest C-O bond length? (Free C-O bond length in Co is\[1.128\overset{\text{o}}{\mathop{\text{A}}}\,\]).

  Note:- Since metal atom is carrying maximum -ve charge therefore it would show maximum synergic bonding as sa resultant C-O bond length would be maximum.

  A)
   \[Ni{{(CO)}_{4}}\]                          
  done clear
  B)
   \[{{[Co{{(CO)}_{4}}]}^{\text{O}-}}\]
  done clear
  C)
   \[{{[Fe{{(CO)}_{4}}]}^{2-}}\]                     
  done clear
  D)
    \[{{[Mn{{(CO)}_{6}}]}^{+}}\]
  done clear
  View Answer play_arrow

• question_answer75) The pressure of \[{{\text{H}}_{\text{2}}}\]required to make the potential of \[{{\text{H}}_{\text{2}}}-\]electrode zero in pure water at 298 K is :-                                                                                                                                                                                 
  A)
   \[{{10}^{14}}\text{ atm}\]                          
  done clear
  B)
   \[{{10}^{12}}\text{ atm}\]
  done clear
  C)
    \[{{10}^{-10}}\text{atm}\]                        
  done clear
  D)
    \[{{10}^{-4}}\text{atm}\]
  done clear
  View Answer play_arrow

• question_answer76) The addition of a catalyst during a chemical reaction alters which of the following quantities?
  A)
   Entropy
  done clear
  B)
   Internal energy
  done clear
  C)
    Enthalpy
  done clear
  D)
    Activation energy
  done clear
  View Answer play_arrow

• question_answer77) The ionic radii of \[{{\text{A}}^{\text{+}}}\]and \[{{\text{B}}^{}}\]ions are \[0.98\text{ }\times \text{ }10{{}^{10}}\text{m}\]and \[1.81\text{ }\times \text{ }{{10}^{10}}\text{ m}.\] The coordination number of each ion in AB is :-                                                                                                                                                 
  A)
   6                                            
  done clear
  B)
    4
  done clear
  C)
    8                                           
  done clear
  D)
    2
  done clear
  View Answer play_arrow

• question_answer78) Which is the correct statement for the given acids?                                                                        
  A)
   Phosphinic acid is a diprotic acid while phosphonic acid is a monoprotic acid
  done clear
  B)
   Phosphinic acid is a monoprotic acid while phosphonic acid is a diprotic acid
  done clear
  C)
   Both are triprotic acids
  done clear
  D)
    Both are diprotic acids
  done clear
  View Answer play_arrow

• question_answer79) Fog is colloidal solution of :-                                                                                                                        
  A)
   Liquid in gas                      
  done clear
  B)
   Gas in liquid
  done clear
  C)
    Solid in gas                       
  done clear
  D)
    Gas in gas
  done clear
  View Answer play_arrow

• question_answer80) Which of the following statement about the composition of the vapour over an ideal a 1 : 1 molar mixture of benzene and toluene is correct?  Assume that the temperature is constant at \[\text{25}{{\,}^{\text{o}}}\text{C}\text{.}\] (Given : Vapour Pressure Data at \[\text{25}{{\,}^{\text{o}}}\text{C,}\] benzene = 12.8 kPa, Toluene = 3.85 kPa)                                              
  A)
   The vapour will contain a higher percentage of benzene
  done clear
  B)
   The vapour will contain a higher percentage of toluene
  done clear
  C)
    The vapour will contain equal amounts of benezene and toluene
  done clear
  D)
    Not enough information is given to make a predication
  done clear
  View Answer play_arrow

• question_answer81) The correct statement regarding the comparison of staggered and eclipsed conformation of ethane, is :-                                                                                                                                                                                
  A)
   The staggered conformation of ethane is less stable than eclipsed conformation, because staggered conformation has torsional strain
  done clear
  B)
   The eclipsed conformation of ethane is more stable than staggered conformation, because eclipsed conformation has no torsional strain
  done clear
  C)
   The eclipsed conformation of ethane is more stable than staggered conformation even through the eclipsed conformation has torsional strain
  done clear
  D)
   The staggered conformation of ethane is more stable than eclipsed conformation, because staggered conformation has no torsional strain.
  done clear
  View Answer play_arrow

• question_answer82) The reaction Can be classified as:-                                                                                                                                     
  A)
   Williamson ether synthesis reaction
  done clear
  B)
   Alcohol formation reaction
  done clear
  C)
    Dehydration reaction
  done clear
  D)
    Williamson alcohol synthesis reaction
  done clear
  View Answer play_arrow

• question_answer83) The product formed by the reaction of an aldehyde with a primary amine is :-                   
  A)
   Schiff base                        
  done clear
  B)
   Ketone
  done clear
  C)
    Carboxylic acid
  done clear
  D)
    Aromatic acid
  done clear
  View Answer play_arrow

• question_answer84) Which of the following biphenyls is optically active?
  A)
         
  done clear
  B)
   
  done clear
  C)
  
  done clear
  D)
             
  done clear
  View Answer play_arrow

• question_answer85) For the following reactions:-      

  A. \[~C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}Br\text{ }+\text{ }KOH\to \] \[C{{H}_{3}}CH=C{{H}_{2}}+KBr\text{ }+\text{ }{{H}_{2}}O\]

  B.

