Solved papers for NEET AIPMT SOLVED PAPER SCREENING 2008

done AIPMT SOLVED PAPER SCREENING 2008 Total Questions - 200

• question_answer1) If the lattice parameter for a crystalline structure is \[3.6\,\overset{\text{o}}{\mathop{\text{A}}}\,,\] then the atomic radius in fee crystal is
  A)
  \[1.81\,\overset{\text{o}}{\mathop{\text{A}}}\,\]                                          
  done clear
  B)
  \[2.10\,\overset{\text{o}}{\mathop{\text{A}}}\,\]            
  done clear
  C)
                         \[2.92\,\overset{\text{o}}{\mathop{\text{A}}}\,\]         
  done clear
  D)
                         \[1.27\,\overset{\text{o}}{\mathop{\text{A}}}\,\]
  done clear
  View Answer play_arrow

• question_answer2) If the error in the measurement of radius of a sphere is. 2%, then the error in the determination of volume of the sphere will be
  A)
  4%                         
  done clear
  B)
                         6%
  done clear
  C)
  8%                         
  done clear
  D)
                         2%
  done clear
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• question_answer3) The electric potential at a point in free space due to a charge Q coulomb is \[Q\times {{10}^{11}}V.\] The electric field at that point is
  A)
  \[4\pi {{\varepsilon }_{0}}Q\times {{10}^{22}}V/m\]
  done clear
  B)
         \[12\pi {{\varepsilon }_{0}}Q\times {{10}^{20}}V/m\]
  done clear
  C)
  \[4\pi {{\varepsilon }_{0}}Q\times {{10}^{20}}V/m\]
  done clear
  D)
         \[12\pi {{\varepsilon }_{0}}Q\times {{10}^{22}}V/m\]
  done clear
  View Answer play_arrow

• question_answer4) The voltage gain of an amplifier with 9% negative feedback is 10. The voltage gain without feedback will be
  A)
  90                                          
  done clear
  B)
  10
  done clear
  C)
  1.25                       
  done clear
  D)
         100
  done clear
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• question_answer5) The energy required to charge a parallel plate condenser of plate separation a and plate area of cross-section A such that the uniform electric field between the plates is E, is
  A)
  \[\frac{1}{2}{{\varepsilon }_{0}}{{E}^{2}}/Ad\]   
  done clear
  B)
         \[{{\varepsilon }_{0}}{{E}^{2}}/Ad\]
  done clear
  C)
  \[{{\varepsilon }_{0}}{{E}^{2}}Ad\]          
  done clear
  D)
         \[\frac{1}{2}{{\varepsilon }_{0}}{{E}^{2}}Ad\]
  done clear
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• question_answer6) A roller coaster is designed such that riders experience "weightlessness" as they go round the top of a hill whose radius of curvature is 20 m. The speed of the car at the top of the hill is between  
  A)
  14 m/s and 15m/s                           
  done clear
  B)
  15 m/s and 16 m/s
  done clear
  C)
  16 m/s and 17 m/s          
  done clear
  D)
  13 m/s and 14 m/s
  done clear
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• question_answer7) The ratio of the radii of gyration of a circular disc to that of a circular ring, each of same mass and radius, around their respective axes is
  A)
  \[\sqrt{3}:\sqrt{2}\]       
  done clear
  B)
         \[1:\sqrt{2}\]
  done clear
  C)
  \[\sqrt{2}:1\]                    
  done clear
  D)
  \[\sqrt{2}:\sqrt{3}\]
  done clear
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• question_answer8) The work function of a surface of a photosensitive material is 6.2 eV. The wavelength, of the incident radiation for which the stopping potential is 5 V lies in the     
  A)
  ultraviolet region
  done clear
  B)
  visible region
  done clear
  C)
  infrared region 
  done clear
  D)
  X-ray region
  done clear
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• question_answer9) The ground state energy of hydrogen atom is -13.6 eV. When its electron is in the first excited state, its excitation energy is
  A)
  3.4 eV
  done clear
  B)
                                         6.8 eV
  done clear
  C)
  10.2 eV                
  done clear
  D)
  zero
  done clear
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• question_answer10) A current of 3 A flows through the \[2\Omega \] resistor shown in the circuit. The power dissipated in the \[5\Omega \] resistor is
  A)
  4 W
  done clear
  B)
                                         2 W
  done clear
  C)
  1 W                                       
  done clear
  D)
  5 W
  done clear
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• question_answer11) A p-n photodiode is made of a material with a band gap of 2.0 eV. The minimum frequency of the radiation that can be absorbed by the material is nearly                       
  A)
  \[10\times {{10}^{14}}Hz\]                          
  done clear
  B)
  \[5\times {{10}^{14}}Hz\]
  done clear
  C)
  \[1\times {{10}^{14}}Hz\]                            
  done clear
  D)
  \[20\times {{10}^{14}}Hz\]
  done clear
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• question_answer12) Water falls from a height of 60 m at the rate of 15 kg/s to operate a turbine. The losses due to frictional forces are 10% of energy. How much power is  generated by the turbine? \[(g=10\,m/{{s}^{2}})\]
  A)
  8.1 kW                                 
  done clear
  B)
  10.2 kW
  done clear
  C)
  12.3 kW               
  done clear
  D)
  7.0 kW
  done clear
  View Answer play_arrow

• question_answer13) On a new scale of temperature (which is linear) and called the W scale, the freezing and boiling points of water are \[{{39}^{\text{o}}}W\] and \[{{239}^{\text{o}}}W\] respectively. What will be the temperature on the new scale, corresponding to a temperature of \[{{39}^{\text{o}}}C\] on the Celsius scale?        
  A)
  \[{{78}^{\text{o}}}W\]
  done clear
  B)
                                         \[{{117}^{\text{o}}}W\]
  done clear
  C)
  \[{{200}^{\text{o}}}W\]               
  done clear
  D)
  \[{{139}^{\text{o}}}W\]
  done clear
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• question_answer14) If Q, E and W denote respectively the heat added, change in internal energy and the work done in a closed cycle process, then
  A)
  W = 0                    
  done clear
  B)
         Q = W = 0                            
  done clear
  C)
  E = 0       
  done clear
  D)
  Q = 0
  done clear
  View Answer play_arrow

• question_answer15) Two simple harmonic motions of angular frequency 100 and \[1000\,\,rad\,\,{{s}^{-1}}\] have the same displacement amplitude. The ratio of their maximum acceleration is
  A)
  1 : 10                     
  done clear
  B)
  \[1:{{10}^{2}}\]
  done clear
  C)
  \[1:{{10}^{3}}\]                                
  done clear
  D)
  \[1:{{10}^{4}}\]
  done clear
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• question_answer16) A closed loop PQRS carrying a current is placed in a uniform magnetic field. If the magnetic forces on segments PS, SR and RQ. are \[{{F}_{1}},{{F}_{2}}\] and \[{{F}_{3}}\]respectively and are in the plane of the paper  and    along    the directions shown, the force on the segment QP is
  A)
  \[{{F}_{3}}-{{F}_{1}}-{{F}_{2}}\]
  done clear
  B)
         \[\sqrt{{{({{F}_{3}}-{{F}_{1}})}^{2}}+F_{2}^{2}}\]
  done clear
  C)
  \[\sqrt{{{({{F}_{3}}-{{F}_{1}})}^{2}}-F_{2}^{2}}\]               
  done clear
  D)
  \[{{F}_{3}}-{{F}_{1}}+{{F}_{2}}\]
  done clear
  View Answer play_arrow

• question_answer17) Two radioactive materials \[{{X}_{1}}\] and \[{{X}_{2}}\] have decay constants \[5\lambda \] and \[\lambda \] respectively. If initially they have the same number of nuclei, then the ratio of the number of nuclei of \[{{X}_{1}}\] to that of \[{{X}_{2}}\]will be \[\frac{1}{e}\] after a time      
  A)
  \[\lambda \]
  done clear
  B)
                                         \[\frac{1}{2}\lambda \]
  done clear
  C)
  \[\frac{1}{4\lambda }\] 
  done clear
  D)
  \[\frac{e}{\lambda }\]
  done clear
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• question_answer18) Two thin lenses of focal lengths \[{{f}_{1}}\] and \[{{f}_{2}}\] are in contact and coaxial. The power of the combination is
  A)
  \[\sqrt{\frac{{{f}_{1}}}{{{f}_{2}}}}\]                         
  done clear
  B)
         \[\sqrt{\frac{{{f}_{2}}}{{{f}_{1}}}}\]
  done clear
  C)
  \[\frac{{{f}_{1}}+{{f}_{2}}}{{{f}_{1}}{{f}_{2}}}\]                  
  done clear
  D)
  \[\frac{{{f}_{1}}+{{f}_{2}}}{{{f}_{1}}{{f}_{2}}}\]
  done clear
  View Answer play_arrow

• question_answer19) The distance travelled by a particle starting from rest and moving with an acceleration \[\frac{4}{3}m{{s}^{-2}},\]in the third second is
  A)
  6 m         
  done clear
  B)
                         4 m
  done clear
  C)
  \[\frac{10}{3}m\]           
  done clear
  D)
  \[\frac{19}{3}m\]
  done clear
  View Answer play_arrow

• question_answer20) The circuit is equivalent to
  A)
  AND gate            
  done clear
  B)
  NAND gate
  done clear
  C)
  NOR gate  
  done clear
  D)
  OR gate
  done clear
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• question_answer21) A particle mass m, charge Q and kinetic energy T enters a transverse uniform magnetic field of induction \[\overrightarrow{B}.\] After 3 s the kinetic energy of the particle will be
  A)
  3T    
  done clear
  B)
                                         2T
  done clear
  C)
  T                             
  done clear
  D)
  AT
  done clear
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• question_answer22) A wire of a certain material is stretched slowly by ten per cent. Its new resistance and specific resistance become respectively
  A)
  1.2 times, 1.1 times
  done clear
  B)
  1.21 times, same
  done clear
  C)
  both remain the same
  done clear
  D)
  1.1 times, 1.1 times
  done clear
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• question_answer23) An electric kettle takes 4 A current at 220 V. How much time will it take to boil 1 kg of water from temperature 20°C? The temperature of boiling water is 100°C
  A)
  6.3 min
  done clear
  B)
         8.4 min
  done clear
  C)
  12.6 min
  done clear
  D)
  4.2 min
  done clear
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• question_answer24) In the phenomenon of electric discharge through gases at low pressure, the coloured glow in the tube appears as a result of
  A)
  excitation of electrons in the atoms
  done clear
  B)
  collision between the atoms of the gas
  done clear
  C)
  collisions between the charged particles  emitted from the cathode and the atoms of the gas
  done clear
  D)
  collision between different electrons of the atoms of the gas
  done clear
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• question_answer25) A particle of mass 1 mg has the same wavelength as an electron moving with a velocity of \[3\times {{10}^{6}}\text{m}{{\text{s}}^{-1}}\]The velocity of the Particle is
  A)
  \[2.7\times {{10}^{-18}}\text{m}{{\text{s}}^{-1}}\]
  done clear
  B)
  \[9\times {{10}^{-2}}\text{m}{{\text{s}}^{-1}}\]
  done clear
  C)
  \[3\times {{10}^{-31}}\text{m}{{\text{s}}^{-1}}\]                             
  done clear
  D)
  \[2.7\times {{10}^{-21}}\text{m}{{\text{s}}^{-1}}\] (Mass of electron\[=\text{ }9.1\times {{10}^{-}}^{31}kg\])
  done clear
  View Answer play_arrow

