Solved papers for NEET AIPMT SOLVED PAPER SCREENING 2010

done AIPMT SOLVED PAPER SCREENING 2010 Total Questions - 200

• question_answer1) A block of mass m is in contact with the cart C as shown in the figure. The coefficient of static friction between the block and the cart is \[\mu \]. The acceleration a of the cart that will prevent the block from falling satisfies
  A)
  \[\alpha >\frac{mg}{\mu }\]                       
  done clear
  B)
  \[\alpha >\frac{g}{\mu m}\]
  done clear
  C)
  \[\alpha \ge \frac{g}{\mu }\]                     
  done clear
  D)
  \[\alpha <\frac{g}{\mu }\]
  done clear
  View Answer play_arrow

• question_answer2) The mass of a \[_{\text{3}}^{\text{7}}\] Li nucleus is 0.042u less than the sum of the masses of all its nucleons. The binding energy per nucleon of \[_{\text{3}}^{\text{7}}\]Li nucleus is nearly
  A)
                                          46 MeV                               
  done clear
  B)
  5.6 MeV                              
  done clear
  C)
  3.9 MeV              
  done clear
  D)
         23 MeV
  done clear
  View Answer play_arrow

• question_answer3) A circular disk of moment of inertia \[{{\text{I}}_{\text{t}}}\] is rotating in a horizontal plane, about its symmetry axis, with a constant angular speed \[{{\omega }_{\text{t}}}.\]Another disk of moment of inertia \[{{\text{I}}_{\text{b}}}\]is dropped coaxially onto the rotating disk. Initially the second disk has zero angular speed. Eventually both the disks rotate with a constant angular speed \[{{\omega }_{f}}.\]The energy lost by the initially rotating disc due to friction is
  A)
  \[\frac{1}{2}\frac{I_{b}^{2}}{({{I}_{t}}+{{I}_{b}})}\omega _{i}^{2}\]         
  done clear
  B)
  \[\frac{1}{2}\frac{I_{t}^{2}}{({{I}_{t}}+{{I}_{b}})}\omega _{i}^{2}\]
  done clear
  C)
         \[\frac{1}{2}\frac{{{I}_{b}}-{{I}_{t}}}{({{I}_{t}}+{{I}_{b}})}\omega _{i}^{2}\]
  done clear
  D)
         \[\frac{1}{2}\frac{{{I}_{b}}{{I}_{t}}}{({{I}_{t}}+{{I}_{b}})}\omega _{i}^{2}\]
  done clear
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• question_answer4) Which one of the following statement is false?
  A)
  Pure Si doped with trivalent impurities gives a p-type semiconductor
  done clear
  B)
  Majority carriers in a n-type semiconductor are holes
  done clear
  C)
  Minority carriers in a p-type semiconductor are electrons
  done clear
  D)
  The resistance of intrinsic semiconductor decreases with increase of temperature
  done clear
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• question_answer5) The displacement of a particle along the x axis is given by \[x=a{{\sin }^{2}}\omega t\]. The motion of the particle corresponds to
  A)
  simple harmonic motion of frequency \[\omega /\pi \]
  done clear
  B)
  simple harmonic motion of frequency\[3\omega /2\pi \]
  done clear
  C)
  non simple harmonic motion
  done clear
  D)
  simple harmonic motion of frequency \[\omega /2\pi \]
  done clear
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• question_answer6) The radii of circular orbits of two satellites A and B of the earth are 4R and R, respectively. If the speed of satellite A is 3v, then the speed of satellite B will be
  A)
  3v/4                                      
  done clear
  B)
  6v                          
  done clear
  C)
         12 v                       
  done clear
  D)
         3v/2
  done clear
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• question_answer7) A beam of cathode rays is subjected to crossed Electric (X) and Magnetic fields (B). The fields are adjusted such that the beam is not deflected. The specific charge of the cathode rays is given by (where V is the potential difference between cathod and anode)
  A)
  \[\frac{{{B}^{2}}}{2V{{E}^{2}}}\]               
  done clear
  B)
         \[\frac{2V{{B}^{2}}}{{{E}^{2}}}\]               
  done clear
  C)
         \[\frac{2V{{E}^{2}}}{{{B}^{2}}}\]               
  done clear
  D)
         \[\frac{2{{E}^{2}}}{2V{{B}^{2}}}\]
  done clear
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• question_answer8) A ball is dropped 'from a high rise platform at t = 0 starting from rest. After 6 s another ball is thrown downwards from the same platform with a speed v. The two balls meet at t = 18 s. What is the value of v ? (take \[g=10\,m{{s}^{-2}}\])
  A)
  \[\text{74}\,\text{m}{{\text{s}}^{-2}}\]                
  done clear
  B)
  \[55\,\text{m}{{\text{s}}^{-1}}\]              
  done clear
  C)
         \[40\,\text{m}{{\text{s}}^{-1}}\]              
  done clear
  D)
         \[60\,\text{m}{{\text{s}}^{-1}}\]
  done clear
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• question_answer9) A ray of light travelling in a transparent medium of refractive index \[\mu \] falls, on a surface separating the medium from air at an angle of incidence of 45°. For which of the following value of \[\mu \] the ray can undergo total internal reflection?
  A)
  \[\mu =1.33\]                   
  done clear
  B)
  \[\mu =1.40\]
  done clear
  C)
  \[\mu =1.50\]   
  done clear
  D)
         \[\mu =1.25\]
  done clear
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• question_answer10) The period of oscillation of a mass M suspended from a spring of negligible mass is T. If along with it another mass M is also suspended, the period of oscillation will now be
  A)
   T            
  done clear
  B)
                         \[T/\sqrt{2}\]
  done clear
  C)
  2 T                         
  done clear
  D)
         \[\sqrt{2}T\]
  done clear
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• question_answer11) A cylindrical metallic rod in thermal contact with two reservoirs of heat at its two ends conducts an amount of heat Q in time t. The metallic rod is melted and the material is formed into a rod of half the radius of the original rod. What is the amount of heat conducted by the new rod when placed in thermal contact with the two reservoirs in time t?
  A)
  Q/4        
  done clear
  B)
                        Q/16     
  done clear
  C)
         2Q                         
  done clear
  D)
         Q/2
  done clear
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• question_answer12) A ball moving with velocity \[\text{2}\,\text{m}{{\text{s}}^{\text{-1}}}\]collides head on with another stationary ball of double the mass. If the coefficient of restitution is 0.5, then their velocities (in\[\,\text{m}{{\text{s}}^{\text{-1}}}\]) after collision will be
  A)
                                          0, 1 
  done clear
  B)
                                         1, 1                        
  done clear
  C)
         1, 0.5                    
  done clear
  D)
         0, 2
  done clear
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• question_answer13) A transverse wave is represented by \[y=A\sin \]\[(\omega t-kx).\] For what value of the wavelength is the wave velocity equal to the maximum particle velocity?
  A)
  \[\pi A/2\]          
  done clear
  B)
         \[\pi A\]
  done clear
  C)
  \[2\pi A\]                            
  done clear
  D)
         \[A\]
  done clear
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• question_answer14) A particle has initial velocity \[(3\mathbf{\hat{i}}+4\mathbf{\hat{j}})\] and has acceleration \[(0.1\mathbf{\hat{i}}+0.3\mathbf{\hat{j}})\]. Its speed after 10 s is
  A)
  7 unit
  done clear
  B)
                                         \[7\sqrt{2}\] unit             
  done clear
  C)
         8.5 unit                
  done clear
  D)
         10 unit
  done clear
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• question_answer15) An engine pumps water through a hose pipe. Water passes through the pipe and leaves it with a velocity of \[\text{2}\,\text{m}{{\text{s}}^{\text{-1}}}\]. The mass per unit length of water in the pipe is 100\[\,\text{kg}{{\text{m}}^{\text{-1}}}\]. What is the power of the engine?
  A)
  400 W                                   
  done clear
  B)
  200 W   
  done clear
  C)
         100 W                   
  done clear
  D)
         800 W
  done clear
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• question_answer16) A thin ring of radius R metre has charge q coulomb uniformly spread on it. The ring rotates about its axis with a constant frequency of f revolution/s. The value of magnetic induction in Wb \[\,{{\text{m}}^{\text{-2}}}\] at the centre of the ring is
  A)
  \[\frac{{{\mu }_{0}}qf}{2\pi R}\]               
  done clear
  B)
         \[\frac{{{\mu }_{0}}q}{2\pi f\,R}\]           
  done clear
  C)
         \[\frac{{{\mu }_{0}}\,q}{2f\,R}\]                               
  done clear
  D)
  \[\frac{{{\mu }_{0}}\,q\,f}{2\,R}\]
  done clear
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• question_answer17) Which one of the following bonds produces a solid that reflects light in the visible region and whose electrical conductivity decreases with temperature and has high melting point?
  A)
  metallic bonding
  done clear
  B)
  van der Waals' bonding
  done clear
  C)
  ionic bonding
  done clear
  D)
  covalent bonding
  done clear
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• question_answer18) A particle moves a distance x in time t according to equation \[x={{(t+5)}^{-1}}\]. The acceleration of particle is proportional to
  A)
  (velocity)\[^{3/2}\]    
  done clear
  B)
         (distance)2              
  done clear
  C)
             (distance)\[^{-2}\]     
  done clear
  D)
         (velocity)\[^{\text{2/3}}\]
  done clear
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• question_answer19) A conducting circular loop is placed in a uniform magnetic field, B = 0.025 T with its plane perpendicular to the loop. The radius of the loop is made to shrink at a constant rate of \[\text{1}\,\text{m}{{\text{m}}^{\text{s-1}}}\]. The induced emf when the radius is 2 cm, is
  A)
  \[\text{2}\,\text{V}\]
  done clear
  B)
                         \[\,\text{V}\]
  done clear
  C)
  \[\frac{\pi }{2}\,\text{V}\]          
  done clear
  D)
         \[\text{2}\,\text{V}\]
  done clear
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• question_answer20) The activity of a radioactive sample is measured as \[{{N}_{0}}\] counts per minute at t = 0 and \[{{N}_{0}}/e\] counts per minute at t = 5 min. The time (in minute) at which the activity reduces to half its value is
  A)
  \[\text{lo}{{\text{g}}_{\text{e}}}\text{2/5}\]     
  done clear
  B)
         \[\frac{\text{5}}{\text{lo}{{\text{g}}_{\text{e}}}\text{2}}\]         
  done clear
  C)
         \[5{{\log }_{10}}2\]                         
  done clear
  D)
  \[5{{\log }_{e}}2\]
  done clear
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• question_answer21) Two particles which are initially at rest, move towards each other under the action of their internal attraction. If their speeds are v and 2v at any instant, then the speed of centre of mass of the system will be
  A)
  2v        
  done clear
  B)
                         0                             
  done clear
  C)
         1.5v                       
  done clear
  D)
         v
  done clear
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• question_answer22) A particle of mass M is situated at the centre of a spherical shell of same mass and radius a. The gravitational potential at a point situated at a/2 distance from the centre, will be
  A)
  \[-\frac{3GM}{a}\]
  done clear
  B)
                         \[-\frac{2GM}{a}\]
  done clear
  C)
  \[-\frac{GM}{a}\]            
  done clear
  D)
         \[-\frac{4GM}{a}\]
  done clear
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• question_answer23) The device that can act as a complete electronic circuit is
  A)
  Junction diode
  done clear
  B)
  Integrated circuit
  done clear
  C)
  Junction transistor          
  done clear
  D)
  Zener diode
  done clear
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• question_answer24) A potentiometer circuit is set up as shown. The potential gradient across the potentiometer wire, is k volt/cm and the ammeter, present in the circuit, reads 1.0 A when two way key is switched off. The balance points, when the key between the terminals (i) 1 and 2 (ii) 1 and 3, is plugged in, are found to be at lengths \[{{\text{l}}_{\text{1}}}\text{cm}\] and \[{{\text{l}}_{2}}\text{cm}\] respectively. The magnitudes, of the resistors R and X, in ohm, are then, equal, respectively, to
