Solved papers for J & K CET Medical J & K - CET Medical Solved Paper-2012

done J & K - CET Medical Solved Paper-2012 Total Questions - 225

• question_answer1) Which of the following is a true statement?
  A)
   The   total   entropy   of thermally interacting systems is conserved
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  B)
   Carnot engine has 100% efficiency
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  C)
   Total entropy does not change in a reversible process
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  D)
   Total entropy in an irreversible process can either increase or decrease
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• question_answer2) Which of the following is not related to the Bernoullis principle?
  A)
   Rise of a liquid column inside a capillary
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  B)
   Operation of a venturimeter
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  C)
   Lift provided to an aeroplane by the air
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  D)
   Propelling   force   provided   to   an aeroplane by its propellers
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• question_answer3) A steel wire can support a maximum load of w before reaching its elastic limit. How much load can another wire, made out of identical steel, but with a radius one half the radius of the first wire, support before reaching its elastic limit?
  A)
   \[w\]
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  B)
   \[\frac{w}{2}\]
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  C)
   \[\frac{w}{4}\]
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  D)
   \[4w\]
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• question_answer4) Which of the following laws of thermodynamics forms the basis for the definition of temperature?
  A)
   First law        
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  B)
   Zerothlaw
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  C)
   Second law      
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  D)
   Third law
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• question_answer5) The air pressure inside a soap bubble of radius R exceeds the outside air pressure by 10 Pa. By how much will the pressure inside a bubble of radius 2R exceed the outside air pressure?
  A)
   20 Pa           
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  B)
   40 Pa
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  C)
   2.5 Pa           
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  D)
   5 Pa
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• question_answer6) Taking the radius of the earth to be 6400 km, by what percentage will the acceleration due to gravity at a height of 100 km from the surface of the earth differ from that on the surface of the earth?
  A)
   About 1.5%     
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  B)
   About 5%
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  C)
   About 8%       
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  D)
   About 3%
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• question_answer7) Which of the following statements is true for the three types of magnetism - para, dia and ferro?
  A)
   Paramagnetism   is   associated   with negative susceptibility and dia and ferromagnetism      with      positive susceptibility
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  B)
   Diamagnetism is generally weakest of the three and is associated with negative susceptibility
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  C)
   Ferromagnetism is the strongest of the three and is associated with negative susceptibility
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  D)
   All three are associated with positive susceptibility, diamagnetism is the weakest form of magnetism and ferromagnetism is the strongest form
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• question_answer8) The molecules in an ideal gas at\[27{}^\circ C\]have a certain mean velocity. At what approximate temperature, will the mean velocity be doubled?
  A)
  \[54{}^\circ C\]          
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  B)
   \[327{}^\circ C\]
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  C)
   \[1200{}^\circ C\]         
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  D)
   \[927{}^\circ C\]
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• question_answer9) Which of the two (i) compressing a gas isothermally until its volume is reduced by half (ii) compressing the same gas adiabatically until its volume is reduced by half, will require more work to be done?
  A)
   (i)
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  B)
   (ii)
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  C)
   Both will require the same amount of work
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  D)
   It will depend upon the nature of the gas
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• question_answer10) Three coplanar, parallel, long straight wires are equally spaced, that is, the distance between each pair of successive wires is the same. The first and the third wire carry currents of 1 A each, in the same direction. What must be the current in the second wire (wire in the middle), so that the other two wires do not feel any net force?
  A)
   0.25 A in opposite direction to those in the first and the third
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  B)
   0.5 A in the same direction as those in the first and the third
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  C)
   0.5 A in the opposite direction to those in the first and the third
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  D)
   0.25 A in the same direction as those in the first and the third
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• question_answer11) A conducting rod of length L is moving in a uniform magnetic field  with a velocity v without rotation. The velocity of the rod is perpendicular to the rod, and the motion of the rod is confined to a plane perpendicular to the magnetic field. What is the induced emf developed across the rod?
  A)
   \[BLv\]
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  B)
   \[B{{v}^{2}}L\]
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  C)
   \[\frac{BL}{v}\]
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  D)
   \[B{{L}^{2}}v\]
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• question_answer12) What is the resonance frequency of a driven. L-C-R oscillator?
  A)
   \[\frac{1}{LC}\]
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  B)
   \[\frac{1}{2\pi LC}\]
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  C)
   \[{{(LC)}^{-1/2}}\]
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  D)
   \[{{(2\pi LC)}^{-1/2}}\]
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• question_answer13) A bar magnet is placed upright on a floor (so that the axis of the magnet is vertical). A copper ring is held above the magnet, with its plane horizontal and released. The copper ring falls in such a manner that its axis always coincides with that of/ the magnet. What will be the acceleration with which the ring will fall? Acceleration due to gravity is\[10\text{ }m/{{s}^{2}}\].
  A)
   \[10\text{ }m/{{s}^{2}}\]
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  B)
   less than\[10\text{ }m/{{s}^{2}}\]
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  C)
   more than\[10\text{ }m/{{s}^{2}}\]
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  D)
   the answer will depend upon which pole of the magnet is up
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• question_answer14) A short solenoid of radius a, number of turns per unit length n^ and length L is kept coaxially inside a very long solenoid of radius b, number of turns per unit length\[{{n}_{2}}\]. What is the mutual inductance of the system?
  A)
   \[{{\mu }_{0}}\pi {{b}^{2}}{{n}_{1}}{{n}_{2}}L\]
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  B)
   \[{{\mu }_{0}}\pi {{a}^{2}}{{n}_{1}}{{n}_{2}}{{L}^{2}}\]
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  C)
   \[{{\mu }_{0}}\pi {{a}^{2}}{{n}_{1}}{{n}_{2}}L\]
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  D)
   \[{{\mu }_{0}}\pi {{b}^{2}}{{n}_{1}}{{n}_{2}}{{L}^{2}}\]
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• question_answer15) Which of the following is a semiconductor?
  A)
   \[F{{e}_{2}}{{O}_{3}}\]           
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  B)
   \[Si{{O}_{2}}\]
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  C)
   \[GaAs\]           
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  D)
   \[CuO\]
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• question_answer16) What is the order of the reverse saturation current before break down in a Zener diode?
  A)
   Ampere
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  B)
   Milli-ampere
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  C)
   It depends on the applied voltage
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  D)
   Micro-ampere
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• question_answer17) Which logic gate does the following truth table represent?