  C.

  Which of the following statements is correct?
  A)
  (A) and (b) are elimination reaction and (C) is addition reaction
  done clear
  B)
  (A) is elimination, (B) is substitution and (C) is addition reaction
  done clear
  C)
  (A) is elimination, (B) and (C) are substitution reactions
  done clear
  D)
  (A) is substitution, (B) and (C) are addition reaction
  done clear
  View Answer play_arrow

• question_answer86) At \[{{100}^{o}}C\] the vapour pressure of a solution of 6.5g of a solute in 100 g water is 732 mm. If \[{{K}_{b}}=0.52,\] the boiling point of this solution will be :-                                                                                                      
  A)
   \[{{101}^{o}}C\]                              
  done clear
  B)
   \[{{100}^{o}}C\]
  done clear
  C)
    \[{{102}^{o}}C\]                             
  done clear
  D)
    \[{{103}^{o}}C\]
  done clear
  View Answer play_arrow

• question_answer87) The correct statement regarding RNA and DNA, respectively is:                                                
  A)
   The sugar component in RNA is arabinose and the sugar component in DNA is 2'-deoxyribose.
  done clear
  B)
   The sugar component in RNA is ribose and the sugar component in DNA is 2'-deoxyribose.
  done clear
  C)
    The sugar component in RNA is arabinose
  done clear
  D)
    The sugar component in RNA is 2'-deoxyribose and the sugar component in DNA is arabinose.
  done clear
  View Answer play_arrow

• question_answer88) The correct statement regarding the basicity of aryl amines is :-                                                
  A)
   Aryl amines are generally less basic than alkyl amines because the nitrogen lone-pair electrons are delocalized by interaction with the aromatic ring electron system.
  done clear
  B)
   Arylamines are generally more basic than alkylamines because the nitrogen lone-pair electrons are not delocalized by interaction with the aromatic ring  electron system.
  done clear
  C)
   Arylamines are generally more basic than alkylamines because of aryl group.
  done clear
  D)
   Arylamines are generally more basic than alkylamines, because the nitrongen atom in arylamines is sp-hybridized.
  done clear
  View Answer play_arrow

• question_answer89) Which one given below is a non-reducing sugar?                                                                                              
  A)
   Maltose                             
  done clear
  B)
   Lactose
  done clear
  C)
    Glucose                             
  done clear
  D)
    Sucrose
  done clear
  View Answer play_arrow

• question_answer90) The pair of electron in the given carbanion, \[C{{H}_{3}}C\equiv {{C}^{\,\text{O-}}},\]is present in which of the following orbitals?                                                                                                                                                                                          
  A)
   2p                                         
  done clear
  B)
   \[s{{p}^{3}}\]
  done clear
  C)
    \[s{{p}^{2}}\]                                  
  done clear
  D)
    sp
  done clear
  View Answer play_arrow

• question_answer91) Gause's principle of competitive exclusion states that:
  A)
  More abundant species will exclude the less abundant species through competition
  done clear
  B)
  Competition for the same resources excludes species having different food preferences
  done clear
  C)
  No two species can occupy the same niche indefinitely for the same limiting resources
  done clear
  D)
  Larger organisms exclude smaller ones through competition
  done clear
  View Answer play_arrow

• question_answer92) The two polypeptides of human insulin are linked together by:
  A)
  Hydrogen bonds
  done clear
  B)
  Phosphodiester bond
  done clear
  C)
  Covalent bond
  done clear
  D)
  Disulphide bridges
  done clear
  View Answer play_arrow

• question_answer93) The coconut water from tender coconut represents:
  A)
  Endocarp
  done clear
  B)
  Fleshy mesocarp
  done clear
  C)
  Free nuclear proembryo
  done clear
  D)
  Free nuclear endosperm
  done clear
  View Answer play_arrow

• question_answer94) Which of the following statements is wrong for viroids?
  A)
   They lack a protein coat
  done clear
  B)
   They are smaller than viruses
  done clear
  C)
   They cause infections
  done clear
  D)
   Their RNA is of high molecular weight
  done clear
  View Answer play_arrow

• question_answer95) Which of the following features is not present in the Phylum - Arthropoda?
  A)
   Chitinous exoskeleton
  done clear
  B)
   Metameric segmentation
  done clear
  C)
   Parapodia
  done clear
  D)
   Jointed appendages
  done clear
  View Answer play_arrow