• question_answer26) A particle shows distance-time curve as given in this figure. The maximum instantaneous velocity of the particle is around the point
  A)
  B      
  done clear
  B)
                                         C
  done clear
  C)
  D                                            
  done clear
  D)
  A
  done clear
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• question_answer27) A cell can be balanced against 110 cm and 100 cm of potentiometer wire, respectively with and without being short circuited through a resistance of \[10\Omega .\]Its internal resistance is
  A)
  \[1.0\,\Omega \]                             
  done clear
  B)
  \[0.5\,\Omega \]
  done clear
  C)
  \[2.0\,\Omega \]                             
  done clear
  D)
  zero
  done clear
  View Answer play_arrow

• question_answer28) If M (A, Z), \[{{M}_{p}}\] and M,, denote the masses of the nucleus \[_{Z}^{A}X,\]proton and neutron respectively       in       units      of \[u(1u=931.5MeV/{{c}^{2}})\] and BE represents its binding energy in MeV, then
  A)
  \[M(A,Z)=Z{{M}_{p}}+(A-Z){{M}_{n}}-BE/{{c}^{2}}\]
  done clear
  B)
  \[M(A,Z)=Z{{M}_{p}}+(A-Z){{M}_{n}}+BE\]
  done clear
  C)
  \[M(A,Z)=Z{{M}_{p}}+(A-Z){{M}_{n}}-BE\]
  done clear
  D)
  \[M(A,Z)=Z{{M}_{p}}+(A-Z){{M}_{n}}-BE/{{c}^{2}}\]
  done clear
  View Answer play_arrow

• question_answer29) Three   forces acting on a body are shown in the figure To have the resultant force only along the y-direction, the magnitude of the minimum additional force needed is
  A)
   0.5 N   
  done clear
  B)
                         1.5 N
  done clear
  C)
  \[\frac{\sqrt{3}}{4}N\]                  
  done clear
  D)
  \[\sqrt{3}\,N\]                   
  done clear
  View Answer play_arrow

• question_answer30) Two periodic waves of intensities \[{{I}_{1}}\] and \[{{I}_{2}}\] pass through a region at the same time in the same direction. The sum of the maximum and minimum intensities is                
  A)
  \[{{I}_{1}}+{{I}_{2}}\]    
  done clear
  B)
         \[{{(\sqrt{{{I}_{1}}}+\sqrt{{{I}_{2}}})}^{2}}\]
  done clear
  C)
  \[{{(\sqrt{{{I}_{1}}}-\sqrt{{{I}_{2}}})}^{2}}\]                        
  done clear
  D)
  \[2(\sqrt{{{I}_{1}}}+\sqrt{{{I}_{2}}})\]
  done clear
  View Answer play_arrow

• question_answer31) A shell of mass 200 g is ejected from a gun of mass 4 kg by an explosion that generates 1.05 kJ of energy. The initial velocity of the shell is
  A)
  100 \[m{{s}^{-1}}\]  
  done clear
  B)
                         \[80\,m{{s}^{-1}}\]
  done clear
  C)
  \[40\,m{{s}^{-1}}\]
  done clear
  D)
  \[120\,m{{s}^{-1}}\]
  done clear
  View Answer play_arrow

• question_answer32) A thin conducting ring of radius R is given a charge +Q.    The electric field at the centre O of the ring due to the charge on the part AKB of the ring is E.          The electric field at the centre due to the charge on the part ACDB of the ring is
  A)
  3E along KO       
  done clear
  B)
  E along OK          
  done clear
  C)
  E along KO          
  done clear
  D)
  3 E along OK
  done clear
  View Answer play_arrow

• question_answer33) The velocity of electromagnetic radiation in a medium of permittivity \[{{\varepsilon }_{0}}\] and permeability \[{{\mu }_{0}}\] is given by
  A)
  \[\sqrt{\frac{{{\varepsilon }_{0}}}{{{\mu }_{0}}}}\]          
  done clear
  B)
         \[\sqrt{{{\mu }_{0}}{{\varepsilon }_{0}}}\]
  done clear
  C)
  \[\frac{1}{\sqrt{{{\mu }_{0}}{{\varepsilon }_{0}}}}\]        
  done clear
  D)
         \[\sqrt{\frac{{{\mu }_{0}}}{{{\varepsilon }_{0}}}}\]
  done clear
  View Answer play_arrow

• question_answer34) A point performs simple harmonic oscillation of period T and the equation of motion is given by \[x=c\sin (\omega t+\pi /6).\] After the elapse of what fraction of the time period the velocity of the point will be equal to half of its maximum velocity?
  A)
  \[\frac{T}{8}\]   
  done clear
  B)
                         \[\frac{T}{6}\]
  done clear
  C)
  \[\frac{T}{3}\]                                   
  done clear
  D)
  \[\frac{T}{12}\]
  done clear
  View Answer play_arrow

• question_answer35) A long solenoid has 500 rums. When a current of 2 A is passed through it, the resulting magnetic flux linked with each turn of the solenoid is \[4\times {{10}^{-3}}\]Wb. The self-inductance of the solenoid is
  A)
  2.5 H      
  done clear
  B)
                         2.0 H
  done clear
  C)
  1.0 H
  done clear
  D)
  4.0 H
  done clear
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• question_answer36) A boy is trying to start a fire by focusing sunlight on a piece of paper using an equiconvex lens of focal length 10 cm. The diameter of the sun is \[1.39\times {{10}^{9}}m\]and its mean distance from the earth is \[1.5\times {{10}^{11}}m\]. What is the diameter of the sun's image on  the paper?
  A)
  \[9.2\times {{10}^{-4}}m\]          
  done clear
  B)
  \[6.5\times {{10}^{-4}}m\]
  done clear
  C)
  \[6.5\times {{10}^{-5}}m\]                          
  done clear
  D)
  \[12.4\times {{10}^{-4}}m\]
  done clear
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• question_answer37) In an AC circuit the emf (e) and the current (i) at any instant are given respectively by \[e={{E}_{0}}\sin \omega t\] \[i={{I}_{0}}\sin (\omega t-\phi )\] The average power in the circuit over one cycle of AC is
  A)
  \[\frac{{{E}_{0}}{{I}_{0}}}{2}\]   
  done clear
  B)
         \[\frac{{{E}_{0}}{{I}_{0}}}{2}\sin \phi \]
  done clear
  C)
  \[\frac{{{E}_{0}}{{I}_{0}}}{2}\cos \phi \]
  done clear
  D)
         \[{{E}_{0}}{{I}_{0}}\]
  done clear
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• question_answer38) In the circuit shown, the current through the \[4\Omega \]resistor is 1 A when the points P and M are connected to a DC voltage source. The potential difference between the points M and N is
  A)
  1.5V  
  done clear
  B)
                                         1.0 V
  done clear
  C)
  0.5 V                     
  done clear
  D)
         3.2 V
  done clear
  View Answer play_arrow

• question_answer39) A particle moves in a straight line with a constant acceleration. It changes its velocity from 10 \[\text{m}{{\text{s}}^{\text{-1}}}\] to 20 \[\text{m}{{\text{s}}^{\text{-1}}}\] while passing through a distance 135 m in t- second. The value of t is
  A)
  10                 
  done clear
  B)
         1.8
  done clear
  C)
  12                                          
  done clear
  D)
  9
  done clear
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• question_answer40) A thin rod of length L and mass M is bent at its midpoint into two halves so that the angle between them is 90°. The moment of inertia of the bent rod about an axis passing through the bending point and perpendicular to the plane defined by the two halves of the rod is
  A)
  \[\frac{M{{L}^{2}}}{24}\]             
  done clear
  B)
         \[\frac{M{{L}^{2}}}{12}\]
  done clear
  C)
  \[\frac{M{{L}^{2}}}{6}\]                
  done clear
  D)
  \[\frac{\sqrt{2}M{{L}^{2}}}{24}\]
  done clear
  View Answer play_arrow

• question_answer41)  A circular disc of radius 0.2 m is placed in a uniform magnetic field of induction \[\frac{1}{\pi }\left( \frac{Wb}{{{m}^{2}}} \right)\] in such a way that its axis makes an angle of 60° with \[\overrightarrow{B}.\]The magnetic flux linked with the disc is
  A)
  0.02 Wb               
  done clear
  B)
  0.06 Wb
  done clear
  C)
  0.08 Wb       
  done clear
  D)
        0.01 Wb
  done clear
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• question_answer42) A particle of mass m is projected with velocity v making an angle of 45° with the horizontal. When the particle lands on the level ground the magnitude of the change in its momentum will be
  A)
  2mv       
  done clear
  B)
                         \[mv/\sqrt{2}\]
  done clear
  C)
  \[mv\sqrt{2}\]       
  done clear
  D)
  zero
  done clear
  View Answer play_arrow

• question_answer43) Two points are located at a distance of 10 m and 15 m from the source of oscillation. The period of oscillation is 0.05 s and the velocity of the wave is 300 m/s. What is the phase difference between the oscillations of two points?
  A)
  \[\frac{\pi }{3}\]              
  done clear
  B)
                         \[\frac{2\pi }{3}\]
  done clear
  C)
  \[\pi \]                 
  done clear
  D)
         \[\frac{\pi }{6}\]
  done clear
  View Answer play_arrow

• question_answer44) Two nuclei have their mass numbers in the ratio of 1 : 3. The ratio of their, nuclear densities would be
  A)
  1 : 3                                       
  done clear
  B)
  3 : 1
  done clear
  C)
  \[{{(3)}^{1/3}}:1\]                           
  done clear
  D)
  1 : 1
  done clear
  View Answer play_arrow

• question_answer45) Sand is being dropped on a conveyor belt at the rate of M kg/s. The force necessary to keep the belt moving with a constant velocity of v m/s will be
  A)
  Mv newton     
  done clear
  B)
        2Mv newton
  done clear
  C)
  \[\frac{Mv}{2}\]newton              
  done clear
  D)
  zero
  done clear
  View Answer play_arrow

• question_answer46) The wave described by \[y=0.25\sin (10\pi x-2\pi t),\]where x and y are in metre and t in second, is a wave travelling along the
  A)
  - ve x direction with frequency 1 Hz
  done clear
  B)
  + ve x direction with frequency \[\pi \] Hz and wavelength \[\lambda =0.2m\]
  done clear
  C)
  + ve x direction with frequency 1 Hz and wavelength \[\lambda =0.2m\]
  done clear
  D)
  -ve x direction with amplitude 0.25 m and wavelength \[\lambda =0.2m\]
  done clear
  View Answer play_arrow