  Input A	Input B	Input Q
  0	0	1
  0	1	1
  1	0	1
  1	1	0

  A)
   NAND        
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  B)
   AND
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  C)
   OR           
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  D)
   NOR
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• question_answer18) What is the equivalent expression of the decimal number 212 in binary number system?
  A)
   11000100      
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  B)
   10010100
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  C)
   11010100      
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  D)
   11010110
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• question_answer19) Why do we need carrier wave of high frequency to transmit audio signal over long distances?
  A)
   High frequency carrier wave can propagate with a faster speed
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  B)
   High frequency carrier waves offer availability of higher transmission bandwidth
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  C)
   High frequency carrier waves offer availability   of lower   transmission bandwidth
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  D)
   High frequency carrier waves is easy to produce
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• question_answer20) What does the Poynting vector represent?
  A)
   Power flowing across unit area in an electromagnetic field
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  B)
   Charge flowing across unit area per unit time in an electromagnetic field
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  C)
   Momentum flowing across unit area per unit time in an electromagnetic field
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  D)
   Angular momentum flowing across unit area per unit time in an electromagnetic field
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• question_answer21) In television transmission what type of modulation is used?
  A)
   Only amplitude modulation
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  B)
   Only frequency modulation
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  C)
   Both   amplitude   and   frequency modulation
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  D)
   TV signal does not need any kind of modulation
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• question_answer22) Which of the following is true for any collision?
  A)
   Both linear momentum and kinetic energy are conserved
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  B)
   Neither linear momentum nor kinetic energy may be conserved
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  C)
   Linear momentum is always conserved, however, kinetic energy may or may not be conserved
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  D)
   Kinetic energy is always conserved, but linear momentum may or may not be conserved
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• question_answer23) A uniform rod of length L and mass M is held vertical, with its bottom end pivoted to the floor. The rod falls under gravity, freely turning about the pivot. If acceleration due to gravity is g, what is the instantaneous angular speed of the rod when it makes an angle\[60{}^\circ \]with the vertical?
  A)
   \[{{\left( \frac{g}{L} \right)}^{1/2}}\]
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  B)
   \[{{\left( \frac{3g}{4L} \right)}^{1/2}}\]
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  C)
   \[{{\left( \frac{3\sqrt{3}g}{2L} \right)}^{1/2}}\]
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  D)
   \[{{\left( \frac{3g}{2L} \right)}^{1/2}}\]
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• question_answer24) A cheetah, weighing 150 kg, chases a deer, weighing 30 kg, in a straight path. The speed of the cheetah is 20 m/s and that of the deer is 25 m/s. The approximate speed of the centre of mass of the pair is
  A)
   21 m/s
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  B)
   24 m/s
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  C)
   26 m/s
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  D)
   zero
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• question_answer25) A tennis racket can be idealized as a uniform ring of mass M and radius R, attached to a uniform rod also of mass M and length L. The rod and the ring are coplanar and the line of the rod passes through the centre of the ring. The moment of inertia of the object (racket) about an axis through the centre of the ring and perpendicular to its plane is
  A)
   \[\frac{1}{12}M(6{{R}^{2}}+{{L}^{2}})\]
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  B)
   \[\frac{1}{12}M(18{{R}^{2}}+{{L}^{2}})\]
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  C)
   \[\frac{1}{3}M(6{{R}^{2}}+{{L}^{2}}+3LR)\]
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  D)
   None of the above
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• question_answer26) How long will a satellite, placed in a circular orbit of radius that is\[{{\left( \frac{1}{4} \right)}^{th}}\]the radius of a geostationary satellite, take to complete one revolution around the earth?
  A)
   12 h            
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  B)
   6 h
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  C)
   3 h              
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  D)
   4 days
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• question_answer27) A rocket is fired from inside a deep mine, so as to escape the earths gravitational field. The minimum velocity to be rocket is
  A)
   exactly the same as the escape velocity of fire from the earths surface
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  B)
   a little more than the escape velocity of fire from the earths surface  
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  C)
   a little less than the escape velocity of fire from the earths surface
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  D)
   Infinity   
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• question_answer28) Which of the following is the correct Kirchhoffs loop rule?     
  A)
   The algebraic sum of the currents meeting at a junction is zero
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  B)
   The algebraic sum of potential drops, across all resistors in a circuit is zero
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  C)
   The algebraic sum of the currents across all the resistors in a circuit is zero
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  D)
   The algebraic sum of potential drops across all resistors plus those across sources in a circuit is zero
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• question_answer29) What are the dimensions of electrical conductivity?