• question_answer96) Which of the following most appropriately describes hemophilia?
  A)
   Recessive gene disorder
  done clear
  B)
   X - linked recessive gene disorder
  done clear
  C)
   Chromosomal disorder
  done clear
  D)
   Dominant gene disorder
  done clear
  View Answer play_arrow

• question_answer97) Emerson's enhancement effect and Red drop have been instrumental in the discovery of:
  A)
   Photophosphorylation and non - cyclic electron transport
  done clear
  B)
   Two photosystems operating simultaneously
  done clear
  C)
   Photophosphorylation and cyclic electron transport
  done clear
  D)
   Oxidative phosphorylation
  done clear
  View Answer play_arrow

• question_answer98) In which of the following, all three are macronutrients?
  A)
   Boron, zinc, manganese
  done clear
  B)
   Iron, copper, molybdenum
  done clear
  C)
   Molybdenum, magnesium, manganese
  done clear
  D)
   Nitrogen, nickel, phosphorus
  done clear
  View Answer play_arrow

• question_answer99) Name the chronic respiratory disorder caused mainly by cigarette smoking:
  A)
   Emphysema
  done clear
  B)
   Asthma
  done clear
  C)
   Respiratory acidosis
  done clear
  D)
   Respiratory alkalosis
  done clear
  View Answer play_arrow

• question_answer100) A system of rotating crops with legume or grass pasture to improve soil structure and fertility is called:
  A)
   Ley farming
  done clear
  B)
   Contour farming
  done clear
  C)
   Strip farming
  done clear
  D)
   Shifting agriculture
  done clear
  View Answer play_arrow

• question_answer101) Mitochondria and chloroplast are:

  (i) Semi - autonomous organelles

  (ii) Formed by division of pre - existing organelles and they contain DNA but lack protein synthesizing machinery

  Which one of the following options is correct?
  A)
   Both (i) and (ii) are correct
  done clear
  B)
   (ii) is true but (i) is false
  done clear
  C)
   (i) is true but (ii) is false
  done clear
  D)
   Both (i) and (ii) are false
  done clear
  View Answer play_arrow

• question_answer102) In context of Amniocentesis, which of the following statement is incorrect?
  A)
   It is usually done when a woman is between 14 - 16 weeks pregnant
  done clear
  B)
   It is used for prenatal sex determination
  done clear
  C)
   It can be used for detection of Down syndrome
  done clear
  D)
   It can be used for detection of Cleft palate
  done clear
  View Answer play_arrow

• question_answer103) In a chloroplast the highest number of protons are found in:
  A)
   Stroma
  done clear
  B)
   Lumen of thylakoids
  done clear
  C)
   Inter membrane space
  done clear
  D)
   Antennae complex
  done clear
  View Answer play_arrow

• question_answer104) Photosensitive compound in human eye is made up of:
  A)
   Guanosine and Retinol
  done clear
  B)
   Opsin and Retinal
  done clear
  C)
   Opsin and Retinol
  done clear
  D)
   Guanosine and Retinol
  done clear
  View Answer play_arrow

• question_answer105) Spindle fibres attach on to:
  A)
   Telomere of the chromosome
  done clear
  B)
   Kinetochore of the chromosome
  done clear
  C)
   Centromere of the chromosome
  done clear
  D)
   Kinetosome of the chromosome
  done clear
  View Answer play_arrow

• question_answer106) Which is the National Aquatic Animal of India?
  A)
   Gangetic shark
  done clear
  B)
   River dolphin
  done clear
  C)
   Blue whale                        
  done clear
  D)
   Sea - horse
  done clear
  View Answer play_arrow

• question_answer107) Which of the following is required as inducer(s) for the expression of Lac operon?
  A)
   Glucose
  done clear
  B)
   Galactose
  done clear
  C)
   Lactose
  done clear
  D)
   Lactose and galactose
  done clear
  View Answer play_arrow

• question_answer108) Which of the following pairs of hormones are not antagonistic (having opposite effects) to each other?
  A)
   Parathormone-Calcitonin
  done clear
  B)
   Insulin-Glucagon
  done clear
  C)
   Aldosterone-Atrial Natriuretic Factor
  done clear
  D)
   Relaxin-Inhibin
  done clear
  View Answer play_arrow

• question_answer109) Microtubules are the constituents of:
  A)
   Cilia, Flagella and Peroxisomes
  done clear
  B)
   Spindle fibres, centrioles and cilia
  done clear
  C)
   Centrioles, spindle fibres and chromatin
  done clear
  D)
   Centrosome, Nucleosome and Centrioles
  done clear
  View Answer play_arrow

• question_answer110) A complex of ribosomes attached to single strand of RNA is known as:
  A)
   Polysome                          
  done clear
  B)
   Polymer
  done clear
  C)
   Polypeptide                     
  done clear
  D)
   Okazaki fragment
  done clear
  View Answer play_arrow