  A)
  \[\text{k(}{{\text{l}}_{\text{2}}}-{{\text{l}}_{\text{1}}}\text{)}\,\text{and}\,\text{k}{{\text{l}}_{\text{2}}}\]               
  done clear
  B)
  \[\text{k}{{\text{l}}_{\text{2}}}\,\text{and}\,\text{k}\,\text{(}{{\text{l}}_{\text{2}}}-{{\text{l}}_{\text{1}}})\]
  done clear
  C)
  \[\text{k(}{{\text{l}}_{\text{2}}}-{{\text{l}}_{\text{1}}})\,\,\text{and}\,\text{k}\,{{\text{l}}_{\text{1}}}\]               
  done clear
  D)
  \[\text{k}{{\text{l}}_{\text{2}}}\,\text{and}\,\text{k}{{\text{l}}_{2}}\]
  done clear
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• question_answer25) A tuning fork of frequency 512 Hz makes 4 beats/s with the vibrating string of a piano. The beat frequency decreases to 2 beats/s when the tension in the piano string is slightly increased. The frequency of the piano string before increasing the tension was                
  A)
  510 Hz   
  done clear
  B)
                         514-Hz               
  done clear
  C)
  516 Hz                  
  done clear
  D)
         508 Hz                
  done clear
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• question_answer26) Six vectors \[\overset{\to }{\mathop{\mathbf{a}}}\,\] through \[\overset{\to }{\mathop{\mathbf{f}}}\,\] have the magnitudes and directions indicated in the figure. Which of the following statements is true?
  A)
  \[\overset{\to }{\mathop{\mathbf{b}}}\,\,+\overset{\to }{\mathop{\mathbf{c}}}\,=\overset{\to }{\mathop{\mathbf{f}}}\,\]        
  done clear
  B)
         \[\overset{\to }{\mathop{\mathbf{d}}}\,\,+\overset{\to }{\mathop{\mathbf{c}}}\,=\overset{\to }{\mathop{\mathbf{f}}}\,\]        
  done clear
  C)
         \[\overset{\to }{\mathop{\mathbf{d}}}\,\,+\overset{\to }{\mathop{\mathbf{e}}}\,=\overset{\to }{\mathop{\mathbf{f}}}\,\]        
  done clear
  D)
         \[\overset{\to }{\mathop{\mathbf{b}}}\,\,+\overset{\to }{\mathop{\mathbf{e}}}\,=\overset{\to }{\mathop{\mathbf{f}}}\,\]
  done clear
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• question_answer27) A galvanometer has a coil of resistance 100\[\Omega \]  and gives a full scale deflection for 30 mA current. If it is to work as a voltmeter of 30 V range, the resistance required to be added will be
  A)
   900\[\Omega \]  
  done clear
  B)
                                         1800\[\Omega \]
  done clear
  C)
  500\[\Omega \]               
  done clear
  D)
         1000\[\Omega \]
  done clear
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• question_answer28) A gramophone record is revolving with an angular velocity \[\omega .\]A coin is placed at a distance r from the centre of the record. The static coefficient of friction is \[\mu \]. The coin will revolve with the record if
  A)
  \[r=\mu g{{\omega }^{2}}\]
  done clear
  B)
                         \[r<\frac{{{\omega }^{2}}}{\mu g}\]
  done clear
  C)
  \[r\le \frac{\mu g}{{{\omega }^{2}}}\]   
  done clear
  D)
         \[r\ge \frac{\mu g}{{{\omega }^{2}}}\]
  done clear
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• question_answer29) Which of the following statement is false for the properties of electromagnetic waves?
  A)
  Both electric and magnetic field vectors attain the maxima and minima at the same place and same time
  done clear
  B)
  The energy in electromagnetic wave is divided equally between electric and magnetic vectors
  done clear
  C)
  Both electric and magnetic field vectors are parallel to each other and perpendicular to the direction of propagation of wave
  done clear
  D)
  These waves do not require any material medium for propagation
  done clear
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• question_answer30) The energy of a hydrogen atom in the ground state is - 13.6 eV. The energy of a \[H{{e}^{+}}\] ion in the first excited state will be
  A)
  -13.6 eV                              
  done clear
  B)
  -27.2 eV
  done clear
  C)
  -54.4eV                               
  done clear
  D)
  - 6.8 eV
  done clear
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• question_answer31) The dimension of \[\frac{1}{2}{{\varepsilon }_{0}}{{E}^{2}},\] where \[{{\varepsilon }_{0}}\] is permittivity of free space and E is electric field, is
  A)
  \[\text{ }\!\![\!\!\text{ M}{{\text{L}}^{\text{2}}}{{\text{T}}^{\text{-2}}}\text{ }\!\!]\!\!\text{ }\]             
  done clear
  B)
  \[[M{{L}^{-1}}{{T}^{-2}}]\]
  done clear
  C)
  \[\text{ }\!\![\!\!\text{ M}{{\text{L}}^{\text{-2}}}{{\text{T}}^{\text{-1}}}\text{ }\!\!]\!\!\text{ }\]            
  done clear
  D)
         \[\text{ }\!\![\!\!\text{ ML}{{\text{T}}^{\text{-1}}}\text{ }\!\!]\!\!\text{ }\]
  done clear
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• question_answer32) In producing chlorine by electrolysis 100 kW power at 125 V is being consumed. How much chlorine per minute is liberated (ECE of chlorine is \[0.367\times {{10}^{-6}}kg{{C}^{-1}}\])
  A)
  \[\text{1}\text{.76 }\!\!\times\!\!\text{ 1}{{\text{0}}^{\text{-3}}}\text{kg}\]     
  done clear
  B)
         \[\text{9}\text{.67 }\!\!\times\!\!\text{ 1}{{\text{0}}^{\text{-3}}}\text{kg}\]
  done clear
  C)
  \[\text{17}\text{.61 }\!\!\times\!\!\text{ 1}{{\text{0}}^{\text{-3}}}\text{kg}\]
  done clear
  D)
         \[\text{3}\text{.67 }\!\!\times\!\!\text{ 1}{{\text{0}}^{\text{-3}}}\text{kg}\]
  done clear
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• question_answer33) A man of 50 kg mass is standing in a gravity free space at a height of 10m above the floor. He throws a stone of 0.5 kg mass downwards with a speed \[\text{2m}{{\text{s}}^{\text{-1}}}\]. When the stone reaches the floor, the distance of the man above the floor will be
  A)
  9.9 m                    
  done clear
  B)
         10.1m
  done clear
  C)
  10 m                     
  done clear
  D)
         20 m
  done clear
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• question_answer34) An alpha nucleus of energy \[\frac{\text{1}}{\text{2}}\text{m}{{\text{v}}^{\text{2}}}\] bombards a heavy nuclear target of charge \[Ze\]. Then the distance of closest approach for the alpha nucleus will be proportional to
  A)
  \[\frac{\text{1}}{Ze}\]  
  done clear
  B)
                         \[{{\text{v}}^{\text{2}}}\]
  done clear
  C)
  \[\frac{1}{m}\]                 
  done clear
  D)
         \[\frac{\text{1}}{{{\text{v}}^{\text{4}}}}\]
  done clear
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• question_answer35) A lens having focal length \[f\] and aperture of diameter d forms an image of intensity \[I\]. Aperture of diameter \[\frac{d}{2}\] in central region of lens is covered by a black paper. Focal length of lens and intensity of image now will be respectively
  A)
  \[f\,\text{and}\frac{1}{4}\]        
  done clear
  B)
         \[\frac{3f}{4}\text{and}\frac{I}{2}\]
  done clear
  C)
  \[f\,\text{and}\,\frac{3I}{4}\]    
  done clear
  D)
         \[\,\frac{f}{2}\,\text{and}\,\frac{I}{2}\]
  done clear
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• question_answer36) If \[\text{U}\] and \[\Delta W\] represent the increase in internal energy and work done by the system respectively in a thermodynamically process, which of the following is true?
  A)
  \[\text{U=}-\text{W,}\]in a adiabatic process
  done clear
  B)
  \[\text{U=}\text{W,}\]in a isothermal process
  done clear
  C)
  \[\text{U=}\text{W,}\] in a adiabatic process
  done clear
  D)
  \[\text{U=}-\text{W,}\]in a isothermal process
  done clear
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• question_answer37) The total radiant energy per unit area, normal to the direction of incidence, received at a distance R from the centre of a star of radius r, whose outer surface radiates as a black body at a temperature T K is given by (where \[\sigma \] is Stefan's constant)
  A)
  \[\sigma {{r}^{2}}{{T}^{4}}/{{R}^{2}}\]                   
  done clear
  B)
  \[\sigma {{r}^{2}}{{T}^{4}}/4\pi {{r}^{2}}\]
  done clear
  C)
  \[\sigma {{r}^{4}}{{T}^{4}}/{{r}^{4}}\]    
  done clear
  D)
         \[4\pi \,\sigma {{r}^{4}}{{T}^{4}}/{{R}^{2}}\]
  done clear
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• question_answer38) In the given circuit the reading of voltmeter \[{{\text{V}}_{1}}\]and \[{{\text{V}}_{\text{2}}}\] are 300 V each. The reading to the voltmeter \[{{\text{V}}_{3}}\] and ammeter A are respectively
  A)
  150 V, 2.2 A                        
  done clear
  B)
  220 V, 2.2 A
  done clear
  C)
  220 V, 2.0 A        
  done clear
  D)
         100 V, 2.0 A
  done clear
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• question_answer39) A 220 V input is supplied to a transformer. The output circuit draws a current of 2.0 A at 440 V. If the efficiency of the transformer is 80%, the current drawn by the primary windings of the transformer is
  A)
  3.6 A
  done clear
  B)
                                         2.8 A     
  done clear
  C)
         2.5 A                     
  done clear
  D)
         5.0 A
  done clear
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• question_answer40) A source\[{{\text{S}}_{\text{1}}}\]is producing, \[{{10}^{15}}\] photons/s of wavelength \[5000\overset{\text{o}}{\mathop{\text{A}}}\,\]. Another source \[{{\text{S}}_{\text{2}}}\] is producing\[1.02\times {{10}^{15}}\] photons per second of wavelength \[5100\overset{\text{o}}{\mathop{\text{A}}}\,\]. Then, (power of \[{{\text{S}}_{\text{2}}})/\](power of \[{{\text{S}}_{1}})\] is equal to
  A)
  1.00                       
  done clear
  B)
         1.02
  done clear
  C)
  1.04                       
  done clear
  D)
         0.98
  done clear
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• question_answer41) A common emitter amplifier has a voltage gain of 50, an input impedance of 100\[\Omega \] and an output impedance of 200\[\Omega \].The power gain the amplifier is
  A)
  500                        
  done clear
  B)
         1000
  done clear
  C)
  1250                      
  done clear
  D)
         50
  done clear
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• question_answer42) A vibration magnetometer placed in magnetic meridian has a small bar magnet. The magnet executes oscillations with a time period of 2 s in earth's horizontal magnetic field of 24 \[\text{T}\text{.}\]When a horizontal field of \[\text{18 }\text{T}\]is produced opposite to the earth's field by placing a current carrying wire, the new time period of magnet will be
  A)
  1s     
  done clear
  B)
                                         2s                           
  done clear
  C)
         3s                           
  done clear
  D)
         4s
  done clear
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• question_answer43) Two positive ions, each carrying a charge q, are separated by a distance d. If F is the force of repulsion between the ions, the number of electrons missing from each ion will be (e being the charge on an electron)
  A)
  \[\frac{4\pi {{\varepsilon }_{0}}F{{d}^{2}}}{{{e}^{2}}}\]  
  done clear
  B)
         \[\sqrt{\frac{4\pi {{\varepsilon }_{0}}F{{e}^{2}}}{{{d}^{2}}}}\]
  done clear
  C)
  \[\sqrt{\frac{4\pi {{\varepsilon }_{0}}F{{d}^{2}}}{{{e}^{2}}}}\]    
  done clear
  D)
         \[\frac{4\pi {{\varepsilon }_{0}}F{{d}^{2}}}{{{q}^{2}}}\]
  done clear
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• question_answer44) The potential difference that must be applied to stop the fastest photoelectrons emitted by a nickel surface, having work function 5.01 eV, when ultraviolet light of 200nm falls on it, must be
  A)
  2.4 V
  done clear
  B)
                         -1.2 V
  done clear
  C)
  2.4 V     
  done clear
  D)
         1.2 V
  done clear
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• question_answer45) A square surface of side L metre in the plane of the paper is placed in a uniform electric field E (volt/m) acting along the same place at an angle \[\theta \] with the horizontal side of the square as shown in figure. The electric flux linked to the surface in unit of V-m, is
  A)
  \[\text{E}{{\text{L}}^{\text{2}}}\]                           
  done clear
  B)
         \[\text{E}{{\text{L}}^{\text{2}}}\operatorname{co}\text{s}\,\]
  done clear
  C)
  \[\text{E}{{\text{L}}^{\text{2}}}\sin \,\]
  done clear
  D)
         0
  done clear
  View Answer play_arrow