  A)
   \[[M{{L}^{-3}}{{T}^{3}}{{I}^{2}}]\]
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  B)
   \[[{{M}^{-1}}{{L}^{3}}{{T}^{2}}{{I}^{3}}]\]
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  C)
   \[[{{M}^{-1}}{{L}^{-2}}{{T}^{3}}{{I}^{2}}]\]
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  D)
   \[[{{M}^{-1}}{{L}^{-3}}{{T}^{3}}I]\]
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• question_answer30) A coil has resistance\[25.00\,\Omega \]and\[25.17\,\Omega \]at \[20{}^\circ C\]and\[35{}^\circ C\]respectively. What is the temperature coefficient of resistance?
  A)
   \[4.545\times {{10}^{-7}}/{}^\circ C\]
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  B)
   \[4.545\times {{10}^{-3}}/{}^\circ C\]
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  C)
   \[4.545\times {{10}^{-2}}/{}^\circ C\]
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  D)
   \[4.545\times {{10}^{-5}}/{}^\circ C\]
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• question_answer31) An electron and a proton, both having the same kinetic energy, enter a region of uniform magnetic field, in a plane perpendicular to the field. If their masses are denoted by\[{{m}_{e}}\]and\[{{m}_{p}}\] respectively, then the ratio of the radii (electron to proton) of their circular orbits is
  A)
   \[\sqrt{\frac{{{m}_{p}}}{{{m}_{e}}}}\]
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  B)
   \[\sqrt{\frac{{{m}_{e}}}{{{m}_{p}}}}\]
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  C)
   \[\frac{{{m}_{e}}}{{{m}_{p}}}\]
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  D)
   \[1\]
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• question_answer32) In using Amperes law to find the magnetic field of a straight, long solenoid, the loop (Amperian loop) that is taken is
  A)
   a circular loop, coaxial with the solenoid
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  B)
   a rectangular  loop  in   a  plane perpendicular to the axis of the solenoid
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  C)
   a rectangular loop in a plane containing the axis of the solenoid, the loop being totally within the solenoid
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  D)
   a rectangular loop in a plane containing the axis of the solenoid, the loop being partly inside the solenoid and partly outside it
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• question_answer33) A rectangular coil, of sides 2 cm and 3 cm respectively, has 10 turns in it. It carries a current of 1 A, and is placed in a uniform magnetic field of 0.2 T in such a manner that its plane makes an angle\[60{}^\circ \]with the field direction. The torque on the loop is
  A)
   \[6.0\times {{10}^{-4}}N-m\]   
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  B)
   \[6.0\times {{10}^{-5}}N-m\]
  done clear
  C)
   \[1.2\times {{10}^{-3}}N-m\]   
  done clear
  D)
   6.0 N-m
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• question_answer34) Which of the following facts about the photoelectric effect can be understood without invoking the quantum concept of light propagation?
  A)
   The rate of photoelectrons emission, when they are emitted, increases with the intensity of light used
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  B)
   There is a threshold frequency, below which no photoelectrons are emitted, no matter how long the light is thrown on the metallic surface
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  C)
   Once the frequency of light is more than the threshold frequency, photoelectrons are emitted almost instantaneously, no matter how weak the light intensity is
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  D)
   For each frequency of light, exceeding the threshold frequency, there is a maximum kinetic energy of the emitted electrons
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• question_answer35) Consider the four gases-hydrogen, oxygen, nitrogen and helium, at the same temperature. Arrange them in the increasing order of the de-Broglie wavelengths of their molecules
  A)
   hydrogen, helium, nitrogen, oxygen
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  B)
   oxygen, nitrogen, hydrogen, helium
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  C)
   oxygen, nitrogen, helium, hydrogen
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  D)
   nitrogen, oxygen, helium, hydrogen
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• question_answer36) The half-life of\[^{60}Co\] is approximately 5.25 years. In a sample containing 1 g of freshly prepared\[^{60}Co,\]how much of the isotope will be left after 21 years?
  A)
   125 mg         
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  B)
   62.5 mg
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  C)
   Nothing will be left
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  D)
   31.25 mg
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• question_answer37) Which of the following is true of the Balmer series of the hydrogen spectrum?
  A)
   The entire series falls in the ultraviolet region
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  B)
   The entire series falls in the infrared region
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  C)
   The series is partly in the visible region and partly in the ultraviolet region
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  D)
   The series is partly in the visible region and partly in the infrared region
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• question_answer38) In a nuclear fusion reaction, two nuclei, A and B, fuse to produce a nucleus C, releasing an amount of energy\[\Delta E\]in the process. If the mass defects of the three nuclei are\[\Delta {{M}_{A}},\Delta {{M}_{B}}\]and\[\Delta {{M}_{C}}\]respectively, then which of the following relations holds? Here, c is the speed of light
  A)
   \[\Delta {{M}_{A}}+\Delta {{M}_{B}}=\Delta {{M}_{C}}-\Delta E/{{c}^{2}}\]
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  B)
   \[\Delta {{M}_{A}}+\Delta {{M}_{B}}=\Delta {{M}_{C}}+\Delta E/{{c}^{2}}\]
  done clear
  C)
   \[\Delta {{M}_{A}}-\Delta {{M}_{B}}=\Delta {{M}_{C}}-\Delta E/{{c}^{2}}\]
  done clear
  D)
   \[\Delta {{M}_{A}}-\Delta {{M}_{B}}=\Delta {{M}_{C}}+\Delta E/{{c}^{2}}\]
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• question_answer39) Which of the following postulates of the Bohr model led to the quantization of energy of the hydrogen atom?
  A)
   The electron goes around the nucleus in circular orbits
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  B)
   The angular momentum of the electron can only be an integral multiple of h/2n
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  C)
   The magnitude of the linear momentum of the electron is quantized
  done clear
  D)