• question_answer47) Curie temperatures is the temperature above which
  A)
  ferromagnetic                   material               becomes             paramagnetic material
  done clear
  B)
  paramagnetic                     material               becomes             diamagnetic material                       
  done clear
  C)
  paramagnetic                    material               becomes             ferromagnetic material
  done clear
  D)
  ferromagnetic                   material               becomes             diamagnetic material                        
  done clear
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• question_answer48) At 10°C the value of the density of a fixed mass of an ideal gas divided by its pressure is x. At 110°C this ratio is                                    
  A)
  x                             
  done clear
  B)
         \[\frac{383}{283}x\]
  done clear
  C)
  \[\frac{10}{110}x\]                         
  done clear
  D)
  \[\frac{283}{383}x\]
  done clear
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• question_answer49) Which two of the following five physical parameters have the same dimensions? (A) energy density (B) refractive index                                 (C) dielectric constant (D) Young's modulus                               (E) magnetic field                                
  A)
  2 and 4         
  done clear
  B)
         3 and 5 
  done clear
  C)
         1 and 4                                 
  done clear
  D)
  1 and 5                
  done clear
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• question_answer50) A galvanometer of resistance \[50\,\,\Omega \] is connected to a battery of 3 V along with a resistance of \[2950\,\,\Omega \] in series. A full scale deflection of 30 divisions is obtained in the galvanometer. In order to reduce this deflection to 20 divisions, the resistance in series should be
  A)
  \[5050\,\,\Omega \]
  done clear
  B)
         \[5550\,\,\Omega \]
  done clear
  C)
  \[6050\,\,\Omega \]                      
  done clear
  D)
  \[4450\,\,\Omega \]
  done clear
  View Answer play_arrow

• question_answer51) Equal volumes of three acid solutions of pH 3, 4 and 5 are mixed in a vessel. What will be the \[{{H}^{+}}\] ion concentration in the mixture?
  A)
  \[1.11\times {{10}^{-4}}M\]                       
  done clear
  B)
  \[3.7\times {{10}^{-4}}M\]
  done clear
  C)
  \[3.7\times {{10}^{-3}}M\]          
  done clear
  D)
  \[1.11\times {{10}^{-3}}M\]
  done clear
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• question_answer52) Acetophenone when reacted with a base, \[{{C}_{2}}{{H}_{5}}ONa,\] yields a stable compound which has the structure
  A)
  
  done clear
  B)
  
  done clear
  C)
  
  done clear
  D)
  
  done clear
  View Answer play_arrow

• question_answer53) The angular shape of ozone molecule \[({{O}_{3}})\]consists of
  A)
  1 sigma and 2 pi bonds
  done clear
  B)
  2 sigma and 2 pi bonds
  done clear
  C)
  1 sigma and 1 pi bonds
  done clear
  D)
  2 sigma and 1 pi bonds
  done clear
  View Answer play_arrow

• question_answer54) On the basis of the following \[{{E}^{\text{o}}}\] values, the strongest oxidising agent is \[{{[Fe{{(CN)}_{6}}]}^{4-}}\to {{[Fe{{(CN)}_{6}}]}^{3-}}]+{{e}^{-}};\] \[{{E}^{o}}=-0.35V\] \[F{{e}^{2+}}\to F{{e}^{3+}}+{{e}^{-}};{{E}^{o}}=-0.77V\]
  A)
  \[{{[Fe{{(CN)}_{6}}]}^{4-}}\]      
  done clear
  B)
         \[F{{e}^{2+}}\]
  done clear
  C)
  \[F{{e}^{3+}}\] 
  done clear
  D)
  \[{{[Fe{{(CN)}_{6}}]}^{3-}}\]
  done clear
  View Answer play_arrow

• question_answer55) Green chemistry means such reactions which
  A)
  produce colour during reactions
  done clear
  B)
  reduce the use and production of hazardous chemicals
  done clear
  C)
  are related to the! depletion of ozone layer
  done clear
  D)
  study the reactions in plants
  done clear
  View Answer play_arrow

• question_answer56) Which of the following are not state functions? (I) q + W                               (II) q (III) W                                   (IV) H-TS
  A)
  (I) and (IV) 
  done clear
  B)
         (II), (III) and (IV)
  done clear
  C)
  (I), (II) and (III)                 
  done clear
  D)
  (II) and (III)
  done clear
  View Answer play_arrow

• question_answer57) If uncertainty in position and momentum are equal, then uncertainty in velocity is
  A)
  \[\frac{1}{2m}\sqrt{\frac{h}{\pi }}\]
  done clear
  B)
                         \[\sqrt{\frac{h}{2\pi }}\]
  done clear
  C)
  \[\frac{1}{m}\sqrt{\frac{h}{\pi }}\]          
  done clear
  D)
         \[\sqrt{\frac{h}{\pi }}\]
  done clear
  View Answer play_arrow

• question_answer58) The correct order of decreasing second ionisation enthalpy of Ti (22), V (23), Cr (24) and Mn(25) is
  A)
  \[Cr>Mn>V>Ti\]              
  done clear
  B)
  \[V>Mn>Cr>Ti\]
  done clear
  C)
  \[Mn>Cr>Ti>V\]              
  done clear
  D)
  \[Ti>V>Cr>Mn\]
  done clear
  View Answer play_arrow

• question_answer59) The relative reactivities of acyl compounds towards nucleophilic substitution are in the order of
  A)
  Acyl chloride > Acid anhydride > Ester > Amide
  done clear
  B)
  Ester > Acyl chloride > Amide >Acid anhydride
  done clear
  C)
  Acid anhydride > Amide, > Ester > Acyl chloride
  done clear
  D)
  Acyl chloride > Ester > Acid anhydride > Amide
  done clear
  View Answer play_arrow

• question_answer60) Kohlrausch's law states that at
  A)
  finite dilution, each ion makes definite contribution to equivalent conductance of an electrolyte, whatever be the nature of the other ion of the electrolyte
  done clear
  B)
  in finite dilution, each ion makes definite contribution to equivalent conductance of an electrolyte depending on the nature of the other ion of the electrolyte.
  done clear
  C)
  infinite dilution, each ion makes definite contribution to conductance of an electrolyte whatever be the nature of the other ion of the electrolyte.
  done clear
  D)
  infinite dilution, each ion makes definite contribution to equivalent conductance of an electrolyte, whatever be the nature of the other ion of the electrolyte.
  done clear
  View Answer play_arrow

• question_answer61) Which one of the following is most reactive towards electrophilic attack?
  A)
                                                                    
  done clear
  B)
  
  done clear
  C)
                                                          
  done clear
  D)
          
  done clear
  View Answer play_arrow

• question_answer62) Volume occupied by one molecule of water (density \[=1\,g\,c{{m}^{-3}}\]) is
  A)
  \[9.0\times {{10}^{-}}^{23}c{{m}^{3}}\]                 
  done clear
  B)
  \[6.023\times {{10}^{-}}^{23}c{{m}^{3}}\]
  done clear
  C)
  \[3.0\times {{10}^{-}}^{23}c{{m}^{3}}\]                 
  done clear
  D)
  \[5.5\times {{10}^{-}}^{23}c{{m}^{3}}\]
  done clear
  View Answer play_arrow

• question_answer63) Which of the following complexes exhibits the highest paramagnetic behaviour? where gly = glycine, en = ethylenediamine and bpy = bipyridyl moities (At no : Ti = 22, V = 23, Fe = 26, Co = 27)
  A)
  \[{{[V{{(gly)}_{2}}{{(OH)}_{2}}{{(N{{H}_{3}})}_{2}}]}^{+}}\]
  done clear
  B)
  \[{{[Fe(en)(bpy){{(N{{H}_{3}})}_{2}}]}^{2+}}\]
  done clear
  C)
  \[{{[Co{{(OX)}_{2}}{{(OH)}_{2}}]}^{-}}\]
  done clear
  D)
  \[{{[Ti{{(N{{H}_{3}})}_{6}}]}^{3+}}\]
  done clear
  View Answer play_arrow

• question_answer64) If a gas expands at constant temperature, it indicates that
  A)
  kinetic energy-of molecules decreases
  done clear
  B)
  pressure of the gas increases
  done clear
  C)
  kinetic energy of molecules remains the same
  done clear
  D)
  number of the molecules of gas increases
  done clear
  View Answer play_arrow

• question_answer65) For the gas phase reaction, \[PC{{l}_{5}}_{(g)}PC{{l}_{3}}(g)+C{{l}_{2}}(g)\]which of the following conditions are correct?
  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_answer66) In a \[{{S}_{N}}2\] substitution reaction of the type \[R-Br+C{{l}^{-}}\xrightarrow[{}]{DNF}R-Cl+B{{r}^{-}},\]which one of the following has the highest relative rate?
  A)
  \[C{{H}_{3}}-C{{H}_{2}}-C{{H}_{2}}Br\]
  done clear
  B)
  \[C{{H}_{3}}-\underset{\begin{smallmatrix}  | \\  C{{H}_{3}} \end{smallmatrix}}{\mathop{CH}}\,-C{{H}_{2}}Br\]
  done clear
  C)
  \[C{{H}_{3}}-\underset{\begin{smallmatrix}  | \\  C{{H}_{3}} \end{smallmatrix}}{\overset{\begin{smallmatrix}  C{{H}_{3}} \\  | \end{smallmatrix}}{\mathop{C}}}\,-C{{H}_{2}}Br\]          
  done clear
  D)
  \[C{{H}_{3}}C{{H}_{2}}Br\]
  done clear
  View Answer play_arrow

• question_answer67) Number of moles of \[MnO_{4}^{-}\] required to oxidize one mole of ferrous oxalate completely in acidic medium will be
  A)
  0. 6 mole      
  done clear
  B)
         0.4 mole                              
  done clear
  C)
  7.5 moles            
  done clear
  D)
  0.2 mole
  done clear
  View Answer play_arrow

• question_answer68) If the concentration of \[O{{H}^{-}}\]ions in the reaction \[Fe{{(OH)}_{3}}(s)F{{e}^{3+}}(aq)+3O{{H}^{-}}(aq)\]   is decreased by \[\frac{1}{4}\] times, then equilibrium concentration of \[F{{e}^{3+}}\] will increase by
  A)
  8 times     
  done clear
  B)
         16 times                              
  done clear
  C)
  64 times
  done clear
  D)
  4 times
  done clear
  View Answer play_arrow

• question_answer69) The sequence of ionic mobility in aqueous solution is
  A)
  \[{{K}^{+}}>N{{a}^{+}}>R{{b}^{+}}>C{{s}^{+}}\]
  done clear
  B)
  \[C{{s}^{+}}>R{{b}^{+}}>{{K}^{+}}>N{{a}^{+}}\]
  done clear
  C)
  \[R{{b}^{+}}>{{K}^{+}}>C{{s}^{+}}>N{{a}^{+}}\]
  done clear
  D)
  \[N{{a}^{+}}>{{K}^{+}}>R{{b}^{+}}>C{{s}^{+}}\]
  done clear
  View Answer play_arrow