• question_answer46) A series combination of \[{{n}_{1}}\] capacitors, each of value \[{{C}_{1}},\] is charged by a source of potential difference  4V. When another parallel combination of \[{{n}_{2}}\] capacitors, each of value \[{{C}_{2}},\] is charged by a source of potential difference V, it has the same (total) energy stored in it, as the first combination has. The value of \[{{C}_{2}},\] in terms of \[{{C}_{1}},\] is then
  A)
  \[\frac{2{{C}_{1}}}{{{n}_{1}}\,{{n}_{2}}}\]             
  done clear
  B)
         \[16\frac{{{n}_{2}}}{{{n}_{1}}\,}{{C}_{1}}\]
  done clear
  C)
  \[2\frac{{{n}_{2}}}{{{n}_{1}}\,}{{C}_{1}}\]             
  done clear
  D)
         \[\frac{16{{C}_{1}}}{{{n}_{1}}\,{{n}_{2}}\,}\]
  done clear
  View Answer play_arrow

• question_answer47) Electromagnets are made of soft iron because soft iron has
  A)
  low retentively and high coercive force
  done clear
  B)
  high retentively and high coercive force
  done clear
  C)
  low receptivity and low coercive force
  done clear
  D)
  high retentively and low coercive force
  done clear
  View Answer play_arrow

• question_answer48) A square current carrying loop is suspended in a uniform magnetic field acting in the plane of the loop. If the force on one arm of the loop is\[\overset{\to }{\mathop{\mathbf{F}}}\,\], the net force on the remaining three arms of the loop is
  A)
  \[3\overset{\to }{\mathop{\mathbf{F}}}\,\]
  done clear
  B)
                                         \[-\overset{\to }{\mathop{\mathbf{F}}}\,\]
  done clear
  C)
  \[-3\overset{\to }{\mathop{\mathbf{F}}}\,\]                     
  done clear
  D)
         \[\overset{\to }{\mathop{\mathbf{F}}}\,\]
  done clear
  View Answer play_arrow

• question_answer49) Consider the following two statements (A) Kirchhoffs junction law follows from the conservation of charge. (B) Kirchhoffs loop law follows from the conservation of energy. Which of the following is correct?
  A)
  Both (A) and (B) are wrong
  done clear
  B)
  is correct and (B) is wrong
  done clear
  C)
  is wrong and (B) is correct
  done clear
  D)
  Both (A) and (B) are correct
  done clear
  View Answer play_arrow

• question_answer50) To get an output Y = 1 from the circuit shown below, the input must be
  A)
  A             B             C                 0              1              0
  done clear
  B)
                  0              0              1
  done clear
  C)
                  1              0              1
  done clear
  D)
                  1              0              0
  done clear
  View Answer play_arrow

• question_answer51)   For the reaction, \[{{N}_{2}}{{O}_{5}}(g)\xrightarrow[{}]{{}}2N{{O}_{2}}(g)+\frac{1}{2}{{O}_{2}}(g)\]the value of rate of disappearance of \[{{\text{N}}_{\text{2}}}{{\text{O}}_{\text{5}}}\] is given as \[6.25\times {{10}^{-3}}\]\[\text{mol}\,{{\text{L}}^{\text{-1}}}{{\text{s}}^{\text{-1}}}\]. The rate of formation of NO 3 and 0; is given respectively as
  A)
  \[6.25\times {{10}^{-3}}mol\,{{L}^{-1}}{{s}^{-1}}\]and \[6.25\times {{10}^{-3}}mol\,{{L}^{-1}}{{s}^{-1}}\]
  done clear
  B)
  \[1.25\times {{10}^{-2}}mol\,{{L}^{-1}}{{s}^{-1}}\]and \[3.125\times {{10}^{-3}}mol\,{{L}^{-1}}{{s}^{-1}}\]
  done clear
  C)
  \[6.25\times {{10}^{-3}}mol\,{{L}^{-1}}{{s}^{-1}}\]and \[3.125\times {{10}^{-3}}mol\,{{L}^{-1}}{{s}^{-1}}\]
  done clear
  D)
  \[1.25\times {{10}^{-3}}mol\,{{L}^{-1}}{{s}^{-1}}\]and \[6.25\times {{10}^{-3}}mol\,{{L}^{-1}}{{s}^{-1}}\]
  done clear
  View Answer play_arrow

• question_answer52) Liquid hydrocarbons can be converted to a mixture of gaseous hydrocarbons by
  A)
  oxidation                            
  done clear
  B)
  cracking
  done clear
  C)
  distillation under reduced pressure
  done clear
  D)
  Hydrolysis
  done clear
  View Answer play_arrow

• question_answer53) In which of the following pairs of molecules/ions, the central atoms have \[s{{p}^{2}}\] hybridisation ?
  A)
  \[\text{NO}_{2}^{-}\text{and}\,\text{N}{{\text{H}}_{\text{3}}}\]            
  done clear
  B)
  \[\text{BF}_{\text{3}}^{{}}\text{and}\,\text{NH}_{2}^{-}\]
  done clear
  C)
  \[\text{NH}_{\text{2}}^{\text{-}}\text{and}\,\text{H}_{2}^{{}}\text{O}\]
  done clear
  D)
         \[\text{BF}_{3}^{{}}\text{and}\,\text{NH}_{2}^{-}\]       
  done clear
  View Answer play_arrow

• question_answer54) Which one of the following does not exhibit the phenomenon of mutarotation?
  A)
  (+) Sucrose
  done clear
  B)
         (+) Lactose         
  done clear
  C)
         (+) Maltose    
  done clear
  D)
         (-) Fructose
  done clear
  View Answer play_arrow

• question_answer55) Which one of the following species does not exist under normal conditions?
  A)
  \[\text{Be}_{\text{2}}^{\text{+}}\]                                        
  done clear
  B)
  \[\text{Be}_{\text{2}}^{{}}\]                     
  done clear
  C)
  \[\text{B}_{\text{2}}^{{}}\]                        
  done clear
  D)
         \[\text{Li}_{\text{2}}^{{}}\]
  done clear
  View Answer play_arrow

• question_answer56) Which of the following complex ions is not expected to absorb visible light?
  A)
  \[{{\text{ }\!\![\!\!\text{ Ni(CN}{{\text{)}}_{\text{4}}}\text{ }\!\!]\!\!\text{ }}^{\text{2-}}}\]      
  done clear
  B)
         \[{{\text{ }\!\![\!\!\text{ Cr(N}{{\text{H}}_{\text{3}}}{{\text{)}}_{6}}\text{ }\!\!]\!\!\text{ }}^{\text{3+}}}\]
  done clear
  C)
  \[{{\text{ }\!\![\!\!\text{ Fe(}{{\text{H}}_{2}}\text{O}{{\text{)}}_{6}}\text{ }\!\!]\!\!\text{ }}^{\text{2+}}}\]               
  done clear
  D)
         \[{{\text{ }\!\![\!\!\text{ Ni(}{{\text{H}}_{2}}\text{O}{{\text{)}}_{6}}\text{ }\!\!]\!\!\text{ }}^{\text{2+}}}\]
  done clear
  View Answer play_arrow