• question_answer111) Fertilization in humans is practically feasible only if:
  A)
   The sperms are transported into vagina just after the release of ovum in fallopian tube
  done clear
  B)
   The ovum and sperms are transported simultaneously to ampullary - isthmic junction of the fallopian tube
  done clear
  C)
   The ovum and sperms are transported simultaneously to ampullary - isthmic junction of the cervix
  done clear
  D)
   The sperms are transported into cervix within 48 hrs. of release of ovum in uterus
  done clear
  View Answer play_arrow

• question_answer112) Asthma may be attributed to:
  A)
   Bacterial infection of the lungs
  done clear
  B)
   Allergic reaction of the mast cells in the lungs
  done clear
  C)
   Inflammation of the trachea
  done clear
  D)
   Accumulation of fluid in the lung
  done clear
  View Answer play_arrow

• question_answer113) The avena curvature is used for bioassay of:
  A)
   \[ABA\]
  done clear
  B)
   \[G{{A}_{3}}\]
  done clear
  C)
   \[IAA\]
  done clear
  D)
   Ethylene
  done clear
  View Answer play_arrow

• question_answer114) The standard petal of papilionaceous corolla is also called:
  A)
   Carina                 
  done clear
  B)
   Pappus
  done clear
  C)
   Vexillum                            
  done clear
  D)
   Corona
  done clear
  View Answer play_arrow

• question_answer115) Tricarpellary, syncarpous gynoecium is found in flowers of:
  A)
   Liliaceae
  done clear
  B)
   Solanaceae
  done clear
  C)
   Fabaceae
  done clear
  D)
   Poaceae
  done clear
  View Answer play_arrow

• question_answer116) One of the major components of cell wall of most fungi is:
  A)
   Chitin
  done clear
  B)
   Peptidoglycan
  done clear
  C)
   Cellulose
  done clear
  D)
   Hemicellulose
  done clear
  View Answer play_arrow

• question_answer117) Select the incorrect statement:
  A)
  FSH stimulates the sertoli cells which help in spermiogenesis
  done clear
  B)
   LH triggers ovulation in ovary
  done clear
  C)
   LH and FSH decrease gradually during the follicular phase
  done clear
  D)
   LH triggers secretion of androgens from the Leydig cells
  done clear
  View Answer play_arrow

• question_answer118) In meiosis crossing over is initiated at:
  A)
   Pachytene
  done clear
  B)
   Leptotene
  done clear
  C)
   Zygotene
  done clear
  D)
   Diplotene
  done clear
  View Answer play_arrow

• question_answer119) A tall true breeding garden pea plant is crossed with a dwarf true breeding garden pea plant. When the \[{{F}_{1}}\] plants were selfed the resulting genotypes were in the ratio
  A)
   1 : 2 : 1 :: Tall homozygous : Tall heterozygous : Dwarf
  done clear
  B)
  1 : 2 : 1 :: Tall heterozygous : Tall homozygous : Dwarf
  done clear
  C)
   3 : 1 :: Tall : Dwarf
  done clear
  D)
   3 : 1 :: Dwarf : Tall
  done clear
  View Answer play_arrow

• question_answer120) Which of the following is the most important cause of animals and plants being driven to extinction?
  A)
   Over - exploitation
  done clear
  B)
   Alien species invasion
  done clear
  C)
   Habitat loss and fragmentation
  done clear
  D)
   Co - extinctions
  done clear
  View Answer play_arrow

• question_answer121) Which one of the following is a characteristic feature of cropland ecosystem?
  A)
   Absence of soil organisms
  done clear
  B)
   Least genetic diversity
  done clear
  C)
   Absence of weeds
  done clear
  D)
   Ecological succession
  done clear
  View Answer play_arrow

• question_answer122) Changes in \[GnRH\] pulse frequency in females is controlled by circulating levels of:
  A)
   Estrogen and progesterone
  done clear
  B)
   Estrogen and inhibin
  done clear
  C)
   Progesterone only
  done clear
  D)
   Progesterone and inhibin
  done clear
  View Answer play_arrow

• question_answer123) Which of the following is not a feature of the plasmids?
  A)
   Independent replication
  done clear
  B)
   Circular structure
  done clear
  C)
   Transferable
  done clear
  D)
   Single - stranded
  done clear
  View Answer play_arrow

• question_answer124) Which of the following features is not present in Periplaneta americana?
  A)
   Schizocoelom as body cavity
  done clear
  B)
   Indeterminate and radial cleavage during embryonic development
  done clear
  C)
   Exoskeleton composed of N - acetylglucosamine
  done clear
  D)
   Metamerically segmented body
  done clear
  View Answer play_arrow