• question_answer70) The alkali metals form salt-like hydrides by the direct synthesis at elevated temperature. The thermal stability of these hydrides decreases in which of the following orders?
  A)
  CsH > RbH > KH > NaH > UH
  done clear
  B)
  KH > NaH > LiH > CsH > RbH
  done clear
  C)
  NaH > LiH > KH > RbH > CsH
  done clear
  D)
  LiH > NaH > KH > RbH > CsH
  done clear
  View Answer play_arrow

• question_answer71) Which one of the following arrangements does not give the correct picture of the trends indicated against it?
  A)
  \[{{F}_{2}}>C{{l}_{2}}>B{{r}_{2}}>{{I}_{2}}:\] Oxidizing power
  done clear
  B)
  \[{{F}_{2}}>C{{l}_{2}}>B{{r}_{2}}>{{I}_{2}}:\] Electron gain enthalpy
  done clear
  C)
  \[{{F}_{2}}>C{{l}_{2}}>B{{r}_{2}}>{{I}_{2}}:\] Bond dissociation energy           
  done clear
  D)
  \[{{F}_{2}}>C{{l}_{2}}>B{{r}_{2}}>{{I}_{2}}\]: Electronegativity
  done clear
  View Answer play_arrow

• question_answer72) Standard free energies of formation (in kJ/mol) at 298 K are -237.2, -394.4. and -8.2 for\[{{H}_{2}}O(l)C{{O}_{2}}(g)\] ate) and pentane  (g), respectively. The value of \[E_{cell}^{o}\]pentane-oxygen fuel cell is
  A)
  1.968 V   
  done clear
  B)
        2.0968 V                              
  done clear
  C)
  1.0968 V              
  done clear
  D)
  0.0968 V
  done clear
  View Answer play_arrow

• question_answer73) \[{{H}_{3}}C-\underset{\begin{smallmatrix}  | \\  C{{H}_{3}} \end{smallmatrix}}{\mathop{CH}}\,-CH=C{{H}_{2}}+HBr\to A\] A (Predominantly) is
  A)
  \[C{{H}_{3}}-\underset{\begin{smallmatrix}  | \\  C{{H}_{3}} \end{smallmatrix}}{\mathop{CH}}\,-C{{H}_{2}}-C{{H}_{2}}Br\]
  done clear
  B)
  \[C{{H}_{3}}-\underset{\begin{smallmatrix}  | \\  C{{H}_{3}} \end{smallmatrix}}{\overset{\begin{smallmatrix}  Br \\  | \end{smallmatrix}}{\mathop{C}}}\,-C{{H}_{2}}C{{H}_{3}}\]
  done clear
  C)
  \[C{{H}_{3}}-\underset{\begin{smallmatrix}  | \\  Br \end{smallmatrix}}{\mathop{CH}}\,-\underset{\begin{smallmatrix}  | \\  C{{H}_{3}} \end{smallmatrix}}{\mathop{CH}}\,-C{{H}_{3}}\]
  done clear
  D)
  \[C{{H}_{3}}-\underset{\begin{smallmatrix}  | \\  C{{H}_{3}} \end{smallmatrix}}{\mathop{CH}}\,-\underset{\begin{smallmatrix}  | \\  Br \end{smallmatrix}}{\mathop{CH}}\,-C{{H}_{3}}\]
  done clear
  View Answer play_arrow

• question_answer74) Base strength of (A)\[{{H}_{3}}C\overset{\Theta }{\mathop{C}}\,{{H}_{2}}\]                         (B)\[{{H}_{2}}C=\overset{\Theta }{\mathop{C}}\,H\]and (C) \[H-C\equiv \overset{\Theta }{\mathop{C}}\,\]is in the order of
  A)
  (2) > (1) > (3)  
  done clear
  B)
         (3) > (2) > (1)     
  done clear
  C)
  (1) > (3) > (2)     
  done clear
  D)
  (1) > (2) > (3)
  done clear
  View Answer play_arrow

• question_answer75) Which of the following statements is not correct?      
  A)
  The fraction of the total volume occupied by the atoms in a primitive cell is 0.48
  done clear
  B)
  Molecular solids are generally volatile
  done clear
  C)
  The number of carbon atoms in an unit cell of diamond is 4
  done clear
  D)
  The number of Bravais lattices in which a crystal can be categorized is 14
  done clear
  View Answer play_arrow

• question_answer76) If ?a? stands for the edge length of the cubic systems : simple cubic, body centred cubic and face centred cubic, then the ratio of radii of the spheres in these systems will be respectively,
  A)
  \[\frac{1}{2}a;\frac{\sqrt{3}}{4}a:\frac{1}{2\sqrt{2}}a\]  
  done clear
  B)
  \[\frac{1}{2}a;\sqrt{3}a:\frac{1}{\sqrt{2}}a\]       
  done clear
  C)
  \[\frac{1}{2}a:\frac{\sqrt{3}}{2}a:\frac{\sqrt{2}}{2}a\]    
  done clear
  D)
  \[1a:\sqrt{3}a:\sqrt{2}a\]
  done clear
  View Answer play_arrow

• question_answer77) The rate constants \[{{k}_{1}}\] and \[{{k}_{2}}\] for two different reactions are \[{{10}^{16}}.{{e}^{-2000/T}}\] and \[{{10}^{15}}.{{e}^{-1000/T}},\] respectively. The temperature at which \[{{k}_{1}}={{k}_{2}}\]is
  A)
  1000 K                  
  done clear
  B)
         \[\frac{2000}{2.303}K\]                 
  done clear
  C)
  2000 K                                  
  done clear
  D)
  \[\frac{1000}{2.303}K\]
  done clear
  View Answer play_arrow

• question_answer78) What volume of oxygen gas \[({{O}_{2}})\] measured at 0°C and 1 atm, is needed to bum completely 1 L of propane gas \[({{C}_{3}}{{H}_{8}})\] measured under the same conditions?
  A)
  7 L   
  done clear
  B)
                                         6 L                                          
  done clear
  C)
  5 L
  done clear
  D)
  10 L
  done clear
  View Answer play_arrow

• question_answer79) The correct order of increasing bond angles in the following triatomic species is
  A)
  \[NO_{2}^{-}<NO_{2}^{+}<N{{O}_{2}}\]              
  done clear
  B)
  \[NO_{2}^{-}<N{{O}_{2}}<NO_{2}^{+}\]              
  done clear
  C)
  \[NO_{2}^{+}<N{{O}_{2}}<NO_{2}^{-}\]              
  done clear
  D)
  \[NO_{2}^{+}<NO_{2}^{-}<N{{O}_{2}}\]
  done clear
  View Answer play_arrow

• question_answer80) How many stereoisomers does this molecule have?\[C{{H}_{3}}CH=CHC{{H}_{2}}\overset{*}{\mathop{C}}\,HBrC{{H}_{3}}\]
  A)
  4 
  done clear
  B)
                                         6                                             
  done clear
  C)
  8                             
  done clear
  D)
         2
  done clear
  View Answer play_arrow

• question_answer81) Equimolar solutions of the following were prepared in water separately. Which one of the solutions will record the highest pH?
  A)
  \[SrC{{l}_{2}}\] 
  done clear
  B)
         \[BaC{{l}_{2}}\]                
  done clear
  C)
  \[MgC{{l}_{2}}\]                              
  done clear
  D)
  \[CaC{{l}_{2}}\]
  done clear
  View Answer play_arrow

• question_answer82) Four diatomic species are listed below in different sequences. Which of these presents the correct order of their increasing bond order?
  A)
  \[O_{2}^{-}<NO<C_{2}^{2-}<He_{2}^{+}\]
  done clear
  B)
  \[NO<C_{2}^{2-}<O_{2}^{-}He_{2}^{+}\]
  done clear
  C)
  \[C_{2}^{2-}<He_{2}^{+}<NO<O_{2}^{-}\]
  done clear
  D)
  \[He_{2}^{+}<O_{2}^{-}<NO<C_{2}^{2-}\]
  done clear
  View Answer play_arrow

• question_answer83) Percentage of free space in a body centred  cubic unit cell is
  A)
  30%    
  done clear
  B)
                         32%                                       
  done clear
  C)
  34%                                       
  done clear
  D)
  28%
  done clear
  View Answer play_arrow

• question_answer84) With which one of the following elements silicon should be doped so as to give p-type of semiconductor?
  A)
  Germanium     
  done clear
  B)
         Arsenic
  done clear
  C)
  Selenium            
  done clear
  D)
  Boron
  done clear
  View Answer play_arrow

• question_answer85) An organic compound contains carbon hydrogen and oxygen. Its elemental analysis gave C, 38.71% and H, 9.67%. The empirical formula of the compound would be
  A)
  \[C{{H}_{3}}O\]
  done clear
  B)
                         \[C{{H}_{2}}O\]                
  done clear
  C)
  \[CHO\]               
  done clear
  D)
         \[C{{H}_{4}}O\]
  done clear
  View Answer play_arrow

• question_answer86) The measurement of the electron position is associated with an uncertainty in momentum, which is equal to \[1\times {{10}^{-18}}g\,cm\,{{s}^{-1}}.\]The uncertainty in electron velocity is, (mass of an electron is \[9\times {{10}^{-28}}g\])
  A)
  \[1\times {{10}^{9}}cm\,{{s}^{-1}}\]                       
  done clear
  B)
  \[1\times {{10}^{6}}cm\,{{s}^{-1}}\]       
  done clear
  C)
         \[1\times {{10}^{5}}cm\,{{s}^{-1}}\]                       
  done clear
  D)
  \[1\times {{10}^{11}}cm\,{{s}^{-1}}\]
  done clear
  View Answer play_arrow

• question_answer87) How many moles of lead (II) chloride will be formed from a reaction between 6.5 g of PbO and 3.2g of HCl?
  A)
  0.044                                    
  done clear
  B)
  0.333                                    
  done clear
  C)
  0.011                                    
  done clear
  D)
  0.029
  done clear
  View Answer play_arrow

• question_answer88) In a reaction of aniline a coloured product C was obtained. The structure of C would be
  A)
  
  done clear
  B)
  
  done clear
  C)
  
  done clear
  D)
  
  done clear
  View Answer play_arrow

• question_answer89) A strong; base can abstract an \[\text{-}\]hydrogen from
  A)
  alkene   
  done clear
  B)
                                         amine                  
  done clear
  C)
  ketone                
  done clear
  D)
  alkane
  done clear
  View Answer play_arrow

• question_answer90) The stability of carbanions in the following (A)\[RC\equiv \overset{\Theta }{\mathop{C}}\,\]                            (B) (C)\[{{R}_{2}}C\equiv \overset{\Theta }{\mathop{C}}\,H\]                           (D)\[{{R}_{3}}C-\overset{\Theta }{\mathop{C}}\,{{H}_{2}}\] is in the order of
  A)
  (1) > (2) > (3) > (4)
  done clear
  B)
  (2) > (3) > (4) > (1)
  done clear
  C)
  (4) > (2) > (3) > (1)
  done clear
  D)
  (1) > (3) > (2) > (4)
  done clear
  View Answer play_arrow