• question_answer57) Given are cyclohexanol (I), acetic acid (II), 2, 4, 6-trinitrophenol (III) and phenol (IV). In these, the order of decreasing acidic character will be                       
  A)
  III > II > IV > I  
  done clear
  B)
         II > III > I > IV     
  done clear
  C)
         II > III > IV > I  
  done clear
  D)
         III > IV > II > I
  done clear
  View Answer play_arrow

• question_answer58) If pH of a saturated solution of \[Ba{{(OH)}_{2}}\] is 12, the value of its \[{{K}_{sp}}\] is
  A)
  \[\text{4}\text{.00 }\!\!\times\!\!\text{ 1}{{\text{0}}^{\text{-6}}}{{\text{M}}^{\text{3}}}\]                         
  done clear
  B)
  \[\text{4}\text{.00 }\!\!\times\!\!\text{ 1}{{\text{0}}^{\text{-7}}}{{\text{M}}^{\text{3}}}\]
  done clear
  C)
                         \[\text{5}\text{.00 }\!\!\times\!\!\text{ 1}{{\text{0}}^{\text{-6}}}{{\text{M}}^{\text{3}}}\]         
  done clear
  D)
         \[\text{5}\text{.00 }\!\!\times\!\!\text{ 1}{{\text{0}}^{\text{-7}}}{{\text{M}}^{\text{3}}}\]
  done clear
  View Answer play_arrow

• question_answer59) The reaction of toluene with\[\text{C}{{\text{l}}_{\text{2}}}\] in presence of \[\text{FeC}{{\text{l}}_{3}}\]gives V and reaction in presence of light gives V. Thus, V and Y are
  A)
  X = Benzal chloride, Y = o-chlorotoluene
  done clear
  B)
  X = m-chlorotoluene, Y = p-chlorotoluene
  done clear
  C)
  X = o-and p-chlorotoluene Y = trichloromethyl benzene
  done clear
  D)
  X = benzyl chloride, Y = m-chlorotoluene
  done clear
  View Answer play_arrow

• question_answer60) Which one of the following compounds has the most acidic nature?
  A)
                                                 
  done clear
  B)
   
  done clear
  C)
                                                 
  done clear
  D)
   
  done clear
  View Answer play_arrow

• question_answer61) In a set of reactions, ethyl benzene yielded a product D. ?D? would be
  A)
   
  done clear
  B)
   
  done clear
  C)
                                                 
  done clear
  D)
   
  done clear
  View Answer play_arrow

• question_answer62) What is \[\text{ }\!\![\!\!\text{ }{{\text{H}}^{\text{+}}}\text{ }\!\!]\!\!\text{ }\] in mol/L of a solution that is 0.20 M in \[\text{C}{{\text{H}}_{\text{3}}}\text{COONa}\] and 0.10 M in \[\text{C}{{\text{H}}_{\text{3}}}\text{COOH}\] ? (Ka for \[\text{C}{{\text{H}}_{\text{3}}}\text{COOH=1}\text{.8}\times \text{1}{{\text{0}}^{\text{-5}}}\])
  A)
  \[3.5\times {{10}^{-4}}\]                              
  done clear
  B)
  \[1.1\times {{10}^{-5}}\]                              
  done clear
  C)
  \[1.8\times {{10}^{-5}}\]              
  done clear
  D)
         \[9.0\times {{10}^{-6}}\]
  done clear
  View Answer play_arrow

• question_answer63) For an endothermic reaction, energy of activation is \[{{E}_{a}}\] and enthalpy of reaction is \[\Delta H\](both of these in kJ/mol). Minimum value of \[{{E}_{a}}\] will be
  A)
  less than \[\Delta H\]   
  done clear
  B)
  equal to \[\Delta H\]
  done clear
  C)
                         more than \[\Delta H\] 
  done clear
  D)
         equal to zero
  done clear
  View Answer play_arrow

• question_answer64) The correct order of increasing reactivity of C?X bond towards nucleophile in the following compounds is
  A)
  I < II < IV < III
  done clear
  B)
         II < III < I < IV     
  done clear
  C)
         IV < III < I < II  
  done clear
  D)
         III < II < I < IV
  done clear
  View Answer play_arrow

• question_answer65) For the reduction of silver ions with copper metal, the standard cell potential was found to be + 0.46V at 25°C. The value of standard Gibbs energy, \[\Delta {{G}^{o}}\]will be \[(F=96500\,C\,mo{{l}^{-1}})\]
  A)
  -89-0 kJ     
  done clear
  B)
                         -89.0 J  
  done clear
  C)
         -44.5 kJ                
  done clear
  D)
         -98.0k J
  done clear
  View Answer play_arrow

• question_answer66) In which of the following equilibrium \[{{K}_{c}}\] and \[{{K}_{p}}\] are not equal?
  A)
  \[2NO(g){{N}_{2}}(g)+{{O}_{2}}(g)\]
  done clear
  B)
  \[S{{O}_{2}}(g)+N{{O}_{2}}(g)S{{O}_{3}}(g)+NO(g)\]
  done clear
  C)
  \[{{H}_{2}}(g)+{{I}_{2}}(g)2HI(g)\]
  done clear
  D)
  \[2C(s)+{{O}_{2}}(g)2C{{O}_{2}}(g)\]
  done clear
  View Answer play_arrow

• question_answer67) Which of the following ions will: exhibit colour in aqueous solutions ?          
  A)
  \[L{{a}^{3+}}(Z=57)\]
  done clear
  B)
         \[T{{i}^{3+}}(Z=22)\]
  done clear
  C)
  \[L{{u}^{3+}}(Z=71)\]
  done clear
  D)
         \[S{{c}^{3+}}(Z=21)\]     
  done clear
  View Answer play_arrow

• question_answer68) Aniline in a set of the following reactions yielded a coloured product V.                    The structure of ?Y? would be
  A)
   
  done clear
  B)
   
  done clear
  C)
   
  done clear
  D)
   
  done clear
  View Answer play_arrow

• question_answer69) Acetamide is treated with the following reagents separately. Which one of these would yield methyl amine ?
  A)
  \[NaOH-B{{r}_{2}}\]       
  done clear
  B)
  Sodalime
  done clear
  C)
  Hot conc\[{{H}_{2}}S{{O}_{4}}\]               
  done clear
  D)
  \[PC{{l}_{5}}\]
  done clear
  View Answer play_arrow

• question_answer70) An aqueous solution is 1.00 molal in KI. Which change will cause the vapour pressure of the solution to increase?
  A)
  Addition of \[NaCl\]
  done clear
  B)
  Addition of \[N{{a}_{2}}S{{O}_{4}}\]
  done clear
  C)
  Addition of 1.00 molal KI
  done clear
  D)
  Addition of water
  done clear
  View Answer play_arrow

• question_answer71) A solution of sucrose   (molar mass \[=342\,g\,\,\text{mo}{{\text{l}}^{-1}}\]) has been prepared by dissolving 68.5 g of sucrose in 1000 g of water. The freezing point of the solution obtained will be (\[{{k}_{f}}\] for water \[=1.86\,\,K\,\,kg\,\,mo{{l}^{-1}}\])
  A)
  -0.372°C 
  done clear
  B)
                         -0.520°C
  done clear
  C)
  + 0.372°C            
  done clear
  D)
         - 0.570° C
  done clear
  View Answer play_arrow

• question_answer72) Which of the following alkaline earth metal sulphates has hydration enthalpy higher than the lattice enthalpy ?
  A)
  \[CaS{{O}_{4}}\]              
  done clear
  B)
  \[BeS{{O}_{4}}\]                                       
  done clear
  C)
  \[BaS{{O}_{4}}\]              
  done clear
  D)
         \[SrS{{O}_{4}}\]
  done clear
  View Answer play_arrow

• question_answer73) Which one of the following ions has electronic configuration \[[Ar]\,3{{d}^{6}}\] ? (At. no: Mn = 25, Fe = 26, Co = 27, Ni = 28)
  A)
  \[\text{N}{{\text{i}}^{\text{3+}}}\]                                         
  done clear
  B)
  \[\text{M}{{\text{n}}^{\text{3+}}}\]      
  done clear
  C)
         \[\text{F}{{\text{e}}^{\text{3+}}}\]                        
  done clear
  D)
         \[\text{C}{{\text{o}}^{\text{3+}}}\]
  done clear
  View Answer play_arrow

• question_answer74) An increase in equivalent conductance of a strong electrolyte with dilution is mainly due  to
  A)
  increase in ionic mobility of ions
  done clear
  B)
  100% ionisation of electrolyte at normal dilution
  done clear
  C)
  increase in both, ie, number of ions and ionic mobility of ions
  done clear
  D)
  increase in number of ions
  done clear
  View Answer play_arrow

• question_answer75) Crystal field stabilization energy for high spin \[{{d}^{4}}\] octahedral complex is
  A)
  \[-1.8{{\Delta }_{o}}\]                   
  done clear
  B)
  \[-1.6{{\Delta }_{o}}+P\]
  done clear
  C)
  \[-1.2{{\Delta }_{o}}\]   
  done clear
  D)
         \[-0.6{{\Delta }_{o}}\]
  done clear
  View Answer play_arrow

• question_answer76) Oxidation states of P in\[{{H}_{4}}{{P}_{2}}{{O}_{5}},\]\[{{H}_{4}}{{P}_{2}}{{O}_{6}},\]\[{{H}_{4}}{{P}_{2}}{{O}_{7}},\] are respectively
  A)
  + 3, + 5, + 4    
  done clear
  B)
         + 5, + 3, + 4        
  done clear
  C)
  + 5, + 4, + 3    
  done clear
  D)
         + 3, + 4, + 5
  done clear
  View Answer play_arrow

• question_answer77) Which of the following statements about primary amines is false?
  A)
  Alkyl amines are stronger bases than aryl amines
  done clear
  B)
  Alkyl amines react with nitrous acid to produce alcohols
  done clear
  C)
  Aryl amines react with nitrous acid to produce phenols
  done clear
  D)
  Alkyl amines are stronger bases than ammonia
  done clear
  View Answer play_arrow

• question_answer78) The correct order of increasing bond angles in the following species-is
  A)
  \[C{{l}_{2}}O<Cl{{O}_{2}}<ClO_{2}^{-}\]
  done clear
  B)
  \[C{{l}_{2}}O<C{{l}_{2}}O<ClO_{2}^{-}\]
  done clear
  C)
  \[C{{l}_{2}}O<ClO_{2}^{-}<ClO_{2}^{{}}\]
  done clear
  D)
  \[ClO_{2}^{-}<C{{l}_{2}}O<ClO_{2}^{{}}\]
  done clear
  View Answer play_arrow

• question_answer79) Among the given compounds, the most susceptible to nucleophilic attack at the carbonyl group is
  A)
  \[C{{H}_{3}}COOC{{H}_{3}}\]     
  done clear
  B)
  \[C{{H}_{3}}CON{{H}_{2}}\]
  done clear
  C)
  \[C{{H}_{3}}COOCOC{{H}_{3}}\]               
  done clear
  D)
  \[C{{H}_{3}}COCl\]
  done clear
  View Answer play_arrow