   Quantization of energy is itself a postulate of the Bohr model
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• question_answer40) A certain vector in the\[x-y\]plane has an \[x-\] component of 12 m and a\[y-\]component of 8 m. It is then rotated in the\[x-y\]plane so that its\[x-\]component is halved. Then its new y-component is approximately
  A)
   14m           
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  B)
   13.11m
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  C)
   10m           
  done clear
  D)
   2.0m
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• question_answer41) A block is placed on a plane inclined at\[12{}^\circ \]to the horizontal. What is the, maximum value of coefficient of static friction for which the block slides down the plane?
  A)
   \[tan\text{ }12{}^\circ \]          
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  B)
   \[\text{cos }12{}^\circ \]
  done clear
  C)
   \[\text{sin }12{}^\circ \]          
  done clear
  D)
   None of these
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• question_answer42) A brick of mass m , tied to a rope, is being whirled in a vertical circle, with a uniform speed. The tension in the rope is
  A)
   the same throughout
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  B)
   largest when the brick is at the highest point of the circular path and smallest when it is at the lowest point
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  C)
   largest when the rope is horizontal and smallest when it is vertical
  done clear
  D)
   largest when the brick is at the lowest point and smallest when it is at the highest point
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• question_answer43) Two blocks, of mass 1 kg and 2 kg respectively, are connected by a spring and kept on a frictionless table. The blocks are pulled apart, so that the spring is stretched, and released from rest. At a certain instant of time, the block of mass 1 kg, is found to be moving at a speed 2 m/s. What must be the speed of the other block at this instant?
  A)
   1 m/s           
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  B)
   0.5 m/s
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  C)
   4 m/s            
  done clear
  D)
   0.25 m/s
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• question_answer44) A coin of mass 10 g rolls along a horizontal table with a velocity of 6 cm/s. Its total kinetic energy is
  A)
   \[9\,\mu J\]             
  done clear
  B)
   \[18\,\mu J\]
  done clear
  C)
   \[27\,\mu J\]            
  done clear
  D)
   \[36\,\mu J\]
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• question_answer45) A simple harmonic oscillator oscillates, with an amplitude A. At what point of its motion, is the power delivered to it by the restoring force maximum?
  A)
   When it is at a displacement\[\pm \frac{A}{\sqrt{2}}\]from the equilibrium point and moving towards the equilibrium point
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  B)
   When it is at the maximum displacement
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  C)
   When it passes through the equilibrium point, either way
  done clear
  D)
   When it is at a displacement\[\pm \frac{A}{\sqrt{2}}\]from the equilibrium point and moving away from the equilibrium point
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• question_answer46) There is a point charge q located at the centre of a cube. What is the electric flux of this point charge, through a face of the cube?
  A)
   \[\frac{q}{{{\varepsilon }_{0}}}\]
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  B)
   \[\frac{q}{6{{\varepsilon }_{0}}}\]
  done clear
  C)
   \[\frac{q}{3{{\varepsilon }_{0}}}\]
  done clear
  D)
   It will depend upon the size of the cube
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• question_answer47) A point dipole is located at the origin in some orientation. The electric field at the point (10 cm, 10 cm) on the\[x-y\]plane is measured to have a magnitude\[1.0\times {{10}^{-3}}V/m\]. What will be the magnitude of the electric field at the point (20 cm, 20 cm)?
  A)
   \[5.0\times {{10}^{-4}}V/m\]
  done clear
  B)
   \[2.5\times {{10}^{-4}}V/m\]
  done clear
  C)
   It will depend on the orientation of the dipole
  done clear
  D)
   \[1.25\times {{10}^{-4}}V/m\]
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• question_answer48) Which of the following statements is false for a perfect conductor?
  A)
   The surface of the conductor is an equipotential surface
  done clear
  B)
   The electric field just outside the surface of a conductor is perpendicular to the surface
  done clear
  C)
   The charge carried by a conductor is always uniformly distributed over the surface of the conductor
  done clear
  D)
   None of the above
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• question_answer49) A parallel plate capacitor without any dielectric within its plates, has a capacitance C and is connected to a battery of emf V. The battery is disconnected and the plates of the capacitor are pulled apart until the separation between the plates is doubled. What is the work done by the agent pulling the plates apart, in this process?
  A)
   \[\frac{1}{2}C{{V}^{2}}\]
  done clear
  B)
   \[\frac{3}{2}C{{V}^{2}}\]
  done clear
  C)
   \[-\frac{3}{2}C{{V}^{2}}\]
  done clear
  D)
   \[C{{V}^{2}}\]
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• question_answer50) Consider a copper wire of length L, cross-sectional area A. It has n number of free electrons per unit volume. Which of the following is the correct expression of drift velocity of the electrons when the wire carries a steady current\[I\]?
  A)
   \[\frac{I}{neL}\]
  done clear
  B)
   \[\frac{I}{{{n}^{2}}eL}\]
  done clear
  C)
   \[\frac{I}{neL}\]
  done clear
  D)
   \[\frac{I}{n{{e}^{2}}L}\]
  done clear
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• question_answer51) A resistor has the following colour code, sequentially from the left Black Brown Orange Red and Black What is the resistance of the resistor?
  A)
   \[13\,\Omega \]           
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  B)
   \[1300\,\,\Omega \]
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  C)
   \[130\,\,\Omega \]
  done clear
  D)
   \[13000\,\,\Omega \]
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• question_answer52) Which of the following is false for interference of light?
  A)
   Coherence of the sources is an essential condition for interference
  done clear
  B)
   The minima of the interference pattern need not be of zero intensity
  done clear
  C)
   Interference simply redistributes light energy, without destroying any of it
  done clear
  D)
   The minima of the interference pattern must always be of zero intensity
  done clear
  View Answer play_arrow