• question_answer91) Bond dissociation enthalpy of \[{{H}_{2}},C{{l}_{2}}\] and \[HCl\] are 434, 242 and \[431\,\,kJ\,mo{{l}^{-1}}\] respectively. Enthalpy of formation of HCl is
  A)
  \[93\,kJ\,mo{{l}^{-1}}\]                
  done clear
  B)
  \[-245\,kJ\,mo{{l}^{-1}}\]                            
  done clear
  C)
  \[-93\,kJ\,mo{{l}^{-1}}\]                              
  done clear
  D)
  \[245\,kJ\,mo{{l}^{-1}}\]
  done clear
  View Answer play_arrow

• question_answer92) The dissociation equilibrium of a gas \[A{{B}_{2}}\] can be represented as \[2A{{B}_{2}}(g)2AB(g)+{{B}_{2}}(g)\] The degree of dissociation is 'x' and is small compared to 1. The expression relating the degree of dissociation (x) with equilibrium constant \[{{K}_{p}}\] and total pressure p is
  A)
  \[(2{{K}_{p}}/p)\]
  done clear
  B)
                         \[{{(2{{K}_{p}}/p)}^{1/3}}\]
  done clear
  C)
  \[{{(2{{K}_{p}}/p)}^{1/2}}\]                        
  done clear
  D)
  \[({{K}_{p}}/p)\]
  done clear
  View Answer play_arrow

• question_answer93) Which one of the following is an amine hormone?
  A)
  Thyroxine       
  done clear
  B)
         Oxypurin                            
  done clear
  C)
  Insulin                  
  done clear
  D)
         Progesterone
  done clear
  View Answer play_arrow

• question_answer94) Which one of the following statements is not true?
  A)
  In vulcanisation, the formation of sulphur bridges between different chains make rubber harder and stronger
  done clear
  B)
  Natural rubber has the traras-configuration at every double bond
  done clear
  C)
  Buna-S is a copolymer of butadiene and styrene
  done clear
  D)
  Natural rubber is a 1, 4-polymer of isoprene
  done clear
  View Answer play_arrow

• question_answer95) In the hydrocarbon \[\underset{6}{\mathop{C{{H}_{3}}}}\,-\underset{5}{\mathop{CH}}\,=\underset{4}{\mathop{CH}}\,-\underset{3}{\mathop{C{{H}_{2}}}}\,-\underset{2}{\mathop{C}}\,\equiv \underset{1}{\mathop{CH}}\,\] The state of hybridisation of carbons 1, 3 and 5 are in the following sequence
  A)
  \[~s{{p}^{2}},sp,\text{ }s{{p}^{3}}\]   
  done clear
  B)
         \[sp,\text{ }s{{p}^{3}},\text{ }s{{p}^{2}}\]            
  done clear
  C)
         \[sp,\text{ }s{{p}^{2}},\text{ }s{{p}^{3}}\]       
  done clear
  D)
         \[s{{p}^{3}},s{{p}^{2}},\text{ }sp\]
  done clear
  View Answer play_arrow

• question_answer96) The values of \[{{K}_{{{p}_{1}}}}\] and \[{{K}_{{{p}_{2}}}}\]for the reactions \[XY+Z\]                                                               ...(i) and          \[A2B\]                                               ..(ii) are in ratio of 9 : 1. If degree of dissociation of X and A be equal, then total pressure at equilibrium (i) and (ii) are in the ratio
  A)
  3 : 1
  done clear
  B)
                                         1 : 9                       
  done clear
  C)
         36 : 1                     
  done clear
  D)
         1 : 1
  done clear
  View Answer play_arrow

• question_answer97) In DNA, the complimentary bases are
  A)
  Adenine and thymine; guanine and cytosine
  done clear
  B)
  Adenine and thymine; guanine and uracil
  done clear
  C)
  Adenine and guanine, thymine and cytosine
  done clear
  D)
  Uracil and adenine; cytosine and guanine
  done clear
  View Answer play_arrow

• question_answer98) The bromination of acetone that occurs in acid solution is represented by this equation. \[C{{H}_{3}}COC{{H}_{3}}(aq)+B{{r}_{2}}(aq)\xrightarrow[{}]{{}}\] \[C{{H}_{3}}COC{{H}_{2}}Br(aq)+{{H}^{+}}(aq)+B{{r}^{-}}(aq)\] These kinetic data were obtained for given reaction concentrations. Initial concentrations, M \[[C{{H}_{3}}COC{{H}_{3}}]\]      \[[B{{r}_{2}}]\]                  \[[{{H}^{+}}]\] 0.30                        0.05       0.05 0.30                        0.10       0.05 0.30                        0.10       0.10 0.40                        0.05       0.20 Initial rate, disappearance of \[B{{r}_{2}},M{{s}^{-1}}\] \[5.7\times {{10}^{-5}}\] \[5.7\times {{10}^{-5}}\] \[1.2\times {{10}^{-4}}\] \[3.1\times {{10}^{-4}}\] Based on these data, the rate equation is
  A)
  Rate \[=k[C{{H}_{3}}COC{{H}_{3}}][{{H}^{+}}]\]
  done clear
  B)
  Rate\[=k[CH=COC{{H}_{3}}][B{{r}_{2}}]\]
  done clear
  C)
  Rate \[=k[C{{H}_{3}}COC{{H}_{3}}][B{{r}_{2}}]{{[{{H}^{+}}]}^{2}}\]
  done clear
  D)
  Rate \[=k[C{{H}_{3}}COC{{H}_{3}}][B{{r}_{2}}]{{[{{H}^{+}}]}^{2}}\]
  done clear
  View Answer play_arrow

• question_answer99) The value of equilibrium constant of the reaction \[HI(g)\frac{1}{2}{{H}_{2}}(g)+\frac{1}{2}{{I}_{2}}\]is 8.0 The equilibrium constant of the reaction \[{{H}_{2}}(g)+{{I}_{2}}(g)2HI(g)\]will be
  A)
  \[\frac{1}{16}\]                                
  done clear
  B)
  \[\frac{1}{64}\]                
  done clear
  C)
         16                          
  done clear
  D)
         \[\frac{1}{8}\]
  done clear
  View Answer play_arrow

• question_answer100) In which of the following coordination entities the magnitude of \[{{\Delta }_{o}}\](CCFSE in octahedral field) will be maximum? (Atomic number Co = 27)
  A)
  \[{{[Co{{({{H}_{2}}O)}_{6}}]}^{3+}}\]      
  done clear
  B)
  \[{{[Co{{(N{{H}_{3}})}_{6}}]}^{3+}}\]
  done clear
  C)
  \[{{[Co{{(CN)}_{6}}]}^{3-}}\]      
  done clear
  D)
  \[{{[Co{{({{C}_{2}}{{O}_{4}})}_{3}}]}^{3-}}\]
  done clear
  View Answer play_arrow

• question_answer101) Keeping in view the 'fluid mosaic model' for the structure of cell membrane, which one 'of the following statements is correct with respect to the movement of lipids and proteins from one lipid monolayer to the other (described as flip-flop movement)?
  A)
  Both lipids and proteins can flip-flop
  done clear
  B)
  While lipids can rarely flip-flop, proteins cannot
  done clear
  C)
  While proteins can flip-flop, lipids cannot
  done clear
  D)
  Neither lipids, nor proteins can flip-flop
  done clear
  View Answer play_arrow

• question_answer102) Which one of the following pairs of plant structures has haploid number of chromosomes?
  A)
  Megaspore mother cell and antipodal cells
  done clear
  B)
  Egg cell and antipodal cells
  done clear
  C)
  Nucellus and antipodal cells
  done clear
  D)
  Egg nucleus and secondary nucleus
  done clear
  View Answer play_arrow

• question_answer103) The \[{{C}_{4}}\]-plants are photosynthetically more efficient than \[{{C}_{3}}\]-plants because
  A)
  the \[C{{O}_{2}}\]compensation point is more
  done clear
  B)
  \[C{{O}_{2}}\] generated during photorespiration is trapped and recycled through- PEP carboxylase
  done clear
  C)
  the \[C{{O}_{2}}\]efflux is not prevented
  done clear
  D)
  they have more chloroplasts
  done clear
  View Answer play_arrow

• question_answer104) In human adult females, oxytocin
  A)
  is secreted by anterior pituitary
  done clear
  B)
  stimulates growth of mammary glands
  done clear
  C)
  stimulates pituitary to secrete vasopressin
  done clear
  D)
  causes strong uterine contractions during parturition                
  done clear
  View Answer play_arrow

• question_answer105) Gel electrophoresis is used for
  A)
  cutting of DNA into fragments
  done clear
  B)
  separation of DNA fragments according to their size               
  done clear
  C)
  construction of recombinant DNA by joining with cloning vectors
  done clear
  D)
  isolation of DNA molecule
  done clear
  View Answer play_arrow

• question_answer106) Polysome is formed by
  A)
  several ribosomes attached to a single mRNA
  done clear
  B)
  done clear
  C)
  a ribosome with several subunits
  done clear
  D)
  ribosomes attached to each other in a linear arrangement
  done clear
  View Answer play_arrow

• question_answer107) Given below are four methods (A-D) and their modes of action (1-4) in achieving contraception. Select their correct matching from the four options that follow

  	Method		Mode of action
  A.	The pill	1.	Prevents sperms reaching
  B.	Condom	2.	Prevents implantation
  C.	Vasectomy	3.	Prevents ovulation
  D.	Copper-T	4.	Semen contains no sperms

   
  A)
  A-3          B-1        C-4         D-2
  done clear
  B)
  A-4          B-1        C-2         D-3
  done clear
  C)
  A-3          B-4        C-1         D-2
  done clear
  D)
  A-2          B-3        C-1         D-4
  done clear
  View Answer play_arrow

• question_answer108) What is vital capacity of our lungs?
  A)
  Inspiratory reserve volume plus tidal volume
  done clear
  B)
  Total lung capacity minus expiratory reserve volume
  done clear
  C)
  Inspiratory reserve volume plus expiratory reserve volume
  done clear
  D)
  Total lung capacity minus residual volume
  done clear
  View Answer play_arrow

• question_answer109) In which one of the following, the male and female gametophytes don't have free-living independent existence?
  A)
  Pteris            
  done clear
  B)
         Funaria
  done clear
  C)
  Polytrichum      
  done clear
  D)
  Cedrus
  done clear
  View Answer play_arrow

• question_answer110) A transgenic food crop, which may help in solving the problem of nightblindness in developing countries is
  A)
  Flovr savr tomatoes       
  done clear
  B)
  Starlink maize
  done clear
  C)
  Btsoybean         
  done clear
  D)
         Golden rice
  done clear
  View Answer play_arrow

• question_answer111) A lake near a village suffered heavy mortality of fishes within a few days. Consider the following reasons for this (A) Lots of urea and phosphate fertilizer were used in the crops in the vicinity. (B) The area was sprayed with DDT by an aircraft. (C) The lake water turned green and stinky. (D) Phytoplankton populations in the lake declined initially thereby greatly reducing    photosynthesis. Which two of above were the main causes of fish mortality in the lake?
  A)
  2, 3   
  done clear
  B)
                                         3, 4
  done clear
  C)
  1, 3                                        
  done clear
  D)
  1, 2   
  done clear
  View Answer play_arrow