• question_answer80) 25.3 g of sodium carbonate, \[N{{a}_{2}}C{{O}_{3}}\]is dissolved in enough water to make 250 mL of solution. If sodium carbonate dissociates completely, molar concentration of sodium ion, \[N{{a}^{+}}\] and carbonate ion, \[CO_{3}^{2-}\] are respectively     (Molar     mass     of \[N{{a}_{2}}C{{O}_{3}}=106g\,mo{{l}^{-1}}\])
  A)
  0.955 M and 1.910 M                   
  done clear
  B)
  1.910 M and 0.955 M                   
  done clear
  C)
  1.90 M and 1.910 M                    
  done clear
  D)
  0.477 M and 0.477 M                  
  done clear
  View Answer play_arrow

• question_answer81) In a buffer solution containing equal concentration of \[{{B}^{-}}\] and HB, the \[{{K}_{b}}\] for \[{{B}^{-}}\] is \[{{10}^{-10}}\] The pH of buffer solution is             
  A)
  10          
  done clear
  B)
                         7                   
  done clear
  C)
  6                             
  done clear
  D)
         4                   
  done clear
  View Answer play_arrow

• question_answer82) The existence of two different coloured complexes   with   the   composition   of \[{{[Co{{(N{{H}_{3}})}_{4}}C{{l}_{2}}]}^{+}}\] is due to
  A)
  linkage isomerism
  done clear
  B)
  geometrical isomerism
  done clear
  C)
  coordination isomerism
  done clear
  D)
  ionization isomerism
  done clear
  View Answer play_arrow

• question_answer83) Property of the alkaline earth metals that increases with their atomic number
  A)
  solubility of their hydroxides in water
  done clear
  B)
  solubility of their sulphates in water
  done clear
  C)
  ionisation energy
  done clear
  D)
  electro negativity
  done clear
  View Answer play_arrow

• question_answer84) During the kinetic study of the reaction, \[2A+B\to C+D,\] following  results  were obtained \[Ru\,[A]/mol\,{{L}^{-1}}[B]/mol\,{{L}^{-1}}\]Initial rate of formation of \[D/mol\,{{L}^{-1}}{{\min }^{-1}}\] I               0.1          0.1          \[6.0\times {{10}^{-3}}\] II             0.3          0.2          \[7.2\times {{10}^{-2}}\] III            0.3          0.4          \[2.88\times {{10}^{-1}}\] IV            0.4          0.1          \[2.40\times {{10}^{-2}}\] Based on the above data which one of the following is correct ?
  A)
  \[rate=k{{[A]}^{2}}[B]\]               
  done clear
  B)
  \[rate=k[A][B]\]
  done clear
  C)
  \[rate=k{{[A]}^{2}}{{[B]}^{2}}\]
  done clear
  D)
         \[rate=k[A]{{[B]}^{2}}\]
  done clear
  View Answer play_arrow

• question_answer85) Which of the following pairs has the same size?
  A)
  \[F{{e}^{2+}},N{{i}^{2+}}\]                          
  done clear
  B)
  \[Z{{r}^{4+}},T{{i}^{4+}}\]
  done clear
  C)
  \[Z{{r}^{4+}},H{{f}^{4+}}\]          
  done clear
  D)
         \[Z{{n}^{2+}},H{{f}^{4+}}\]
  done clear
  View Answer play_arrow

• question_answer86) The correct order of the decreasing ionic radii among the following is electronic species is
  A)
  \[C{{a}^{2+}}>{{K}^{+}}>{{S}^{2-}}>C{{l}^{-}}\]
  done clear
  B)
  \[C{{l}^{-}}>{{S}^{2-}}>C{{a}^{2+}}>{{K}^{+}}\]
  done clear
  C)
  \[{{S}^{2-}}>C{{l}^{-}}>{{K}^{+}}>C{{a}^{2+}}\]
  done clear
  D)
  \[{{K}^{+}}>C{{a}^{2+}}>C{{l}^{-}}>{{S}^{2-}}\]
  done clear
  View Answer play_arrow

• question_answer87) In which one of the following species the central atom has the type of hybridization which is not the same as that present in the other three ?
  A)
  \[S{{F}_{4}}\]                    
  done clear
  B)
         \[I_{3}^{-}\]
  done clear
  C)
  \[SbCl_{5}^{2-}\]             
  done clear
  D)
         \[PC{{l}_{5}}\]
  done clear
  View Answer play_arrow

• question_answer88) Standard entropies of \[{{X}_{2}},{{Y}_{2}}\]and \[X{{Y}_{3}}\]are 60, 40 and \[50\,J\,{{K}^{-1}}\,mo{{l}^{-1}}\]respectively. For the reaction \[\frac{1}{2}{{X}_{2}}+\frac{3}{2}{{Y}_{2}}X{{Y}_{3}};\Delta H=-30kJ,\]to be at equilibrium, the temperature should be
  A)
  750 K  
  done clear
  B)
                                         1000 K  
  done clear
  C)
         1250 K                  
  done clear
  D)
         500 K
  done clear
  View Answer play_arrow

• question_answer89) Which of the following represents the correct order of increasing electron gain enthalpy with negative sign for the elements O, S, F and Cl ?
  A)
  CI < F < O < S  
  done clear
  B)
         O < S < F < CI
  done clear
  C)
         F < S < O < CI  
  done clear
  D)
          S < O < CI < F
  done clear
  View Answer play_arrow

• question_answer90) Which one of the following compounds is a peroxide ?
  A)
  \[K{{O}_{2}}\]                   
  done clear
  B)
         \[Ba{{O}_{2}}\]
  done clear
  C)
  \[Mn{{O}_{2}}\]              
  done clear
  D)
         \[N{{O}_{2}}\]
  done clear
  View Answer play_arrow

• question_answer91) Which one is most reactive towards electrophonic reagent?
  A)
                                                 
  done clear
  B)
   
  done clear
  C)
                                                 
  done clear
  D)
   
  done clear
  View Answer play_arrow

• question_answer92) Which one of the following is employed as a tranquilizer drug ?
  A)
  Promethazine   
  done clear
  B)
         Valium 
  done clear
  C)
         Naproxen     
  done clear
  D)
         Mifepristone
  done clear
  View Answer play_arrow

• question_answer93) In the following the most stable conformation of n-butane is
  A)
                                                 
  done clear
  B)
   
  done clear
  C)
                                                 
  done clear
  D)
  
  done clear
  View Answer play_arrow

• question_answer94) Which of the following reactions will not result in the formation of carbon-carbon bonds?
  A)
  Reimer-Tiemann reaction
  done clear
  B)
  Cannizaro reaction
  done clear
  C)
  Wurtz reaction
  done clear
  D)
  Friedel-Crafts acylation
  done clear
  View Answer play_arrow

• question_answer95) Which of the following structures represents neoprene polymer ?
  A)
  \[-(C{{H}_{2}}-)\underset{\begin{smallmatrix}  | \\  Cl \end{smallmatrix}}{\mathop{C}}\,=CH-C{{H}_{2}}){{-}_{n}}\]
  done clear
  B)
  \[-(C{{H}_{2}}-\underset{{}}{\overset{\begin{smallmatrix}  CN \\  | \end{smallmatrix}}{\mathop{C}}}\,H){{-}_{n}}\]
  done clear
  C)
  \[-(C{{H}_{2}}-\underset{{}}{\overset{\begin{smallmatrix}  CN \\  | \end{smallmatrix}}{\mathop{C}}}\,H){{-}_{n}}\]
  done clear
  D)
  \[-(\underset{\begin{smallmatrix}  | \\  {{C}_{6}}{{H}_{5}} \end{smallmatrix}}{\mathop{CH}}\,-C{{H}_{2}}){{-}_{n}}\]
  done clear
  View Answer play_arrow

• question_answer96) Which one is most reactive towards \[{{S}_{N}}1\]reaction?
  A)
  \[{{C}_{6}}{{H}_{5}}CH({{C}_{6}}{{H}_{5}})Br\]
  done clear
  B)
  \[{{C}_{6}}{{H}_{5}}CH(C{{H}_{3}})Br\]
  done clear
  C)
  \[{{C}_{6}}{{H}_{5}}C(C{{H}_{3}})({{C}_{6}}{{H}_{5}})Br\]
  done clear
  D)
  \[{{C}_{6}}{{H}_{5}}C{{H}_{2}}Br\]
  done clear
  View Answer play_arrow

• question_answer97) AB crystallizes in a body centred cubic lattice with edge length 'a' equal to 387 pm. The distance between two oppositively charged ions in the lattice is
  A)
  335 pm                
  done clear
  B)
  250 pm
  done clear
  C)
  200 pm
  done clear
  D)
         300 pm
  done clear
  View Answer play_arrow

• question_answer98) The number of atoms in 0.1 mole of a diatomic gas is \[({{N}_{A}}=6.02\times {{10}^{23}}mo{{l}^{-1}})\]
  A)
  \[6.026\times {{10}^{22}}\]                         
  done clear
  B)
  \[1.806\times {{10}^{23}}\]
  done clear
  C)
  \[3.600\times {{10}^{23}}\]         
  done clear
  D)
         \[1.800\times {{10}^{22}}\]
  done clear
  View Answer play_arrow

• question_answer99) Which one of the following molecular hydrides acts as a Lewis acid ?
  A)
  \[N{{H}_{3}}\] 
  done clear
  B)
         \[{{H}_{2}}O\]
  done clear
  C)
  \[{{B}_{2}}{{H}_{6}}\]    
  done clear
  D)
        \[C{{H}_{4}}\]
  done clear
  View Answer play_arrow

• question_answer100) The tendency of \[B{{F}_{3}},\,BC{{l}_{3}}\] and \[BB{{r}_{3}}\] to behave as Lewis acid decreases in the sequence
  A)
  \[BC{{l}_{3}}>B{{F}_{3}}BB{{r}_{3}}\]      
  done clear
  B)
  \[BB{{r}_{3}}>BC{{l}_{3}}>B{{F}_{3}}\]
  done clear
  C)
  \[BB{{r}_{3}}>B{{F}_{3}}>BC{{l}_{3}}\]   
  done clear
  D)
  \[B{{F}_{3}}>BC{{l}_{3}}>BB{{r}_{3}}\]
  done clear
  View Answer play_arrow

• question_answer101) In vitro fertilization is a technique that involves transfer of which one of the following into the Fallopian tube?
  A)
  Embryo only, upto 8 cell stage
  done clear
  B)
  Either zygote or early embryo upto 8 cell stage
  done clear
  C)
  Embryo of 32 cell stage
  done clear
  D)
  Zygote only
  done clear
  View Answer play_arrow