• question_answer53) Totally unpolarized light of intensity\[{{I}_{0}}\]is incident normally on a polarizer and the emerging light is made to pass through a second, parallel polarizer with its axis making an angle of\[60{}^\circ \]with that of the first. What is the intensity of light emerging out of the second polarizer?
  A)
   Zero             
  done clear
  B)
   \[\frac{{{I}_{0}}}{8}\]
  done clear
  C)
   \[\frac{{{I}_{0}}}{4}\]
  done clear
  D)
   \[\frac{{{I}_{0}}}{16}\]
  done clear
  View Answer play_arrow

• question_answer54) A concave mirror has a focal length of 5 cm. When an object is placed at a distance of 15 cm from the mirror, where is the image formed?
  A)
   10 cm in front of the mirror
  done clear
  B)
   7.5 cm behind the mirror
  done clear
  C)
   2.5 cm in front of the mirror
  done clear
  D)
   7.5 cm in front of the mirror
  done clear
  View Answer play_arrow

• question_answer55) The power of a convex lens is 2 dioptre. Its power is to be reduced to 1.5 dioptre, by putting another lens in combination with it. Which of the following lenses will serve the purpose?
  A)
   A concave lens of focal length 2 m
  done clear
  B)
   A concave lens of focal lens 4 m
  done clear
  C)
   A convex lens of focal lens 2 m
  done clear
  D)
   A concave lens of focal length 1 m
  done clear
  View Answer play_arrow

• question_answer56) Spherical wave fronts, emanating from a point source, strike a plane reflecting surface. What will happen to these wave fronts, immediately after reflection?
  A)
   They will remain spherical with the same curvature, both in magnitude and sign
  done clear
  B)
   They will become plane wave fronts
  done clear
  C)
   They will remain spherical, with the same curvature, but sign of curvature reversed
  done clear
  D)
   They will remain spherical, but with different curvature, both in magnitude and sign
  done clear
  View Answer play_arrow

• question_answer57) Which of the following is true for the minimum angular separation of two stars,\[\Delta {{\theta }_{\min }}\]at can be resolved by a telescope? In the following aperture is the diameter of the objective
  A)
   it decreases with the increase in aperture of the telescope
  done clear
  B)
   it is independent of the aperture of the telescope
  done clear
  C)
   it increases linearly with the aperture of the telescope
  done clear
  D)
   it increases quadratically with the aperture of the telescope
  done clear
  View Answer play_arrow

• question_answer58) The flux density of mass is defined as the amount of mass crossing unit area per unit time. The dimensions of this quantity is
  A)
   \[[M{{L}^{-2}}{{T}^{-1}}]\]      
  done clear
  B)
   \[[M{{L}^{2}}{{T}^{-1}}]\]
  done clear
  C)
   \[[ML{{T}^{-1}}]\]     
  done clear
  D)
   \[[{{M}^{-1}}{{L}^{-2}}T]\]
  done clear
  View Answer play_arrow

• question_answer59) A physical quantity z, depends upon two other physical quantities\[x\]and y, as follows. \[z=a{{x}^{2}}{{y}^{1/2}}\]where, a is a constant. In an experiment, the quantity\[x\]is determined by measuring z and y and using the above expression. If the percentage of error in the measurement of z and y are 10% and 12% respectively, then the percentage of error in the determined value of\[x\]is
  A)
   2%
  done clear
  B)
   8%
  done clear
  C)
   15%
  done clear
  D)
   without the value of the constant a, the percentage of error cannot be calculated
  done clear
  View Answer play_arrow

• question_answer60) If a particle moves with an acceleration, then which of the following can remain constant?
  A)
   Both speed and velocity
  done clear
  B)
   Neither speed nor velocity
  done clear
  C)
   Only the velocity
  done clear
  D)
   Only the speed
  done clear
  View Answer play_arrow

• question_answer61) A rubber ball is bounced on the floor of a room which has its ceiling at a height of 3.2 m from the floor. The ball hits the floor with a speed of 10 m/s and rebounds vertically up. If all collisions simply reverse the velocity of the ball, without changing its speed, then how long does it take the ball for a round trip, from the moment it bounces from the floor to the moment it returns back to it? Acceleration due to gravity is\[10\text{ }m/{{s}^{2}}\].
  A)
   4s             
  done clear
  B)
   2s
  done clear
  C)
   0.8 s           
  done clear
  D)
   1.2 s
  done clear
  View Answer play_arrow

• question_answer62) Two vectors a and b, add up to vector c. When vector a is made 3 times as long and vector b is doubled in length, without changing their directions, then it is found that vector c is also doubled in length, without change in direction. Then which of the following is true?
  A)
   All three vectors must be parallel
  done clear
  B)
   b and c must be parallel to each other, but a need not be parallel to b and c
  done clear
  C)
   a and b must be perpendicular to each other
  done clear
  D)
   It is impossible for three non-zero vectors a, b and c to have the property stated above
  done clear
  View Answer play_arrow

• question_answer63) Which of the following is not an assumption of the kinetic theory of gases?
  A)
   The molecules travel in straight paths until they undergo collision with other molecules
  done clear
  B)
   Molecules of the gas are small hard spheres, occupying negligible volume compared with the total volume of the gas
  done clear
  C)
   The molecules do not undergo any collisions at all
  done clear
  D)
   The molecules undergo elastic collisions only
  done clear
  View Answer play_arrow

• question_answer64) The equation describing the motion of a simple harmonic oscillator along the\[x\]axis is given as \[x=A\cos (\omega t+\phi )\]. If at time\[t=0,\]the oscillator is at\[x=0\]and moving in the negative\[x-\]direction, then the phase angle\[\phi \]is
  A)
   \[\frac{\pi }{2}\]
  done clear
  B)
   \[-\frac{\pi }{2}\]
  done clear
  C)
   \[\pi \]
  done clear
  D)
   \[0\]
  done clear
  View Answer play_arrow