• question_answer125) In higher vertebrates, the immune system can distinguish self - cells and non - self. If this property is lostdue to genetic abnormality and it attacks self - cells, then it leads to:
  A)
   Allergic response
  done clear
  B)
   Graft rejection
  done clear
  C)
   Auto - immune disease
  done clear
  D)
   Active immunity
  done clear
  View Answer play_arrow

• question_answer126) 

  Column-I		Column-II
  (A)	Dominance	(i)	Many genes govern a single character
  (B)	Condominance	(ii)	In a heterozygous organism only one allele express itself
  (C)	Pleiotropy	(iii)	In a heterozygous organism both alleles express themselves fully
  (D)	Polygenic inheritance	(iv)	A single gene influences many characters

   
  A)

  A-ii

  B-i

  C-iv

  D-iii

   
  done clear
  B)

  A-ii

  B-iii

  C-iv

  D-i

   
  done clear
  C)

  A-iv

  B-i

  C-ii

  D-iii

   
  done clear
  D)

  A-iv

  B-iii

  C-i

  D-ii

   
  done clear
  View Answer play_arrow

• question_answer127) Joint Forest Management Concept was introduced in India during:
  A)
   1960s                   
  done clear
  B)
   1970s
  done clear
  C)
   1980s                   
  done clear
  D)
   990s
  done clear
  View Answer play_arrow

• question_answer128) Pick out the correct statements: (i) Hemophilia is a sex - linked recessive disease (ii) Down?s syndrome is due to aneuploidy (iii) Phenylketonuria is an autosomal recessive gene disorder (iv) Sickle cell anaemia is an autosomal recessive gene disorder
  A)
   (i) and (iv) are correct
  done clear
  B)
   (ii) and (iv) are correct
  done clear
  C)
   (i), (iii) and (iv) are correct
  done clear
  D)
   (i), (ii) and (iii) are correct
  done clear
  View Answer play_arrow

• question_answer129) Which one of the following statements is wrong?
  A)
   Cyanobacteria are also called blue - green algae
  done clear
  B)
   Golden algae are also called desmids
  done clear
  C)
   Eubacteria are also called false bacteria
  done clear
  D)
   Phycomycetes are also called algal fungi
  done clear
  View Answer play_arrow

• question_answer130) Proximal end of the filament of stamen is attached to the:
  A)
   Anther                
  done clear
  B)
   Connective
  done clear
  C)
   Placenta                             
  done clear
  D)
   Thalamus or petal
  done clear
  View Answer play_arrow

• question_answer131) Which of the following approaches does not give the defined action of contraceptive?
  A)

  Barrier methods

  Prevent fertilization

  done clear
  B)

  Intra uterine devices

  Increase phagocytosis of sperms, supress sperm motility and fertilizing capacity of sperms

  done clear
  C)

  Hormonal contraceptives

  Prevent/retard entry of sperms, prevent ovulation and fertilization

  done clear
  D)

  Vasectomy

  Prevents spermatogenesis

  done clear
  View Answer play_arrow

• question_answer132) The taq polymerase enzyme is obtained from:
  A)
   Thermus aquaticus
  done clear
  B)
   Thiobacillus ferroxidans
  done clear
  C)
   Bacillus subtilis
  done clear
  D)
   Pseudomonas putida
  done clear
  View Answer play_arrow

• question_answer133) Identify the correct statement on ?inhibin?:
  A)
   Inhibits the secretion of LH, FSH and Prolactin
  done clear
  B)
   Is produced by granulose cells in ovary and inhibits the secretion of FSH
  done clear
  C)
   Is produced by granulose cells in ovary and inhibits the secretion of LH
  done clear
  D)
   Is produced by nurse cells in testes and inhibits the secretion of LH
  done clear
  View Answer play_arrow

• question_answer134) Which part of the tobacco plant is infected by Meloidogyne incognita?
  A)
   Flower                
  done clear
  B)
   Leaf
  done clear
  C)
   Stem                                   
  done clear
  D)
   Root
  done clear
  View Answer play_arrow

• question_answer135) Antivenom injection contains preformed antibodies while polio drops that are administered into the bodycontain:
  A)
   Activated pathogens
  done clear
  B)
   Harvested antibodies
  done clear
  C)
   Gamma globulin
  done clear
  D)
   Attenuated pathogens
  done clear
  View Answer play_arrow

• question_answer136) Which one of the following cell organelles is enclosed by a single membrane?
  A)
   Mitochondria                   
  done clear
  B)
   Chloroplasts
  done clear
  C)
   Lysosomes                        
  done clear
  D)
   Nuclei
  done clear
  View Answer play_arrow

• question_answer137) Lack of relaxation between successive stimuli in sustained muscle contraction is known as:
  A)
   Spasm                 
  done clear
  B)
   Fatigue
  done clear
  C)
   Tetanus                              
  done clear
  D)
   Tonus
  done clear
  View Answer play_arrow