• question_answer102) Which one of the following structures between two adjacent cells is an effective transport pathway?
  A)
  Plasmodesmata               
  done clear
  B)
  Plastoquinones
  done clear
  C)
  Endoplasmic reticulum
  done clear
  D)
  Plasmalemma
  done clear
  View Answer play_arrow

• question_answer103) Single-celled eukaryotes are included in
  A)
  Protista                               
  done clear
  B)
  Fungi    
  done clear
  C)
         Archaea              
  done clear
  D)
         Monera
  done clear
  View Answer play_arrow

• question_answer104) The genetically-modified (GM) brinjal in India has been developed for
  A)
  insect-resistance
  done clear
  B)
  enhancing self life
  done clear
  C)
  enhancing mineral content
  done clear
  D)
  drought-resistance
  done clear
  View Answer play_arrow

• question_answer105) In unilocular ovary with a single ovule, the placentation is
  A)
  marginal       
  done clear
  B)
         basal     
  done clear
  C)
         free central     
  done clear
  D)
         axile
  done clear
  View Answer play_arrow

• question_answer106) An element playing important role in nitrogen fixation is
  A)
  molybdenum    
  done clear
  B)
  copper 
  done clear
  C)
         manganese    
  done clear
  D)
         zinc
  done clear
  View Answer play_arrow

• question_answer107) Sertoli cells are found in
  A)
  ovaries and secrete progesterone
  done clear
  B)
  adrenal cortex and secrete adrenalin
  done clear
  C)
  somniferous tubules and provide nutrition to germ cells
  done clear
  D)
  pancreas and secrete cholecystokinin
  done clear
  View Answer play_arrow

• question_answer108) Which one of the following cannot be explained on the basis of Mendel's Law of Dominance?
  A)
  The discrete unit controlling a particular character is called a factor
  done clear
  B)
  Out of one pair of factors one is dominant, and the other recessive
  done clear
  C)
  Alleles do not show any blending and both the characters recover as such in \[{{F}_{2}}\]generation
  done clear
  D)
  Factors occur in pairs
  done clear
  View Answer play_arrow

• question_answer109) Apomictic embryos in Citrus arise from
  A)
  synergids
  done clear
  B)
  maternal sporophytic tissue in ovule
  done clear
  C)
  antipodal cells
  done clear
  D)
         diploid egg
  done clear
  View Answer play_arrow

• question_answer110) One example of animals having a single opening to the outside that serves both as mouth as well as anus is
  A)
  Octopus        
  done clear
  B)
         Asterios              
  done clear
  C)
  Ascidia                 
  done clear
  D)
  Fasciola
  done clear
  View Answer play_arrow

• question_answer111) Select the correct statement from the ones given below
  A)
  Barbiturates when given to criminals make them tell the truth
  done clear
  B)
  Morphine is often given to persons who have under gone surgery as a pain killer
  done clear
  C)
  Chewing tobacco lowers blood pressure and heart rate
  done clear
  D)
  Cocaine is given to patients after surgery as it stimulates recovery
  done clear
  View Answer play_arrow

• question_answer112) Listed below are four respiratory capacities (1 - 4)and four jumbled respiratory volumes of a normal human adult Respiratory         Respiratory capacities            volumes (1) Residual volume        2500 mL (2) Vital capacity               3500 mL (3) Inspiratory reserve   1200 mL volume (4) Inspiratory capacity 4500 mL Which one of the following is the correct matching of two capacities and volumes?
  A)
  (2) 2500 mL,                        (3) 4500 mL
  done clear
  B)
  (3) 1200 mL,                        (4) 2500 mL
  done clear
  C)
  (4) 3500 mL,                        (1) 1200 mL
  done clear
  D)
  (1) 4500 mL,                        (2) 3500 mL
  done clear
  View Answer play_arrow

• question_answer113) The chief water conducting elements of xylem in gymnosperms are
  A)
  vessels                                
  done clear
  B)
  fibres                   
  done clear
  C)
  transfusion tissue           
  done clear
  D)
  tracheids
  done clear
  View Answer play_arrow

• question_answer114) Ringworm in humans is caused by
  A)
  bacteria               
  done clear
  B)
         fungi     
  done clear
  C)
         nematodes     
  done clear
  D)
         viruses
  done clear
  View Answer play_arrow

• question_answer115) Which one of the following is not a micronutrient?
  A)
  Molybdenum
  done clear
  B)
         Magnesium
  done clear
  C)
  Zinc                       
  done clear
  D)
         Boron
  done clear
  View Answer play_arrow

• question_answer116) Membrane-bound organelles are absent in      
  A)
  Saccharomyces
  done clear
  B)
  Streptococcus
  done clear
  C)
                         Chlamydomonas
  done clear
  D)
         PIasmodium                             
  done clear
  View Answer play_arrow

• question_answer117) Vasa efferentia are the ductules leading from
  A)
  testicular lobules to rete tesds
  done clear
  B)
  rete testis to vas deferens
  done clear
  C)
  vas deferens to epididymis                 
  done clear
  D)
  epididymis to urethra
  done clear
  View Answer play_arrow

• question_answer118) Select the correct statement from the following
  A)
  Biogas is produced by the activity of aerobic bacteria on animal waste
  done clear
  B)
  Methanobacterium is an aerobic bacterium found in rumen of cattle
  done clear
  C)
  Biogas, commonly called gobar gas, is pure Methane
  done clear
  D)
  Activated sludge-sediment in settlement tanks of sewage treatment plant is a right source of aerobic bacteria
  done clear
  View Answer play_arrow

• question_answer119) Select the two statements out of the four (1-4) given below about (ac operon. (1) Glucose or galactose may bind with the represser and inactivate it (2) In the absence of lactose, the represser binds with the operator region (3) The z-gene codes for permease (4) This was elucidated by Francois Jacob and Jacques Monod The correct statements are
  A)
  (2) and (3)     
  done clear
  B)
         (2) and (3)          
  done clear
  C)
         (2) and (4)     
  done clear
  D)
         (1) and (2)
  done clear
  View Answer play_arrow

• question_answer120) Keel is characteristic of the flowers of
  A)
  gulmohur           
  done clear
  B)
  Cassia   
  done clear
  C)
         Calotropis      
  done clear
  D)
         bean
  done clear
  View Answer play_arrow

• question_answer121) The kind of epithelium  which forms the inner walls of blood vessels is
  A)
  cuboidal epithelium
  done clear
  B)
  columnar epithelium
  done clear
  C)
  ciliated columnar epithelium
  done clear
  D)
  squamous epithelium
  done clear
  View Answer play_arrow

• question_answer122) Which one of the following has its own DNA?
  A)
  Mitochondria  
  done clear
  B)
         Dictyosome       
  done clear
  C)
         Lysosome     
  done clear
  D)
         Peroxisome
  done clear
  View Answer play_arrow

• question_answer123) Transfer of pollen grains from the anther to the stigma of another flower of the same plant is called
  A)
  xenogamy          
  done clear
  B)
  geitonogamy                    
  done clear
  C)
  karyogamy         
  done clear
  D)
  autogamy
  done clear
  View Answer play_arrow

• question_answer124) The genotype of a plant showing the dominant phenotype can be determined by                   
  A)
  test cross       
  done clear
  B)
         dihybrid cross
  done clear
  C)
                         pedigree analysis            
  done clear
  D)
  back cross
  done clear
  View Answer play_arrow

• question_answer125) PGA as the first \[C{{O}_{2}}\]fixation product was discovered in photosynthesis of
  A)
  bryophyte          
  done clear
  B)
  gymnosperm    
  done clear
  C)
  angiosperm    
  done clear
  D)
         alga
  done clear
  View Answer play_arrow

• question_answer126) Study the four statements (1 - 4) given below and select the two correct ones out of them. (1) A lion eating a deer and a sparrow feeding on grain are ecologically similar in being consumers                                  (2) Predator star fish Pisaster helps in maintaining species diversity of some invertebrates (3) Predators ultimately lead to the extinction of prey species          (4) Production of chemicals such as nicotine, strychnine by the plants are metabolic disorders The two correct statements are
  A)
  (2) and (3)          
  done clear
  B)
  (3) and (4)          
  done clear
  C)
         (1) and (4)     
  done clear
  D)
         (1) and (2)
  done clear
  View Answer play_arrow

• question_answer127) Seminal plasma in human males is rich in
  A)
  fructose and calcium
  done clear
  B)
  glucose and calcium
  done clear
  C)
  DNA and testosterone
  done clear
  D)
  ribose and potassium
  done clear
  View Answer play_arrow

• question_answer128) ABO blood groups in humans are controlled by the gene I. It has three alleles \[\text{-}{{\text{I}}^{\text{A}}}\text{,}{{\text{I}}^{\text{B}}}\] and i. Since there are three different alleles, six different genotypes are possible. How many phenotypes can occur?
  A)
  Three                                   
  done clear
  B)
  One                      
  done clear
  C)
  Four                      
  done clear
  D)
         Two
  done clear
  View Answer play_arrow

• question_answer129) Breeding of crops with high levels of minerals, vitamins and proteins is called
  A)
  somatic hybridization
  done clear
  B)
  bio fortification
  done clear
  C)
  bio magnification
  done clear
  D)
  micro propagation
  done clear
  View Answer play_arrow

• question_answer130) A common bio control agent for the control of plant diseases is
  A)
  Baculovirus
  done clear
  B)
  Bacillus thuringierisis
  done clear
  C)
  Gibmus                
  done clear
  D)
          Trichoderma
  done clear
  View Answer play_arrow

• question_answer131) Widal test is used for the diagnosis of
  A)
  malaria                                
  done clear
  B)
  pneumonia                        
  done clear
  C)
  tuberculosis    
  done clear
  D)
         typhoid
  done clear
  View Answer play_arrow

• question_answer132) Injury to adrenal cortex is not likely to affect the secretion of which one of the following?
  A)
  Aldosterone
  done clear
  B)
  Both androstenedione and dehydroepiandrosterone
  done clear
  C)
  Adrenalin           
  done clear
  D)
         Cortisol
  done clear
  View Answer play_arrow

• question_answer133) Low \[C{{a}^{2+}}\]in the body fluid may be the cause of
  A)
  tetany                                  
  done clear
  B)
  anaemia              
  done clear
  C)
                         angina pectoris
  done clear
  D)
         gout
  done clear
  View Answer play_arrow

• question_answer134) Which one of the following pairs is incorrectly matched?
  A)
  Glucagon                             ? Beta cells (source)
  done clear
  B)
  Somatostatin                     ? Delta cells (source)
  done clear
  C)
  Corpus luteum                 ? Relaxin (secretion)
  done clear
  D)
  Insulin                                   ? Diabetes mellitus (disease)
  done clear
  View Answer play_arrow