• question_answer112) Given below is a diagrammatic cross section of a single loop of human cochlea. Which one of the following options correctly represents the names of three different parts?
  A)
  B Tectorial membrane C Perilymph D Secretory cells
  done clear
  B)
  C Endolymph D Sensory hair cells A Serum
  done clear
  C)
  D Sensory hair cells A Endolymph B Tectorial membrane
  done clear
  D)
  A Perilymph B Tectorial membrane C Endolymph
  done clear
  View Answer play_arrow

• question_answer113) Senescence as an active developmental cellular process in the growth and functioning of a flowering plant, is indicated in
  A)
  vessels and tracheid differentiation
  done clear
  B)
  leaf abscission
  done clear
  C)
  annual plants    
  done clear
  D)
  floral parts
  done clear
  View Answer play_arrow

• question_answer114) Vascular tissues in flowering plants develop from
  A)
  phellogen           
  done clear
  B)
  plerome
  done clear
  C)
  periblem             
  done clear
  D)
  dermatogen
  done clear
  View Answer play_arrow

• question_answer115) Nitrogen-fixation in root nodules of Alnus is brought about by
  A)
  Bradyrhizobium               
  done clear
  B)
  Clostridium
  done clear
  C)
  Frankia                                
  done clear
  D)
  Azorhizobium
  done clear
  View Answer play_arrow

• question_answer116) What will happen if the secretion of parietal cells of gastric glands is blocked with an inhibitor?
  A)
  Gastric juice will be deficient in chymosin
  done clear
  B)
  Gastric juice will be deficient in pepsinogen
  done clear
  C)
  In the absence of HCl secretion, inactive pepsinogen is not converted into the active enzyme pepsin
  done clear
  D)
  Enterokinase will not be released from the duodenal mucosa and so trypsinogen is no converted to trypsin
  done clear
  View Answer play_arrow

• question_answer117) Electrons from excited chlorophyll molecule photosystem-II are accepted first by
  A)
  cytochrome-b                  
  done clear
  B)
  cytochrome-f   
  done clear
  C)
  quinone              
  done clear
  D)
  ferredoxin
  done clear
  View Answer play_arrow

• question_answer118) Trichoderma harzianum has proved a useful micro-organism for
  A)
  bioremediation of contaminated soils
  done clear
  B)
  reclamation of wastelands
  done clear
  C)
  gene transfer in higher plants
  done clear
  D)
  biological control of soil-borne plan pathogens
  done clear
  View Answer play_arrow

• question_answer119) Which type of white blood cells are concern with the release of histamine and the nautili anticoagulant heparin?
  A)
  Neutrophils       
  done clear
  B)
  Basophils                            
  done clear
  C)
  Eosinophils        
  done clear
  D)
  Monqcytes
  done clear
  View Answer play_arrow

• question_answer120) Which one of the following in birds, indica their reptilian ancestry?        
  A)
  Scales on their hind limbs
  done clear
  B)
  Pour chambered heart
  done clear
  C)
  Two special chambers crop and gizzard in their digestive tract
  done clear
  D)
  Eggs with a calcareous shell
  done clear
  View Answer play_arrow

• question_answer121) Endosperm is consumed by developing embryo in the seed of
  A)
  coconut         
  done clear
  B)
         castor                   
  done clear
  C)
  pea    
  done clear
  D)
  maize
  done clear
  View Answer play_arrow

• question_answer122) In humans, at the end of the first meiotic division, the male germ cells differentiate into the
  A)
  primary spermatocytes
  done clear
  B)
  secondary spermatocytes
  done clear
  C)
  spermatids
  done clear
  D)
  spermatogonia
  done clear
  View Answer play_arrow

• question_answer123) In the DNA molecule
  A)
  the total amount of purine nucleotides and pyrimidine nucleotides is not always equal
  done clear
  B)
  there are two strands, which run parallel in the \[5'\to 3'\] direction
  done clear
  C)
  the proportion of adenine in relation to thymine varies with the organism
  done clear
  D)
  there are two strands, which run anti parallel-one in \[5'\to 3'\] direction and other in \[5'\to 3'\]
  done clear
  View Answer play_arrow

• question_answer124) Consider the following four measures (A-D) that could be taken to successfully grow chick pea in an area where bacterial blight disease is common
  A)
  (A) spray with Bordeaux mixture (B) control of the insect vector of the disease pathogen (C) use of only disease-free seeds (D) use of varieties resistant to the disease Which two of the above measures can control the disease? B and C       
  done clear
  B)
                        A and B                
  done clear
  C)
  C and D                                
  done clear
  D)
  A and D
  done clear
  View Answer play_arrow

• question_answer125) The rupture and fractionation do not usually occur in the water column in vessel/tracheids during the ascent of sap because of
  A)
  lignified thick walls
  done clear
  B)
  cohesion and adhesion
  done clear
  C)
  weak gravitational pull
  done clear
  D)
  transpiration pull
  done clear
  View Answer play_arrow

• question_answer126) The blood calcium level is lowered by the deficiency of
  A)
  parathormone
  done clear
  B)
  thyroxine                           
  done clear
  C)
  calcitonin            
  done clear
  D)
         Both (a) and (c)
  done clear
  View Answer play_arrow

• question_answer127) About 70% of total global carbon is found in
  A)
  grasslands    
  done clear
  B)
         agro-ecosystems
  done clear
  C)
  oceans          
  done clear
  D)
  forests                 
  done clear
  View Answer play_arrow

• question_answer128) Which one of the following is heterosporous?
  A)
  Dryopteris          
  done clear
  B)
  Salvinia                
  done clear
  C)
  Adianrum           
  done clear
  D)
  Equisetum
  done clear
  View Answer play_arrow

• question_answer129) Dry indehiscent single-seeded fruit formed from bicarpellary syncarpous inferior ovary is
  A)
  caryopsis            
  done clear
  B)
  cypsela
  done clear
  C)
  berry                                    
  done clear
  D)
  cremocarp                         
  done clear
  View Answer play_arrow

• question_answer130) Which extra embryonic membrane in humans prevents desiccation of the embryo inside the uterus?    
  A)
  Chorion 
  done clear
  B)
                                                         Allantois
  done clear
  C)
  Yolk sac                               
  done clear
  D)
  Amnion                               
  done clear
  View Answer play_arrow

• question_answer131) The fleshy receptacle of syconous of fig encloses a number of
  A)
  achenes
  done clear
  B)
                         samaras
  done clear
  C)
  berries                                 
  done clear
  D)
  mericarps
  done clear
  View Answer play_arrow

• question_answer132) Which one of the following is linked to the discovery of Bordeaux mixture as a popular fungicide?
  A)
  Bacterial leaf blight of rice
  done clear
  B)
  Downy mildew of grapes
  done clear
  C)
  Loose smut of wheat
  done clear
  D)
  Black rust of wheat
  done clear
  View Answer play_arrow

• question_answer133) Unisexuality of flowers prevents
  A)
  autogamy, but not geitonogamy
  done clear
  B)
  Both geitonogamy andxenogamy
  done clear
  C)
  geitonogamy, but not xenogamy
  done clear
  D)
  autogamy and geitonogamy
  done clear
  View Answer play_arrow

• question_answer134) The length of different inte modes in a culm of sugarcane is variable because of
  A)
  shoot apical meristem
  done clear
  B)
  poition of axillary buds
  done clear
  C)
  size of leaf lamina at the node below each Internode
  done clear
  D)
  intercalary meristem
  done clear
  View Answer play_arrow

• question_answer135) Which one of the following is the correct difference between rod cells and cone cells of our retina?
  A)
                  Features Visual acuity                    Rod Cells             High                       Cone Cells         Low                       
  done clear
  B)
                  Features Visual pigment               Rod Cells             Iodopsin               Cone Cells         Rhodopsin    contained        
  done clear
  C)
                  Features Overall function             Rod Cells             Vision poor light Cone Cells         Colour vision and detailed vision in bright light
  done clear
  D)
  Features Distribution     Rod Cells             More concentrated in    Cone Cells          Evenly distributed all over                                                                                                centre of retian                                                retina
  done clear
  View Answer play_arrow

• question_answer136) In leaves of \[{{\text{C}}_{\text{4}}}\text{-}\]plants malic acid synthesis during \[\text{C}{{\text{O}}_{\text{2}}}\text{-}\]fixation occurs in
  A)
  epidermal cells  
  done clear
  B)
  mesophyll cells
  done clear
  C)
  bundle sheath   
  done clear
  D)
         guard cells
  done clear
  View Answer play_arrow

• question_answer137) Which one of the following pairs of codons is correctly matcher with their function or the signal for the particular amino acid?
  A)
  GUU, GCU ? Alanine
  done clear
  B)
  UAG, UGA?Stop
  done clear
  C)
  AUG, ACG ? Start/methionine
  done clear
  D)
  UUA, UCA?Leucine
  done clear
  View Answer play_arrow

• question_answer138) Cellulose is the major component of cell walls of
  A)
  Pythium              
  done clear
  B)
         Xanthomonas                   
  done clear
  C)
  Pseudomonas                  
  done clear
  D)
  Saccharomyces
  done clear
  View Answer play_arrow

• question_answer139) The slow rate of decomposition of fallen logs in nature is due to their
  A)
  low moisture content
  done clear
  B)
  poor nitrogen content
  done clear
  C)
  anaerobic environment around them
  done clear
  D)
  low cellulose content
  done clear
  View Answer play_arrow

• question_answer140) Carbohydrates are commonly found as starch in plant storage organs. Which of the following five properties of starch (A-E) make it useful as a storage material? (A) Easily translocated (B) Chemically non-reactive (C) Easily digested by animals (D) Osmotic ally inactive (E) Synthesized during photosynthesis The useful properties are
  A)
  (B) and (C)         
  done clear
  B)
  (B) and (D)                         
  done clear
  C)
  (A), (C) and (E)                 
  done clear
  D)
  (A) and (E)
  done clear
  View Answer play_arrow

• question_answer141) Which one of the following pairs of organs includes only the endocrine glands?
  A)
  Parathyroid and adrenal
  done clear
  B)
  Pancreas and parathyroid
  done clear
  C)
  Thymus and testes
  done clear
  D)
  Adrenal and ovary
  done clear
  View Answer play_arrow

• question_answer142) Match the disease in Column-I with the appropriate items (pathogen/ prevention/treatment) in Column-II

  	Column-I		Column-II
  A.	Amoebiasis	1.	Treponema pallidum
  B.	Diphtheria	2.	Use only sterilized food and water
  C.	Cholera	3.	DPT vaccine
  D.	Syphilis	4.	Use oral rehydration therapy

   
  A)
  A-1              B-2              C-3              D-4
  done clear
  B)
  A-2              B-4              C-1              D-3
  done clear
  C)
  A-2              B-1              C-3              D-4
  done clear
  D)
  A-2              B-3              C-4              D-1
  done clear
  View Answer play_arrow