• question_answer138) Which of the following is not a stem modification?
  A)
   Pitcher of Nepenthes
  done clear
  B)
   Thorns of citrus
  done clear
  C)
   Tendrils of cucumber
  done clear
  D)
   Flattened structures of Opuntia
  done clear
  View Answer play_arrow

• question_answer139) Water soluble pigments found in plant cell vacuoles are:
  A)
   Xanthophylls                    
  done clear
  B)
   Chlorophylls
  done clear
  C)
   Carotenoids                     
  done clear
  D)
  Anthocyanins
  done clear
  View Answer play_arrow

• question_answer140) Select the correct statement:
  A)
   Gymnosperms are both homosporous and heterosporous
  done clear
  B)
   Salvinia, ginkgo and pinus all are gymnosperms
  done clear
  C)
   Sequoia is one of the tallest trees
  done clear
  D)
   The leaves of gymnosperms are not well adapted to extremes of climate
  done clear
  View Answer play_arrow

• question_answer141) Which of the following is not required for any of the techniques of DNA fingerprinting available at present?
  A)
   Polymerase chain reaction
  done clear
  B)
   Zinc finger analysis
  done clear
  C)
   Restriction enzymes
  done clear
  D)
   DNA - DNA hybridization
  done clear
  View Answer play_arrow

• question_answer142) Which type of tissue correctly matches with its location?
  A)

  Tissue	Location
  Smooth muscle	Wall of intestine

  done clear
  B)

  Tissue	Location
  Areolar tissue	Tendons

  done clear
  C)

  Tissue	Location
  Transitional epithelium	Tip of nose

  done clear
  D)

  Tissue	Location
  Cuboidal epithelium	Lining of stomach

  done clear
  View Answer play_arrow

• question_answer143) A plant in your garden avoids photo respiratory losses, has improved water use efficiency, shows high rates of photosynthesis at high temperatures and has improved efficiency of nitrogen utilization. In which of the following physiological groups would you assign this plant?
  A)
  \[{{C}_{3}}\]                                      
  done clear
  B)
  \[{{C}_{4}}\]
  done clear
  C)
  \[CAM\]                              
  done clear
  D)
  Nitrogen fixer
  done clear
  View Answer play_arrow

• question_answer144) Which of the following structures is homologus to the wing of a bird?
  A)
   Dorsal fin of a shark      
  done clear
  B)
   Wing of a moth
  done clear
  C)
   Hind limb of rabbit         
  done clear
  D)
   Flipper of whale
  done clear
  View Answer play_arrow

• question_answer145) Which of the following characteristic features always holds true for the corresponding group of animals?
  A)

  Cartilaginous endoskeleton

  Chondrichthyes

  done clear
  B)

  Viviparous

  Mammalia

  done clear
  C)

  Posses a mouth with an upper and a lower jaw

  Chordata

  done clear
  D)

  3 - chambered heart with one incompletely divided ventricle

  Reptilia

  done clear
  View Answer play_arrow

• question_answer146) Which of the following statements is not true for cancer cells in relation to mutations?
  A)
   Mutations in proto - oncogenes accelerate the cell cycle
  done clear
  B)
   Mutations destroy telomerase inhibitor
  done clear
  C)
   Mutations inactivate the cell control
  done clear
  D)
   Mutations inhibit production of telomerase
  done clear
  View Answer play_arrow

• question_answer147) The amino acid Tryptophan is the precursor for the synthesis of:
  A)
   Melatonin and Serotonin
  done clear
  B)
   Thyroxine and Triiodothyronine
  done clear
  C)
   Estrogen and Progesterone
  done clear
  D)
   Cortisol and Cortisone
  done clear
  View Answer play_arrow

• question_answer148) Following are the two statements regarding the origin of life: (i) The earliest organisms that appeared on the earth were non-green and presumably anaerobes. (ii) The first autotrophic organisms were the chemoautotrophs that never released oxygen. Of the above statements which one of the following options is correct?
  A)
   (i) is correct but (ii) is false
  done clear
  B)
   (ii) is correct but (i) is false
  done clear
  C)
   Both (i) and (ii) are correct
  done clear
  D)
   Both (i) and (ii) are false
  done clear
  View Answer play_arrow

• question_answer149) Reduction in pH of blood will:
  A)
   Reduce the rate of heart beat
  done clear
  B)
   Reduce the blood supply to the brain
  done clear
  C)
   Decrease the affinity of hemoglobin with oxygen
  done clear
  D)
   Release bicarbonate ions by the liver
  done clear
  View Answer play_arrow

• question_answer150) Analogous structures are a result of:
  A)
   Divergent evolution
  done clear
  B)
   Convergent evolution
  done clear
  C)
   Shared ancestry
  done clear
  D)
   Stabilizing selection
  done clear
  View Answer play_arrow