• question_answer135) Select the correct statement from the ones given below with respect to dihybrid cross.
  A)
  Tightly linked genes on the same chromosome show higher recombinations
  done clear
  B)
  Genes far apart on the same chromosome show very few recombinations
  done clear
  C)
  Genes loosely linked on the same chromosome show similar recombinations as the tightly linked ones
  done clear
  D)
  Tightly linked genes on the same chromosome    show    very    few recombinations
  done clear
  View Answer play_arrow

• question_answer136) Which one of the following statements in regard to the excretion by the human kidneys is correct?
  A)
  Descending limb of Loop of Henie is impermeable to water
  done clear
  B)
  Distal convoluted tubule is incapable of reabsorbing\[HC{{O}_{3}}\]
  done clear
  C)
  Nearly 99 per cent of the glomerular filtrate is reabsorbed by the renal tubules
  done clear
  D)
  Ascending limb of loop of Henie is impermeable to electrolytes
  done clear
  View Answer play_arrow

• question_answer137) The nerve centres which control the body temperature and the urge for eating are contained in
  A)
  hypothalamus
  done clear
  B)
         pons                
  done clear
  C)
  cerebellum        
  done clear
  D)
         thalamus
  done clear
  View Answer play_arrow

• question_answer138) The biomass available for consumption by the herbivores and the decomposers is called
  A)
  net primary productivity
  done clear
  B)
  secondary productivity
  done clear
  C)
  standing crop
  done clear
  D)
  gross primary productivity
  done clear
  View Answer play_arrow

• question_answer139) If due to some injury the chordae tendinae of the tricuspid valve of the human heart is partially non-functional, what will be the immediate effect?
  A)
  The flow of blood into the aorta will be slowed down
  done clear
  B)
  The 'pacemaker' will stop working
  done clear
  C)
  The blood will tend to flow back into the left atrium
  done clear
  D)
  The flow of blood into the pulmonary artery will be reduced
  done clear
  View Answer play_arrow

• question_answer140) Ovary is half-inferior in the flowers of
  A)
  guava                                   
  done clear
  B)
  plum     
  done clear
  C)
         brinjal                  
  done clear
  D)
         cucumber
  done clear
  View Answer play_arrow

• question_answer141) Which one of the following is used as vector for cloning genes into higher organisms?
  A)
  Baculovirus
  done clear
  B)
  Salmonella typhimurium
  done clear
  C)
  Rhizopus nigricans
  done clear
  D)
  Retrovirus
  done clear
  View Answer play_arrow

• question_answer142) The one aspect which is not a salient feature of genetic code, is its being'
  A)
  degenerate       
  done clear
  B)
         ambiguous         
  done clear
  C)
         universal             
  done clear
  D)
         specific
  done clear
  View Answer play_arrow

• question_answer143) Which one of the following is an example of ex-situ conservation?
  A)
  Wildlife sanctuary           
  done clear
  B)
  Seed bank          
  done clear
  C)
         Sacred groves
  done clear
  D)
         National park
  done clear
  View Answer play_arrow

• question_answer144) Which one of the following palindromic base sequences in DNA can be easily cut at about the middle by some particular restriction enzyme?
  A)
  5' - CGTTCG - 3' 3' - ATGGTA - 5'
  done clear
  B)
  5' - GATATG - 3' 3' - CTACTA - 5'
  done clear
  C)
  5' - GAATTC - 3' 3' - CTTAAG - 5'
  done clear
  D)
  5' - CACGTA - 3' 3' - CTCAGT - 5'
  done clear
  View Answer play_arrow

• question_answer145) Which one of the following statements- is correct with respect to AIDS?
  A)
  The HIV can be transmitted through eating food together with an infected person       
  done clear
  B)
  Drug addicts are least susceptible to HIV infection
  done clear
  C)
  AIDS patients are being fully cured cent per cent with proper care and nutrition
  done clear
  D)
  The causative HIV retrovirus enters helper T-lymphocytes   thus   reducing their numbers
  done clear
  View Answer play_arrow

• question_answer146) Photottopic curvature is the result of uneven distribution of
  A)
  gibberellin  
  done clear
  B)
         phytochrome                   
  done clear
  C)
  cytokinins     
  done clear
  D)
         auxin
  done clear
  View Answer play_arrow

• question_answer147) The figure given below is a diagrammatic representation of response of organisms to abiotic factors. What do A, B and C represent respectively?
  A)
   A                             B                                             C Conformer                          Regulator                            Partial regulator
  done clear
  B)
  Regulator                            Partial regulator                Partial regulator
  done clear
  C)
  Partial regulator                Regulator                            Conformer
  done clear
  D)
  Regulator                            Conformer                          Partial regulator
  done clear
  View Answer play_arrow

• question_answer148) Male   and   female   gametophytes   are independent and free-living in
  A)
  mustard              
  done clear
  B)
         castor   
  done clear
  C)
         Pinus                    
  done clear
  D)
         Sphagnum
  done clear
  View Answer play_arrow

• question_answer149) The technical term used for the androecium in a flower of China rose (Hibiscus rosa sinensis) is
  A)
  monadelphous                
  done clear
  B)
  diadelphous      
  done clear
  C)
         polyandrous   
  done clear
  D)
         polyadelphous
  done clear
  View Answer play_arrow

• question_answer150) Virus envelope is known as
  A)
  capsid                  
  done clear
  B)
         virion    
  done clear
  C)
                         nucleoprotein  
  done clear
  D)
         core
  done clear
  View Answer play_arrow

• question_answer151) The permissible use of the technique amniocentesis is for
  A)
  detecting sex of the unborn foetus
  done clear
  B)
  artificial insemination
  done clear
  C)
  transfer of embryo into the uterus of a surrogate mother
  done clear
  D)
  detecting any genetic abnormality
  done clear
  View Answer play_arrow

• question_answer152) During mitosis ER and nucleolus begin to disappear at
  A)
  late prophase
  done clear
  B)
         early metaphase             
  done clear
  C)
  late metaphase
  done clear
  D)
         early prophase 
  done clear
  View Answer play_arrow

• question_answer153) The free-living, anaerobic nitrogen-fixer is
  A)
  Beijerinckia        
  done clear
  B)
  Rhodospirillum
  done clear
  C)
  Rhizobium          
  done clear
  D)
  Azotobacter                      
  done clear
  View Answer play_arrow

• question_answer154) DNA or RNA segment tagged with a radioactive molecule is called
  A)
  vector                  
  done clear
  B)
         probe   
  done clear
  C)
         clone                    
  done clear
  D)
         plasmid
  done clear
  View Answer play_arrow

• question_answer155) Darwin's finches are a good example of
  A)
  industrial melanism
  done clear
  B)
  connecting link
  done clear
  C)
  adaptive radiation
  done clear
  D)
  convergent evolution
  done clear
  View Answer play_arrow

• question_answer156) The signals for parturition originate from
  A)
  placenta only
  done clear
  B)
  placenta as well as fully developed foetus
  done clear
  C)
  oxytocin released from maternal pituitary
  done clear
  D)
  fully developed foetus only
  done clear
  View Answer play_arrow

• question_answer157) What is true about RBCs in humans?
  A)
  They carry about 20-25 per cent of \[C{{O}_{2}}\]
  done clear
  B)
  They transport 99.5 per cent of \[{{O}_{2}}\]
  done clear
  C)
  They transport about 80 per cent oxygen only and the rest 20 per cent of it is transported in' dissolved/ state in blood plasma
  done clear
  D)
  They do not carry \[C{{O}_{2}}\] at all
  done clear
  View Answer play_arrow

• question_answer158) Which stages of cell division do the following figures A and B represent respectively?
  A)
  Metaphase                         -     Telophase
  done clear
  B)
  Telophase                           -     Metaphase
  done clear
  C)
  Lateanaphase                    -     Prophase
  done clear
  D)
  Prophase                             -     Anaphase
  done clear
  View Answer play_arrow

• question_answer159) The main arena of various types of activities of a cell is
  A)
  plasma membrane         
  done clear
  B)
  mitochondrion 
  done clear
  C)
  cytoplasm          
  done clear
  D)
         nucleus               
  done clear
  View Answer play_arrow

• question_answer160) The common nitrogen-fixer in paddy fields is
  A)
  Rhizobium          
  done clear
  B)
  Azospirillum                      
  done clear
  C)
  Oscillatoria         
  done clear
  D)
  Frankia
  done clear
  View Answer play_arrow

• question_answer161) The principal nitrogenous excretory compound in humans is synthesized
  A)
  in kidneys but eliminated mostly through liver
  done clear
  B)
  in kidneys as well as eliminated by kidneys
  done clear
  C)
  in liver and also eliminated by the same through bile
  done clear
  D)
  in the liver, but eliminated mostly through kidneys
  done clear
  View Answer play_arrow

• question_answer162) Carrier ions like \[N{{a}^{+}}\] facilitate the absorption of substance like
  A)
  amino acids and glucose
  done clear
  B)
  glucose and fatty acids
  done clear
  C)
  fatty acids and glycerol
  done clear
  D)
  fructose and some amino acids
  done clear
  View Answer play_arrow

• question_answer163) Which one of the following symbols and its - representation, used in human pedigree analysis is correct?
  A)
  \[\square =\text{O=}\] Mating between relatives
  done clear
  B)
  \[\text{O=}\] Unaffected male
  done clear
  C)
  \[\square \text{=}\] Unaffected female
  done clear
  D)
  Male affected
  done clear
  View Answer play_arrow

• question_answer164) Which two of the following changes (1- 4) usually tend to occur in the plain dwellers when they move to high altitudes. (3,500 m or more)? (1) Increase in red blood cell size (2) Increase in red blood cell production (3) Increased breathing rate (4) Increase in thrombocyte count Changes occurring are
  A)
  (2) and (3)          
  done clear
  B)
  (3) and (4)          
  done clear
  C)
         (1) and (4)     
  done clear
  D)
         (1) and (2)
  done clear
  View Answer play_arrow

• question_answer165) Toxic agents present in food which ?interfere with  thyroxin  synthesis  lead  to  the development of
  A)
  toxic goitre        
  done clear
  B)
  cretinism            
  done clear
  C)
         simple goitre   
  done clear
  D)
         thyrotoxicosis
  done clear
  View Answer play_arrow