• question_answer143) Replum is present in the ovary of flower of
  A)
  lemon        
  done clear
  B)
                        mustard                                              
  done clear
  C)
  sunflower          
  done clear
  D)
  pea
  done clear
  View Answer play_arrow

• question_answer144) Which one of the following is the correct matching of the site of action on the given substrate, the enzyme acting upon it and the end product?
  A)
  Duodenum:\[\text{Triglycerides}\xrightarrow[{}]{\text{Trypsin}}\] Monogylcerides
  done clear
  B)
  Small intestine: Starch \[\alpha \xrightarrow[{}]{\text{Amylase}}\]Disaccharide (maltose)
  done clear
  C)
  Small intestine: Proteins \[\xrightarrow[{}]{Pep\sin }\] Ammo acids
  done clear
  D)
  Stomach: Fats\[\xrightarrow[{}]{Lipase}\] Micelles
  done clear
  View Answer play_arrow

• question_answer145)  Modem   detergents   contain   enzyme preparations of
  A)
  acidophiles      
  done clear
  B)
         alkaliphiles                         
  done clear
  C)
  thermoacidophiles         
  done clear
  D)
  thermophiles
  done clear
  View Answer play_arrow

• question_answer146) The haemoglobin of a human foetus
  A)
  has a lower affinity for oxygen than that of the adult
  done clear
  B)
  its affinity for oxygen is the same as that of an adult
  done clear
  C)
  has only 2 protein subunits instead of 4
  done clear
  D)
  has a higher affinity for oxygen than that of an adult
  done clear
  View Answer play_arrow

• question_answer147) Which one of the following scientist's name is correctly matched with the theory put forth by him?
  A)
  Weismann                          ? Theory of continuity of germplasm
  done clear
  B)
  Pasteur                ? Inheritance of acquired characters
  done clear
  C)
  de Vries               ? Natural selection
  done clear
  D)
  Mendel                ? Theory of pangenesis
  done clear
  View Answer play_arrow

• question_answer148) The most active phagocytic white blood cells are
  A)
  neutrophils and eosinophils
  done clear
  B)
  lymphocytes and macrophages
  done clear
  C)
  eosinophils and lymphocytes
  done clear
  D)
  neutrophils and monocytes
  done clear
  View Answer play_arrow

• question_answer149) According to Central Pollution Control Board (CPCB), which paniculate size in diameter (in micrometres) of the air pollutants is responsible for greatest harm to human health?
  A)
  2.5 or less      
  done clear
  B)
        1.5 or less                           
  done clear
  C)
  1.0 or less           
  done clear
  D)
  5.2 or 2.5
  done clear
  View Answer play_arrow

• question_answer150) Which one of the following is the correct statement regarding the particular psychotropic drug specified?
  A)
  Hashish causes alter thought perceptions and hallucinations
  done clear
  B)
  Opium stimulates nervous system and causes hallucinations
  done clear
  C)
  Morphine leads to delusions and disturbed emotions
  done clear
  D)
  Barbiturates   cause   relaxation   and temporary euphoria
  done clear
  View Answer play_arrow

• question_answer151) The two subunits of ribosome remain united at a critical ion level of
  A)
  copper                 
  done clear
  B)
  manganese
  done clear
  C)
  magnesium                       
  done clear
  D)
  calcium
  done clear
  View Answer play_arrow

• question_answer152) During the propagation of a nerve impulse, the action potential results from the movement of
  A)
  \[{{K}^{+}}\]ions from extracellular fluid to intracellular fluid             
  done clear
  B)
  \[N{{a}^{+}}\]ions from intracellular fluid to extracellular fluid
  done clear
  C)
  \[{{K}^{+}}\]ions from intracellular fluid to extracellular fluid
  done clear
  D)
  \[N{{a}^{+}}\] ions from extracellular fluid to intracellular fluid
  done clear
  View Answer play_arrow

• question_answer153) Bacterial leaf blight of rice is caused by a species of
  A)
  Xanthomonas   
  done clear
  B)
  Pseudomonas  
  done clear
  C)
  Altemaria                           
  done clear
  D)
  Erwima
  done clear
  View Answer play_arrow

• question_answer154) Darwin's finches are an excellent example of
  A)
  adaptive radiation
  done clear
  B)
  seasonal migration
  done clear
  C)
  brood parasitism
  done clear
  D)
  connecting links
  done clear
  View Answer play_arrow

• question_answer155) Earthworms have no skeleton but during burrowing, the anterior end becomes turgid and acts as a hydraulic skeleton. It is due to
  A)
  coelomic fluid   
  done clear
  B)
         blood                   
  done clear
  C)
  gut peristalsis   
  done clear
  D)
  setae
  done clear
  View Answer play_arrow

• question_answer156) Which one of the following pair of nitrogenous bases of nucleic acids, is wrongly matched with the category mentioned against it?
  A)
  Thymine, Uracil                 ? Pyrimidines
  done clear
  B)
  Uracil, Cytosine                 ? Pyrimidines
  done clear
  C)
  Guanine, Adenine           ? Purines
  done clear
  D)
  Adenine, Thymine           ? Purines
  done clear
  View Answer play_arrow

• question_answer157) Main objective of production/use of herbicide resistant GM crops is to
  A)
  eliminate weeds from the field without the use of manual labour
  done clear
  B)
  eliminate weeds from the field without the use of herbicides
  done clear
  C)
  encourage eco-friendly herbicides
  done clear
  D)
  reduce herbicide accumulation in food particles for health safety
  done clear
  View Answer play_arrow

• question_answer158) The table below gives the populations (in thousands) of ten species (A-J) in four areas (a-d) consisting of the number of habitats given within brackets against each. Study the table and answer the question which follows:

  Area and number of habitats	Species and their populations (in thousands) in the areas
  	A	B	C	D	E	F	G	H	I	J
  a (11)	23	1.2	0.52	6.0	-	3.1	1.1	9.0	-	10.3
  b (11)	10.2	-	0.62	-	1.5	3.0	-	8.2	1.1	11.2
  c (13)	11.3	0.9	0.48	2.4	1.4	4.2	0.8	8.4	2.2	4.1
  d (12)	3.2	10.2	11.1	4.8	0.4	3.3	0.8	7.3	11.3	2.1

  Which area out of a to d shows maximum species diversity?
  A)
  b     
  done clear
  B)
                                         c
  done clear
  C)
  d                                            
  done clear
  D)
  a
  done clear
  View Answer play_arrow

• question_answer159) To which type of barriers under innate immunity, do the saliva in the mouth and the tears from the eyes, belong?
  A)
  Cytokine barriers
  done clear
  B)
  Cellular barriers
  done clear
  C)
  Physiological barriers
  done clear
  D)
  Physical barriers
  done clear
  View Answer play_arrow

• question_answer160) Cornea transplant in humans is almost never rejected. This is because
  A)
  its cells are least penetrable by bacteria
  done clear
  B)
  it has no blood supply
  done clear
  C)
  it is composed of enucleated cells
  done clear
  D)
  it is a non-living layer
  done clear
  View Answer play_arrow

• question_answer161) The energy-releasing process in which the substrate is oxidized without an external electron acceptor is called
  A)
  fermentation    
  done clear
  B)
  photorespiration
  done clear
  C)
  aerobic respiration
  done clear
  D)
  glycolysis
  done clear
  View Answer play_arrow

• question_answer162) Select one of the following pairs of important features distinguishing Gnetum from Cyccu and Pinus and showing affinities with angiosperms
  A)
  absence of resin duct and leaf venation
  done clear
  B)
  presence of vessel elements and absence of archegonia
  done clear
  C)
  perianth and two integuments
  done clear
  D)
  embryo development and apical meristem
  done clear
  View Answer play_arrow

• question_answer163) Thorn of Bougainvillea and tendril of Cucurbita are examples of
  A)
  analogous organs
  done clear
  B)
  homologous organs
  done clear
  C)
  vestigial organs
  done clear
  D)
  retrogressive evolution
  done clear
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• question_answer164) What is true about the isolated small tribal populations?
  A)
  There is a decline in population as boys marry girls only from their own tribe
  done clear
  B)
  Hereditary diseases like colour blindness do not spread in the isolated population
  done clear
  C)
  Wrestlers who develop strong body muscles in their life time pass this character on to their progeny
  done clear
  D)
  There is no change in1 population size as they have a large gene pool
  done clear
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• question_answer165) Human insulin is being commercially produced from a transgenic species of
  A)
  Escherichia      
  done clear
  B)
         Mycobacterium
  done clear
  C)
  Rhizobium       
  done clear
  D)
         Saccharomyces
  done clear
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• question_answer166) In the light of recent classification of living organisms into three domains of life (bacteria, archaea and eukarya), which one, of the following statement is true about archaea?
  A)
  Archaea resemble eukarya in all respects
  done clear
  B)
  Archaea have some novel features that are absent in other prokaryotes and eukaryotes
  done clear
  C)
  Archaea completely differ from both prokaryotes and eukaryotes
  done clear
  D)
  Archaea   completely   differ   from prokaryotes
  done clear
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• question_answer167) Thermococcus,      Methanococcus      and Methanobacterium examplify
  A)
  archaebacteria that  contain  protein homologous to eukaryotic core histones
  done clear
  B)
  archaebacteria that lack any histones resembling those found in eukaryotes but whose DNA is negatively supercoiled
  done clear
  C)
  bacteria whose DNA is relaxed or positively supercoiled but which have a cytoskeleton as well as mitochondria
  done clear
  D)
  bacteria that contain a cytoskeleton and ribosomes
  done clear
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• question_answer168) A competitive inhibitor of succinic dehydrogenase is
  A)
  malonate  
  done clear
  B)
        oxaloacetate
  done clear
  C)
  \[\text{-}\]ketoglutarate    
  done clear
  D)
  malate
  done clear
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• question_answer169) Cry-I endotoxins obtained from Bacillus thuringierisis are effective against
  A)
  mosquitoes      
  done clear
  B)
  flies
  done clear
  C)
  nematodes        
  done clear
  D)
  boll worms
  done clear
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• question_answer170) Vacuole in a plant cell
  A)
  is membrane-bound and contains storage proteins and lipids
  done clear
  B)
  is membrane-bound and contains water and excretory substances
  done clear
  C)
  lacks membrane and contains air
  done clear
  D)
  lacks membrane and contains water and excretory substances
  done clear
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• question_answer171) Which one of the following is not observed in biodiversity hot spots?
  A)
  Endemism
  done clear
  B)
  Accelerated species loss
  done clear
  C)
  Lesser inter specific competition
  done clear
  D)
  Species richness
  done clear
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• question_answer172) Consider the statements given below regarding contraception and answer as directed thereafter
  A)
  (A) Medical Termination of Pregnancy (MTP) during first trimester is generally safe (B) Generally chances of conception are nil until mother breast-feeds the infant upto two year (C) Intrauterine devices like copper-T are effective contraceptives (D) Contraception pills may be taken upto one week after coitus to prevent conception. Which two of the above statements are correct? B, C                                       
  done clear
  B)
  C, D                                       
  done clear
  C)
  A, C                                       
  done clear
  D)
  A, B
  done clear
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• question_answer173) Which one of the following proved effective for biological control of nematodal diseases in plants?
  A)
  Pisolithus tinctorius
  done clear
  B)
  Pseudomonas cepacin
  done clear
  C)
  Gliocladium virens
  done clear
  D)
  Paedlomyces liladnus
  done clear
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• question_answer174) Which one of the following condition in humans is correctly matched with its chromosomal abnormality/linkage?
  A)
  Klinefelter's syndrome?44 autosomes + XXY
  done clear
  B)
  Colourblindness ? Y-linked
  done clear
  C)
  Erythroblastosis foetalis? X-linked
  done clear
  D)
  Down syndrome?44 autosomes + XO
  done clear
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• question_answer175) Which one of the following item gives its correct total number?
  A)
  Floating ribs in humans                                  ? 4
  done clear
  B)
  Amino acids found in proteins                    ? 16
  done clear
  C)
  Types of diabetes                                            ? 3
  done clear
  D)
  Cervical vertebrae in humans                     ? 8
  done clear
  View Answer play_arrow