• question_answer65) At a displacement from the equilibrium position, that is one-half the amplitude of oscillation, what fraction of the total energy of the oscillator is kinetic energy?
  A)
   \[\frac{1}{2}\]
  done clear
  B)
   \[\frac{1}{4}\]
  done clear
  C)
   \[\frac{1}{\sqrt{2}}\]
  done clear
  D)
   \[\frac{3}{4}\]
  done clear
  View Answer play_arrow

• question_answer66) Which of the following does not change as a wave moves from one medium to another?
  A)
   Wavelength     
  done clear
  B)
   Wave velocity
  done clear
  C)
   Frequency      
  done clear
  D)
   None of these
  done clear
  View Answer play_arrow

• question_answer67) An organ pipe is closed at one end and open at the other. What is the ratio of frequencies of the 3rd and 4th fundamental modes of vibration?
  A)
   \[\frac{3}{4}\]
  done clear
  B)
   \[\frac{5}{7}\]
  done clear
  C)
   \[\frac{3}{5}\]
  done clear
  D)
   \[\frac{9}{11}\]
  done clear
  View Answer play_arrow

• question_answer68) The Doppler shift in the frequency received by a stationary receiver when the source is moving towards it, was measured to be\[\Delta {{v}_{air}}\]when both receiver and source are in air, and it was measured to be\[\Delta {{v}_{water}}\]when both are under water. Then,
  A)
   \[\Delta {{v}_{air}}>\Delta {{v}_{water}}\]
  done clear
  B)
   \[\Delta {{v}_{air}}<\Delta {{v}_{water}}\]
  done clear
  C)
   \[\Delta {{v}_{air}}=\Delta {{v}_{water}}\]
  done clear
  D)
   \[\Delta {{v}_{water}}=0,\Delta {{v}_{air}}<0\]
  done clear
  View Answer play_arrow

• question_answer69) Which of the following is false for electric lines of force?
  A)
   They always start from positive charges and terminate on negative charges
  done clear
  B)
   They are always perpendicular to the surface of a charged conductor
  done clear
  C)
   They always form closed loops
  done clear
  D)
   They are parallel and equally spaced in a region of uniform electric field
  done clear
  View Answer play_arrow

• question_answer70) A uniform magnetic field B points vertically up and is slowly changed in magnitude, but not in direction. The rate of change of the magnetic field is a. A conducting ring of radius r and resistance R is held perpendicular to the magnetic field, and is totally inside it. The induced current in the ring is
  A)
   zero              
  done clear
  B)
   \[\frac{2\pi rB}{R}\]
  done clear
  C)
   \[\frac{r\alpha }{R}\]
  done clear
  D)
   \[\frac{\pi {{r}^{2}}\alpha }{R}\]
  done clear
  View Answer play_arrow

• question_answer71) A plane electromagnetic wave is propagating along the z-direction. If the electric field component of this wave is in the direction \[(i+j),\]then which of the following, is the direction of the magnetic field component?
  A)
   \[(-i+j)\]
  done clear
  B)
   \[(i-j)\]
  done clear
  C)
   \[(-i-j)\]
  done clear
  D)
   \[(i+j)\]
  done clear
  View Answer play_arrow

• question_answer72) Which of the following is the correct arrangement   of   the   electromagnetic spectrum in the increasing order of frequency?
  A)
   Microwaves,  infrared,  radio waves, visible light. X-rays
  done clear
  B)
   Radio waves, microwaves, infrared, visible light. X-rays
  done clear
  C)
   X-rays,    visible    light,    infrared, microwaves, radio waves
  done clear
  D)
   Microwaves, radio waves, infrared, visible light. X-rays
  done clear
  View Answer play_arrow

• question_answer73) Which of the following optical phenomena is involved in the propagation of light in an optical fibre?
  A)
   Refraction
  done clear
  B)
   Dispersion
  done clear
  C)
   Interference
  done clear
  D)
   Total internal reflection
  done clear
  View Answer play_arrow

• question_answer74) In a Youngs double-slits experimental arrangement, the light used has wavelength \[5000\text{ }\overset{o}{\mathop{\text{A}}}\,,\] the slit separation is 2 mm and slits to screen distance is 1 m. What is the width of the fringes produced on the screen?
  A)
   0.25 mm        
  done clear
  B)
   0.1 mm
  done clear
  C)
   0.5 mm         
  done clear
  D)
   0.025 mm
  done clear
  View Answer play_arrow

• question_answer75) In a single-slit diffraction experiment, the width of the slit is reduced by half. Which of the following needs to be done if the width of the central maxima has to remain the same?
  A)
   Reduce the distance between the slit and screen by half
  done clear
  B)
   Reduce the distance between the slit and the screen to\[{{\left( \frac{1}{4} \right)}^{th}}\]the original separation
  done clear
  C)
   Double the distance between the slit and the screen
  done clear
  D)
   No need to do anything, as the width of the central maxima does not depend on the slit width
  done clear
  View Answer play_arrow

• question_answer76) Molar conductivity decreases with decrease in concentration
  A)
  for strong electrolytes
  done clear
  B)
  for weak electrolytes
  done clear
  C)
  both for strong and weak electrolytes
  done clear
  D)
  for non-electrolytes
  done clear
  E)
  None of the Above
  done clear
  View Answer play_arrow