• question_answer151) Which of the following is a restriction endonuclease?
  A)
   Hind II
  done clear
  B)
   Protease
  done clear
  C)
   DNase I
  done clear
  D)
   RNase
  done clear
  View Answer play_arrow

• question_answer152) The term ecosystem was coined by:
  A)
   E.P. Odum                         
  done clear
  B)
   A.G. Tansley
  done clear
  C)
   E. Haeckel                         
  done clear
  D)
   E. Warming
  done clear
  View Answer play_arrow

• question_answer153) Which one of the following statements is wrong?
  A)
   Sucrose is a disaccharide
  done clear
  B)
   Cellulose is a polysaccharide
  done clear
  C)
   Uracil is a pyrimidine
  done clear
  D)
   Glycine is a sulphur containing amino acid
  done clear
  View Answer play_arrow

• question_answer154) In bryophytes and pteridophytes, transport of male gametes requires:
  A)
   Wind                   
  done clear
  B)
   Insects
  done clear
  C)
   Birds                                    
  done clear
  D)
   Water
  done clear
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• question_answer155) When does the growth rate of a population following the logistic model equal zero? The logistic model is given as\[dN/dt=rN(1-N/K)\]:
  A)
   When \[N/K\] is exactly one
  done clear
  B)
   When \[N\] nears the carrying capacity of the habitat
  done clear
  C)
   When \[N/K\] equals zero
  done clear
  D)
   When death rate is greater than birth rate
  done clear
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• question_answer156) Which one of the following statements is not true?
  A)
   Tapetum helps in the dehiscence of anther
  done clear
  B)
   Exine of pollen grains is made up of sporopollenin
  done clear
  C)
   Pollen grains of many species cause severe allegies
  done clear
  D)
   Stored pollen in liquid nitrogen can be used in the crop breeding programmes
  done clear
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• question_answer157) Which of the following would appear as the pioneer organisms on bare rocks?
  A)
   Lichens                               
  done clear
  B)
   Liverworts
  done clear
  C)
   Mosses                              
  done clear
  D)
   Green algae
  done clear
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• question_answer158) Which one of the following is the starter codon?
  A)
   AUG                                    
  done clear
  B)
   UGA
  done clear
  C)
   UAA                                     
  done clear
  D)
   UAG
  done clear
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• question_answer159) Which one of the following characteristics is not shared by birds and mammals?
  A)
   Ossified endoskeleton
  done clear
  B)
   Breathing using lungs
  done clear
  C)
   Viviparity
  done clear
  D)
   Warm blooded nature
  done clear
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• question_answer160) Nomenclature is governed by certain universal rules. Which one of the following is contrary to the rules of nomenclature?
  A)
   Biological names can be written in any language
  done clear
  B)
   The first words in a biological name represents the genus name, and the second is a specific epithet
  done clear
  C)
   The names are written in Latin and are italicized
  done clear
  D)
   When written by hand, the names are to be underlined
  done clear
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• question_answer161) Blood pressure in the pulmonary artery is:
  A)
   Same as that in the aorta
  done clear
  B)
   More than that in the carotid
  done clear
  C)
   More than that in the pulmonary vein
  done clear
  D)
   Less than that in the venae cavae
  done clear
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• question_answer162) Cotyledon of maize grain is called:
  A)
   Plumule
  done clear
  B)
   Coleorhiza
  done clear
  C)
   Coleoptile
  done clear
  D)
   Scutellum
  done clear
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• question_answer163) In the stomach, gastric acid is secreted by the:
  A)
   Gastrin secreting cells
  done clear
  B)
   Parietal cells
  done clear
  C)
   Peptic cells
  done clear
  D)
   Acidic cells
  done clear
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• question_answer164) Depletion of which gas in the atmosphere can lead to an increased incidence of skin cancers:
  A)
   Nitrous oxide                   
  done clear
  B)
   Ozone
  done clear
  C)
   Ammonia                          
  done clear
  D)
   Methane
  done clear
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• question_answer165) Chrysophytes, Euglenoids, Dinoflagellates and Slime moulds are included in the kingdom:
  A)
   Monera                              
  done clear
  B)
   Protista
  done clear
  C)
   Fungi                   
  done clear
  D)
   Animalia
  done clear
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• question_answer166) Water vapour comes out from the plant leaf through the stomatal opening. Through the same stomatalopening carbon dioxide diffuses into the plant during photosynthesis. Reason out the above statements using oneof following options:
  A)
   Both processes cannot happen simultaneously
  done clear
  B)
   Both processes can happen together because the diffusion coefficient of water and \[C{{O}_{2}}\] is different
  done clear
  C)
   The above processes happen only during night time
  done clear
  D)
   One process occurs during day time, and the other at night
  done clear
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• question_answer167) In mammals, which blood vessel would normally carry largest amount of urea?
  A)
   Renal vein                         
  done clear
  B)
   Dorsal aorta
  done clear
  C)
   Hepatic vein                     
  done clear
  D)
   Hepatic portal vein
  done clear
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• question_answer168) Seed formation without fertilization in flowering plants involves the process of:
  A)
   Sporulation                       
  done clear
  B)
   Budding
  done clear
  C)
   Somatic hybridization   
  done clear
  D)
   Apomixis
  done clear
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• question_answer169) Which of the following is wrongly matched in the given table?
  A)