• question_answer176) In germinating seeds fatty acids are degraded exclusively in the
  A)
  proplastids         
  done clear
  B)
         glyoxisomes                      
  done clear
  C)
  peroxisomes                     
  done clear
  D)
  mitochondria
  done clear
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• question_answer177) What does the filiform apparatus do at the entrance into ovule?
  A)
  It helps in the entry of pollen tube into a synergid
  done clear
  B)
  It prevents entry of more than one pollen tube into the embryo sac
  done clear
  C)
  It brings about opening of the pollen tube
  done clear
  D)
  It guides pollen tube from a synergid to egg
  done clear
  View Answer play_arrow

• question_answer178) Which one of the following is being tried in India as a biofuel substitute for fossil fuels?
  A)
  Jatropha             
  done clear
  B)
  Azadirachta                       
  done clear
  C)
  Musa                                    
  done clear
  D)
  Aegilops                              
  done clear
  View Answer play_arrow

• question_answer179) Which one of the following is resistant to enzyme action?
  A)
  Cork                      
  done clear
  B)
                                         Wood fibre
  done clear
  C)
  Pollen exine      
  done clear
  D)
  Leaf cuticle
  done clear
  View Answer play_arrow

• question_answer180) What is antisense technology?
  A)
  A cell displaying a foreign antigen used for synthesis of antigens.
  done clear
  B)
  Production of somaclonal variants in tissue cultures.
  done clear
  C)
  When a piece of RNA that is complementary in sequence is used to stop expression of a specific gene
  done clear
  D)
  RNA polymerase producing DNA
  done clear
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• question_answer181) Haploids are more suitable for mutation studies than the diploids. This is because
  A)
  haploids are reproductively more stable than diploids
  done clear
  B)
  mutagenes penetrate in haploids more effectively than is diploids
  done clear
  C)
  haploids are more abundant in nature than diploids
  done clear
  D)
  all mutations, whether dominant or recessive are expressed in haploids
  done clear
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• question_answer182) Which one of the following is not. A characteristic of phylum-Annelida?
  A)
  Closed circulatory system
  done clear
  B)
  Segmentation
  done clear
  C)
  Pseudocoelom
  done clear
  D)
  Ventral nerve cord
  done clear
  View Answer play_arrow

• question_answer183) Importance of day length in flowering of plants was first shown in
  A)
  Lemna                 
  done clear
  B)
         tobacco
  done clear
  C)
  cotton                                  
  done clear
  D)
  Petunia
  done clear
  View Answer play_arrow

• question_answer184) In humans, blood passes from the post caval to the diastolic right atrium of heart due to
  A)
  pushing open of the venous valves
  done clear
  B)
  suction pull
  done clear
  C)
  stimulation of the sino auricular node
  done clear
  D)
  pressure difference between the caval and atrium
  done clear
  View Answer play_arrow

• question_answer185) Which one of the following is the true description about an animal concerned?
  A)
  Earthworm         ? The alimentary canal consists of a sequence of pharynx, oesophagus, stomach, gizzard and intestine
  done clear
  B)
  Frog                       ? Body divisible into three regions? head, neck and trunk
  done clear
  C)
  Rat                         ? Left kidney is slightly higher in position than the right one
  done clear
  D)
  Cockroach           ? 10 pairs of spiracles (2 pairs on thorax and 8 pairs on abdomen)
  done clear
  View Answer play_arrow

• question_answer186) The linking of antibiotic resistance gene with the plasmid vector became possible with
  A)
  DNA ligase      
  done clear
  B)
         endonucleases
  done clear
  C)
  DNA polymerase
  done clear
  D)
        exonucleases
  done clear
  View Answer play_arrow

• question_answer187) Which one of the following statement is incorrect about menstruation?
  A)
  During normal menstruation about 40 mL blood is lost
  done clear
  B)
  The menstrual fluid can easily clot
  done clear
  C)
  At menopause in the female, there is especially abrupt increase in gonadotropic hormones
  done clear
  D)
  The beginning of the cycle of menstruation is called menarche
  done clear
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• question_answer188) Which one of the following phyla is correctly matched with its two general characteristics?
  A)
  Arthropoda    ? Body divided into head, thorax and abdomen and respiration by tracheae
  done clear
  B)
  Chordata                             ? Notochord at some stage and separate anal and urinary openings to the outside
  done clear
  C)
  Echinodermata                 ? Pentamerous radial symmetry and mostly internal fertilization
  done clear
  D)
  Mollusca                              ? Normally oviparous and development through a trochophore or veliger larva
  done clear
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• question_answer189) Which one of the following pair of items correctly belongs to the category of organs mentioned against it?
  A)
  Thorn of                               ? Analogous organs Bougainvillea   and tendrils of Cucurbita
  done clear
  B)
  Nictitating                           ? Vestigial organs membrane and blind spot in human eye
  done clear
  C)
  Nephridia                            ? Excretory organs of earthworm and Malpighian tubules of cockroach
  done clear
  D)
  Wings of honey bee       ? Homologous organs and wings of crow
  done clear
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• question_answer190) The chemiosmotic coupling hypothesis of oxidative phosphorylation proposes that Adenosine Triphosphate (ATP) is formed because
  A)
  high energy bonds are formed in mitochondrial proteins
  done clear
  B)
  ADP is pumped out of the matrix into the Inter membrane space
  done clear
  C)
  a proton gradient forms across the inner membrane
  done clear
  D)
  there is a change in the permeability of the inner mitochondrial membrane toward Adenosine Diphosphate (ADP)               
  done clear
  View Answer play_arrow

• question_answer191) Consider the following statements about biomedical technologies                         
  A)
  (A) During open heart surgery blood is circulated in the heart-lung machine.            (B) Blockage in coronary arteries is removed by angiography.                              (C) Computerized Axial Tomography (CAT) shows detailed internal structure as seen in a section of body.                            (D) X-ray provides clear and detailed images of organs like prostate glands and lungs. Which two of the above statements are correct? B and D                                
  done clear
  B)
  C and D
  done clear
  C)
         A and C                                
  done clear
  D)
  A and B
  done clear
  View Answer play_arrow

• question_answer192) Consider the following statements concerning food chains
  A)
  (A) removal of 80% tigers from an area resulted in greatly increased growth of vegetation (B) removal of most of the carnivores resulted in an increased population of deers (C) the length of food chains is generally limited to 3-4 trophic levels due to energy loss (D) the length of food chains may vary from 2 to 8 trophic levels Which two of the above statements are correct? B and C                
  done clear
  B)
  C and D                
  done clear
  C)
  A and D               
  done clear
  D)
  A and B
  done clear
  View Answer play_arrow

• question_answer193) Ascaris is characterised by
  A)
  absence of true coelom but presence of metamerism
  done clear
  B)
  presence of neither true coelom nor metamerism
  done clear
  C)
  presence of true coelom but absence of metamerism
  done clear
  D)
  presence of true coelom and mesmerism (metamerisation)
  done clear
  View Answer play_arrow

• question_answer194) Consider the following four statements (A-D) about certain desert animals such as kangaroo rat
  A)
  (A) they have dark colour and high rate of reproduction and excrete solid urine. (B) they do not drink water, breathe at a slow rate to conserve water and have their body covered with thick hairs.     (C) they feed on dry seeds and do not require drinking water. (D) they excrete very concentrated urine and do not use water to regulate body temperature. Which two of the above statements for such animals are true? C and D                
  done clear
  B)
  B and C               
  done clear
  C)
                                         C and A                
  done clear
  D)
         A and B
  done clear
  View Answer play_arrow

• question_answer195) Which one of the following is incorrect about the characteristics of protobionts (coacervates and microspheres) as envisaged in the abiogenic origin of life?
  A)
  They were able to reproduce
  done clear
  B)
  They could separate combinations of molecules from the surroundings     
  done clear
  C)
  They were partially isolated from the surroundings  
  done clear
  D)
  They could' maintain an internal environment                
  done clear
  View Answer play_arrow

• question_answer196) Which one of the following groups of three animals each is correctly matched with their one characteristic morphological feature?
  A)
                  Animals ,             Liver fluke, sea- cucumber           Morphological Feature                 Bilateral symmetry
  done clear
  B)
  Animals               Centipede, prawn, sea urchain -               Morphological Feature                 Jointed appendages
  done clear
  C)
  Animals               Scorpion, spider, cockroach-       Morphological Feature Ventral solid central nervous system,
  done clear
  D)
  Animals               Cockroach, locust, Taenia-           Morphological Feature Metameric segmentation
  done clear
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• question_answer197) The fruit is chambered, developed from inferior ovary and has seeds with succulent testa in           
  A)
  pomegranate
  done clear
  B)
         orange
  done clear
  C)
  guava                   
  done clear
  D)
  cucumber
  done clear
  View Answer play_arrow

• question_answer198) Which one of the following is the correct percentage of the two (out of the total of 4) green-house gases that contribute to the total global warming?
  A)
  \[CFCs\,14%,\,\,C{{H}_{4}}20%\]
  done clear
  B)
  \[C{{O}_{2}}40%,CFCs30%\]
  done clear
  C)
  \[{{N}_{2}}O6%,C{{O}_{2}}86%\]
  done clear
  D)
  \[C{{H}_{4}}20%,{{N}_{2}}O18%\]           
  done clear
  View Answer play_arrow

• question_answer199) World Summit on Sustainable Development (2002) was held in
  A)
  Brazil   
  done clear
  B)
                                         Sweden
  done clear
  C)
  Argentina,          
  done clear
  D)
  South Africa
  done clear
  View Answer play_arrow

• question_answer200) Quercus species are the dominant component in
  A)
  temperate deciduous forests
  done clear
  B)
  alpine forests
  done clear
  C)
  scrub forests
  done clear
  D)
  tropical rain forests
  done clear
  View Answer play_arrow