• question_answer166) If for some reason our goblet cells are non-functional, this will adversely affect
  A)
  production of somatostatin
  done clear
  B)
  secretion of sebum from the sebaceous glands
  done clear
  C)
  maturation of sperms
  done clear
  D)
  smooth movement of food down the intestine
  done clear
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• question_answer167) The plasma membrane consists mainly of
  A)
  phospholipids embedded in a protein bilayer
  done clear
  B)
  proteins embedded in a phospholipid bilayer           
  done clear
  C)
  proteins embedded in a polymer of glucose molecules
  done clear
  D)
  proteins embedded in a .carbohydrate bilayer    
  done clear
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• question_answer168) Which one of the following statements about all the four of Spongilla, leech, dolphin and penguin is correct?
  A)
  Penguin is hbmoiothermic while the remaining three are poikilothermic
  done clear
  B)
  Leech is a fresh water form while all others are marine
  done clear
  C)
  Spongilla has special collared cells called choanocytes, not found in the remaining three  
  done clear
  D)
  All are bilaterally symmetrical
  done clear
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• question_answer169) The first movements of the foetus and appearance of hair on its head are usually observed during which month of pregancy?
  A)
  Fourth month   
  done clear
  B)
  Fifth month       
  done clear
  C)
                         Sixth month      
  done clear
  D)
         Third month
  done clear
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• question_answer170) The scutellum observed in a grain of wheat or maize is comparable to which part of, the seed in other monocotyledons?
  A)
  Cotyledon        
  done clear
  B)
        Endosperm        
  done clear
  C)
         Aleurone layer   
  done clear
  D)
         Plumule                              
  done clear
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• question_answer171) Which one of the following kinds of animals are triploblastic?
  A)
  Flat worms    
  done clear
  B)
         Sponges              
  done clear
  C)
         Ctenophores   
  done clear
  D)
         Corals
  done clear
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• question_answer172) Which one of the following statements about certain given animals is correct?
  A)
  Round worms   (Aschelminthes) are pseudocoelomates
  done clear
  B)
  Molluscs are acoelpmates
  done clear
  C)
  Insects are pseudocoelomates
  done clear
  D)
  Flat worms (Platyhelminthes) are coelomates
  done clear
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• question_answer173) Cu ions released from copper-releasing Intra Uterine Devices (lUDs)
  A)
  make uterus unsuitable for implantation
  done clear
  B)
  increase phagocytosis of sperms
  done clear
  C)
  suppress sperm motility
  done clear
  D)
  prevent ovulation
  done clear
  View Answer play_arrow

• question_answer174) The energy-releasing metabolic process in which substrate is oxidised without an external electron acceptor is called
  A)
  glycolysis                            
  done clear
  B)
  fermentation    
  done clear
  C)
  aerobic respiration         
  done clear
  D)
  photorespiration
  done clear
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• question_answer175) Restriction endonucleases are enzymes which
  A)
  make cuts at specific positions within the  DNA molecule
  done clear
  B)
  recognize a specific nucleotide sequence for binding of DNA ligase
  done clear
  C)
  restrict the action of the enzyme DNA polymerase
  done clear
  D)
  remove nucleotides from the ends of the DNA molecule
  done clear
  View Answer play_arrow

• question_answer176) Which one of the following is not a lateral meristem?
  A)
  Intrafascicular cambium
  done clear
  B)
  Interfascicular cambium
  done clear
  C)
  Phellogen
  done clear
  D)
  Intercalary meristem
  done clear
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• question_answer177) A renewable exhaustible natural resource is
  A)
  coal  
  done clear
  B)
                                         petroleum                         
  done clear
  C)
  minerals       
  done clear
  D)
         forest
  done clear
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• question_answer178) Photoperiodism was first characterised in
  A)
  tobacco
  done clear
  B)
                                        potato 
  done clear
  C)
         tomato                
  done clear
  D)
         cotton
  done clear
  View Answer play_arrow

• question_answer179) \[{{\text{C}}_{\text{4}}}\text{-}\]plants are more efficient in photosynthesis than \[{{\text{C}}_{3}}\text{-}\]plants due to
  A)
  higher leaf area
  done clear
  B)
  presence of larger number of chloroplasts in the leaf cells
  done clear
  C)
  presence of thin cuticle
  done clear
  D)
  lower rate of photorespiration
  done clear
  View Answer play_arrow

• question_answer180) Algae have cell wall made up of
  A)
  cellulose, galactans and mannans
  done clear
  B)
  hemicellulose, pectins and proteins
  done clear
  C)
  pectins, cellulose and proteins
  done clear
  D)
  cellulose, hemicellulose and pectins
  done clear
  View Answer play_arrow

• question_answer181) Some hyperthermophilic organisms that grow in highly acidic (pH 2) habitats belong to the two groups called
  A)
  eubacteria and archaea
  done clear
  B)
  cyanobacteria and diatoms
  done clear
  C)
  protists and mosses
  done clear
  D)
  liverworts and yeasts
  done clear
  View Answer play_arrow

• question_answer182) Genetic engineering has been successfully used for producing
  A)
  transgenic mice for testing safety of polio vaccine before use in humans
  done clear
  B)
  transgenic models for studying new treatments for certain cardiac diseases
  done clear
  C)
  transgenic cow-Rosie which produces high fat milk for making ghee
  done clear
  D)
  animals like bulls for farm work-as they have super power
  done clear
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• question_answer183) Some of the characteristics of Bt cotton are
  A)
  long fibre and resistance to aphids
  done clear
  B)
  medium yield, long fibre and resistance to beetle pests
  done clear
  C)
  high yield and production of toxic protein crystals which kill dipteran pests
  done clear
  D)
  high yield and resistance to bollworms
  done clear
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• question_answer184) Heartwood differs from sapwood in
  A)
  presence of rays and fibres
  done clear
  B)
  absence of vessels and parenchyma
  done clear
  C)
  having dead and non-conducting elements
  done clear
  D)
  being susceptible to pests and pathogens
  done clear
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• question_answer185) Satellite DNA is useful tool in
  A)
  organ transplantation
  done clear
  B)
  sex determination
  done clear
  C)
  forensic science
  done clear
  D)
  genetic engineering
  done clear
  View Answer play_arrow

• question_answer186) The second maturation division of the mammalian ovum occurs
  A)
  shortly after ovulation before the ovum makes entry into the Fallopian tube
  done clear
  B)
  until after the ovum has been penetrated by a sperm
  done clear
  C)
  until the nucleus of the sperm has fused with that of the ovum
  done clear
  D)
  in the Graafian follicle following the first maturation division
  done clear
  View Answer play_arrow

• question_answer187) Which one of the following does not follow the central dogma of molecular biology?
  A)
  Pea                                       
  done clear
  B)
  Mucor                  
  done clear
  C)
  Chlamydomonas             
  done clear
  D)
  HIV
  done clear
  View Answer play_arrow

• question_answer188) Which one of the following statements about human sperm is correct?
  A)
  Acrosome has a conical pointed structure used for piercing and penetrating the egg, resulting in fertilization
  done clear
  B)
  The sperm lysins in the acrosome dissolve the egg envelope facilitating fertilization
  done clear
  C)
  Acrosome serves as a sensory structure leading the sperm towards the ovum
  done clear
  D)
  Acrosome serves no particular function
  done clear
  View Answer play_arrow

• question_answer189) Consider the following four statements (1-4) regarding kidney transplant and select the two correct ones out of these. (1) Even if a kidney transplant is proper the recipient    may   need    to    take immune-suppresants for a long time (2) The cell-mediated immune response is responsible for the graft rejection (3) The B-lymphocytes are responsible for rejection of the graft (4) The acceptance of rejection of a kidney transplant depends on specific interferon?s The two correct statements are
  A)
  (2) and (3)          
  done clear
  B)
  (3) and (4)                                          
  done clear
  C)
  (1) and (3)     
  done clear
  D)
         (1) and (2)
  done clear
  View Answer play_arrow

• question_answer190) Wind pollinated flowers are
  A)
  small, brightly coloured, producing large number of pollen grains
  done clear
  B)
  small, producing large number of dry pollen grains
  done clear
  C)
  large, producing abundant nectar and pollen
  done clear
  D)
  small, producing nectar and dry pollen
  done clear
  View Answer play_arrow

• question_answer191) dB is a standard abbreviation used for the quantitative expression of
  A)
  the density of bacteria in a medium
  done clear
  B)
  a particular pollutant
  done clear
  C)
  the dominant Bacillus in a culture
  done clear
  D)
  a certain pesticide
  done clear
  View Answer play_arrow

• question_answer192) Which one of the following is one of the characteristics of a biological community?
  A)
  Stratification     
  done clear
  B)
  Natality
  done clear
  C)
         Mortality      
  done clear
  D)
         Sex-ratio
  done clear
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• question_answer193) Which one of the following statements about morula in humans is correct?
  A)
  It has almost equal quantity of cytoplasm as an uncleaved zygote but much more DNA
  done clear
  B)
  It has far less cytoplasm as well as less DNA than in an uncleaved zygote
  done clear
  C)
  It has more or less equal quantity of cytoplasm and DNA as in uncleaved zygote
  done clear
  D)
  It has more cytoplasm and more DNA than an uncleaved zygote
  done clear
  View Answer play_arrow

• question_answer194) Coiling of garden pea tendrils around any support is an example of   
  A)
  thigmotaxis       
  done clear
  B)
  thigmonasty      
  done clear
  C)
         thigmotropism                 
  done clear
  D)
  thermotaxis                      
  done clear
  View Answer play_arrow

• question_answer195) The two gases making highest relative contribution to the greenhouse gases are
  A)
  \[C{{O}_{2}}\]and\[C{{H}_{4}}\]  
  done clear
  B)
         \[C{{H}_{4}}\] and \[N{{O}_{2}}\]
  done clear
  C)
                         CFCs and \[{{N}_{2}}O\]  
  done clear
  D)
         \[C{{O}_{2}}\] and \[{{N}_{2}}O\]
  done clear
  View Answer play_arrow

• question_answer196) Which one of the following is not used in organic farming?
  A)
  Glomus      
  done clear
  B)
                         Earthworm        
  done clear
  C)
         Oscillatoria    
  done clear
  D)
         Snail
  done clear
  View Answer play_arrow

• question_answer197) Stirred-tank bioreactors have been designed for
  A)
  addition of preservatives of the product
  done clear
  B)
  purification of the product
  done clear
  C)
  ensuring anaerobic conditions in the culture vessel
  done clear
  D)
  availability of oxygen throughout the process
  done clear
  View Answer play_arrow

• question_answer198) The part of fallopian tube closest to the ovary is
  A)
  isthmus                               
  done clear
  B)
  infundibulum                    
  done clear
  C)
  cervix                                   
  done clear
  D)
  ampulla
  done clear
  View Answer play_arrow

• question_answer199) An improved variety of transgenic basmati rice
  A)
  does not require chemical fertilizers and growth hormones
  done clear
  B)
  gives high yield and is rich in vitamin-A
  done clear
  C)
  is completely resistant to all insect pests and diseases of paddy
  done clear
  D)
  gives high yield but has no characteristic aroma
  done clear
  View Answer play_arrow

• question_answer200) Infectious proteins are present in
  A)
  gemini viruses  
  done clear
  B)
         prions  
  done clear
  C)
         viroids                  
  done clear
  D)
         satellite viruses
  done clear
  View Answer play_arrow