• question_answer77) A nucleophilic substitution reaction proceeds through\[{{S}_{N}}1\]mechanism. So, the reaction is
  A)
   unimolecular
  done clear
  B)
   bimolecular
  done clear
  C)
   trimolecular
  done clear
  D)
   rate depends on concentration of incoming nucleophile
  done clear
  View Answer play_arrow

• question_answer78) For an electrophilic aromatic substitution reaction
  A)
   chlorine is o-p directing group and also electron releasing group
  done clear
  B)
   chlorine is o-p directing group and also electron with drawing group
  done clear
  C)
   chlorine is meta directing group and also electron relasing group
  done clear
  D)
   chlorine is meta directing group and also electron withdrawing group
  done clear
  View Answer play_arrow

• question_answer79) Enthalpy of combustion of carbon to\[C{{O}_{2}}\]is\[-393.52\text{ }kJ/mol\]. The heat released upon formation of 11 g of\[C{{O}_{2}}\]from carbon and dioxygen is
  A)
   35.77 kJ
  done clear
  B)
   98.38 kJ
  done clear
  C)
   1574.08 kJ
  done clear
  D)
   393.52 kJ
  done clear
  View Answer play_arrow

• question_answer80) Entropy change in a process where 1 L of liquid He is poured into ice cold water is
  A)
   finite and positive
  done clear
  B)
   finite and negative
  done clear
  C)
   zero
  done clear
  D)
   infinity
  done clear
  View Answer play_arrow

• question_answer81) Anode reaction of a fuel cell is
  A)
   \[Zn(Hg)+2O{{H}^{-}}\xrightarrow[{}]{{}}ZnO(s)+{{H}_{2}}O+2{{e}^{-}}\]
  done clear
  B)
   \[Pb(s)+SO_{4}^{2-}(aq)\xrightarrow[{}]{{}}PbS{{O}_{4}}(s)+2{{e}^{-}}\]
  done clear
  C)
   \[2{{H}_{2}}(g)+4O{{H}^{-}}(aq)\xrightarrow[{}]{{}}4{{H}_{2}}O(l)+4{{e}^{-}}\]
  done clear
  D)
   \[2Fe(s)\xrightarrow[{}]{{}}2F{{e}^{2+}}+4{{e}^{-}}\]
  done clear
  View Answer play_arrow

• question_answer82) For an ideal system at thermal equilibrium, the velocity distribution of the constituent particles will be governed by
  A)
   Gaussian distribution
  done clear
  B)
   Maxwell-Boltzmann distribution
  done clear
  C)
   Lorentzian distribution
  done clear
  D)
   Log-normal distribution
  done clear
  View Answer play_arrow

• question_answer83) During  spontaneous  discharge  of an electrochemical cell Gibbs free energy will
  A)
   increase         
  done clear
  B)
   decrease
  done clear
  C)
   not change      
  done clear
  D)
   be infinity
  done clear
  View Answer play_arrow

• question_answer84) Standard electrode potential of half-cell reactions are given below \[C{{u}^{2+}}+2{{e}^{-}}\xrightarrow[{}]{{}}Cu;\] \[E{}^\circ =0.34V\] \[Z{{n}^{2+}}+2{{e}^{-}}\xrightarrow[{}]{{}}Zn;\] \[E{}^\circ =-0.76V\] What is the emf of the cell?
  A)
   \[+1.10V\]        
  done clear
  B)
   \[-1.10V\]
  done clear
  C)
   \[-0.42V\]         
  done clear
  D)
   \[+0.42V\]
  done clear
  View Answer play_arrow

• question_answer85) Tollens test can be used to distinguish
  A)
   propionaldehyde and acetone
  done clear
  B)
   propanol and propionic acid
  done clear
  C)
   propene and isobutene
  done clear
  D)
   isopropanol and propanol
  done clear
  View Answer play_arrow

• question_answer86) The product of reaction between aniline and acetic anhydride is
  A)
   o-aminoacetophenone
  done clear
  B)
   m-aminoacetophenone
  done clear
  C)
   p-aminoacetophenone
  done clear
  D)
   acetanilide
  done clear
  View Answer play_arrow

• question_answer87) According to Le-Chateliers principle, the equilibrium constant of a reversible reaction will not shift by
  A)
   increasing the temperature of an exothermic reaction
  done clear
  B)
   increasing the temperature of an endothermic reaction
  done clear
  C)
   changing the concentrations of the reactants
  done clear
  D)
   the effect of a catalyst
  done clear
  View Answer play_arrow

• question_answer88) Properties of elements are periodic function of number of...... present in the nucleus.
  A)
   protons         
  done clear
  B)
   electrons
  done clear
  C)
   neutrons        
  done clear
  D)
   mesons
  done clear
  View Answer play_arrow

• question_answer89) The complex\[{{[Co{{(N{{H}_{3}})}_{5}}Br]}^{2+}}SO_{4}^{2-}\]and\[{{[Co{{(N{{H}_{3}})}_{5}}S{{O}_{4}}]}^{+}}B{{r}^{-}}\]are
  A)
   coordination isomers
  done clear
  B)
   linkage isomers
  done clear
  C)
   stereoisomers
  done clear
  D)
   ionisation isomers
  done clear
  View Answer play_arrow

• question_answer90) Maximum number of electrons in a shell with principal quantum number n is given by
  A)
   \[n\]              
  done clear
  B)
  \[2n\]
  done clear
  C)
   \[{{n}^{2}}\]             
  done clear
  D)
  \[2{{n}^{2}}\]
  done clear
  View Answer play_arrow

• question_answer91) Anti-Markownikoff addition of\[HBr\]is not observed in
  A)
   propene         
  done clear
  B)
   butene
  done clear
  C)
   2-butene        
  done clear
  D)
   2-pentene
  done clear
  View Answer play_arrow