  Microbe	Product	Application
  Trichoderma polysporum	Cyclosporin A	Immunosuppressive drug

  done clear
  B)

  Microbe	Product	Application
  Monascus purpureus	Statins	Lowering of blood cholesterol

  done clear
  C)

  Microbe	Product	Application
  Streptococcus	Streptokinase	Removal of clot from blood vessel

  done clear
  D)

  Microbe	Product	Application
  Clostridium butylicum	Lipase	Removal of oil stains

  done clear
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• question_answer170) In a testcross involving 𝐹1 dihybrid flies, more parental - type offspring were produced than the recombinant-type offspring. This indicates:
  A)
   The two genes are located on two different chromosomes
  done clear
  B)
   Chromosomes failed to separate during meiosis
  done clear
  C)
   The two genes are linked and present on the same chromosome
  done clear
  D)
   Both of the characters are controlled by more than one gene
  done clear
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• question_answer171) It is much easier for a small animal to run uphill than for a large animal, because:
  A)
   It is easier to carry a small body weight.
  done clear
  B)
   Smaller animals have a higher metabolic rate.
  done clear
  C)
   Small animals have a lower \[{{O}_{2}}\] requirement
  done clear
  D)
   The efficiency of muscles in large animals is less than in the small animals.
  done clear
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• question_answer172) Which of the following is not a characteristic feature during mitosis in somatic cells?
  A)
   Spindle fibres
  done clear
  B)
   Disappearance of nucleolus
  done clear
  C)
   Chromosome movement
  done clear
  D)
   Synapsis
  done clear
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• question_answer173) Which of the following statements is not correct?
  A)
   Pollen grains of many species can germinate on the stigma of a flower, but only one pollen tube of the same species grows into the style.
  done clear
  B)
   Insects that consume pollen or nectar without bringing about pollination are called pollen / nerctar robbers.
  done clear
  C)
   Pollen germination and pollen tube growth are regulated by chemical components of pollen interacting with those of the pistil.
  done clear
  D)
   Some reptiles have also been reported as pollinators in some plant species.
  done clear
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• question_answer174) Specialized epidermal cells surrounding the guard cells are called:
  A)
   Complementary cells   
  done clear
  B)
   Subsidiary cells
  done clear
  C)
   Bulliform cells  
  done clear
  D)
   Lenticels
  done clear
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• question_answer175) Which of the following guards the opening of hepatopancreatic duct into the duodenum?
  A)
   Semilunar valve
  done clear
  B)
   Ileocaecal valve
  done clear
  C)
   Pyloric sphincter
  done clear
  D)
   Sphincter of Oddi
  done clear
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• question_answer176) Stems modified into flat green organs performing the functions of leaves are known as:
  A)
   Cladodes
  done clear
  B)
   Phyllodes
  done clear
  C)
   Phylloclades
  done clear
  D)
   Scales
  done clear
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• question_answer177) The primitive prokaryotes responsible for the production of biogas from the dung of ruminant animals, include the:
  A)
   Halophiles
  done clear
  B)
   Thermoacidophiles
  done clear
  C)
   Methanogens
  done clear
  D)
   Eubacteria
  done clear
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• question_answer178) A river with an inflow of domestic sewage rich in organic waste may result in:
  A)
   Drying of the river very soon due to algal bloom.
  done clear
  B)
   Increased population of aquatic food web organisms.
  done clear
  C)
   An increased production of fish due to biodegradable nutrients.
  done clear
  D)
   Death of fish due to lack of oxygen.
  done clear
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• question_answer179) A cell at telophase stage is observed by a student in a plant brought from the field. He tells his teacher that thi scell is not like other cells at telophase stage. There is no formation of cell plate and thus the cell is containing more number of chromosomes as compared to other dividing cells. This would result in:
  A)
   Aneuploidy                       
  done clear
  B)
   Polyploidy
  done clear
  C)
   Somaclonal variation    
  done clear
  D)
   Polyteny
  done clear
  View Answer play_arrow

• question_answer180) A typical fat molecules is made up of:
  A)
   Three glycerol molecules and one fatty acid molecules
  done clear
  B)
   One glycerol and three fatty acid molecules
  done clear
  C)
   One glycerol and one fatty acid molecule
  done clear
  D)
   Three glycerol and three fatty acid molecules
  done clear
  View Answer play_arrow