• question_answer92) A ketone gives a yellow ppt when treated with 12 in an alkaline solution. Thus, the ketone is
  A)
   a cyclic ketone
  done clear
  B)
   a methyl ketone
  done clear
  C)
   an unsaturated ketone
  done clear
  D)
   None of the above
  done clear
  View Answer play_arrow

• question_answer93) Wroughtiron contains
  A)
   Cr              
  done clear
  B)
   Cu
  done clear
  C)
   C               
  done clear
  D)
   Ag
  done clear
  View Answer play_arrow

• question_answer94) The ore magnetite is
  A)
   \[F{{e}_{3}}{{O}_{4}}\]         
  done clear
  B)
   \[ZnC{{O}_{3}}\]
  done clear
  C)
   \[CuC{{O}_{3}}-Cu{{(OH)}_{2}}\]
  done clear
  D)
   \[Fe{{S}_{2}}\]
  done clear
  View Answer play_arrow

• question_answer95) The first step in the extraction of Cu from copper pyrites is
  A)
   reduction by carbon
  done clear
  B)
   electrolysis of ore
  done clear
  C)
   roasting of ore in\[{{O}_{2}}\]
  done clear
  D)
   magnetic separation
  done clear
  View Answer play_arrow

• question_answer96) Desalination of sea water can be done by
  A)
   osmosis
  done clear
  B)
   reverse osmosis
  done clear
  C)
   filtration
  done clear
  D)
   diffusion
  done clear
  View Answer play_arrow

• question_answer97) A compound with nitro group was reduced by \[Sn/HCl,\]followed by treatment with \[NaN{{O}_{2}}/HCl\]and followed by phenol. The chromophore group in the final compound is
  A)
   \[N{{O}_{2}}\]group      
  done clear
  B)
  \[N{{H}_{2}}\]group
  done clear
  C)
   azo group      
  done clear
  D)
   OH group
  done clear
  View Answer play_arrow

• question_answer98) Certain  reactions  follow the  relation between concentrations of the reactant vs time as What is the expected order for such reactions?
  A)
   0                 
  done clear
  B)
   1
  done clear
  C)
   2                  
  done clear
  D)
   Infinity
  done clear
  View Answer play_arrow

• question_answer99) A first order reaction has a rate constant\[k=3.01\times {{10}^{-3}}/s\]. How long it will take to decompose half of the reaction?
  A)
   2.303 s         
  done clear
  B)
   23.03 s
  done clear
  C)
   230.23 s        
  done clear
  D)
   2303 s
  done clear
  View Answer play_arrow

• question_answer100) The shape of the ammonia molecule is
  A)
   tetrahedral
  done clear
  B)
   trigonal pyramidal
  done clear
  C)
   trigonal bipyramid
  done clear
  D)
   trigonal planar
  done clear
  View Answer play_arrow

• question_answer101) \[{{H}_{5}}I{{O}_{6}}\]is a
  A)
   strong reducing agent
  done clear
  B)
   strong base
  done clear
  C)
   strong oxidising agent
  done clear
  D)
   weak base
  done clear
  View Answer play_arrow

• question_answer102) If a compound gives an orange or red precipitate with 2,4-dinitrophenylhydrazine, then the compound is
  A)
   an alkyl halide
  done clear
  B)
   an aryl halide
  done clear
  C)
   an amine
  done clear
  D)
   a carbonyl compound
  done clear
  View Answer play_arrow

• question_answer103) Isotones have
  A)
   same neutron number but different proton number
  done clear
  B)
   same proton number but different neutron number
  done clear
  C)
   same proton and neutron number
  done clear
  D)
   same proton but different electron number
  done clear
  View Answer play_arrow

• question_answer104) \[{{(C{{H}_{3}})}_{3}}C-OH\]on treatment with\[NaCl\]in aqueous medium gives
  A)
   no reaction      
  done clear
  B)
  \[{{(C{{H}_{3}})}_{3}}{{C}^{-}}N{{a}^{+}}\]
  done clear
  C)
   \[{{(C{{H}_{3}})}_{3}}CC{{l}^{-}}\]     
  done clear
  D)
   isobutylene
  done clear
  View Answer play_arrow

• question_answer105) The de-Broglie wavelength of a particle is
  A)
   proportional to its mass
  done clear
  B)
   proportional to its velocity
  done clear
  C)
   inversely proportional to its momentum
  done clear
  D)
   proportional to its total energy
  done clear
  View Answer play_arrow

• question_answer106) The\[C-H\]bond distance is the longest in
  A)
   \[{{C}_{2}}{{H}_{2}}\]           
  done clear
  B)
   \[{{C}_{2}}{{H}_{4}}\]
  done clear
  C)
   \[{{C}_{2}}He\]           
  done clear
  D)
   \[{{C}_{2}}{{H}_{2}}B{{r}_{2}}\]
  done clear
  View Answer play_arrow

• question_answer107) Dimension of universal gas constant (R) is
  A)
   \[[VP{{T}^{-1}}{{n}^{-1}}]\]
  done clear
  B)
   \[[V{{P}^{-1}}T{{n}^{-1}}]\]
  done clear
  C)
   \[[VPT{{n}^{-1}}]\]
  done clear
  D)
   \[[VP{{T}^{-1}}n]\]
  done clear
  View Answer play_arrow

• question_answer108) Entropy of a perfectly crystalline solid at\[0\text{ }K\]is
  A)
   positive
  done clear
  B)
   negative
  done clear
  C)
   zero
  done clear
  D)
   either positive or negative
  done clear
  View Answer play_arrow

• question_answer109) The hybridisation of carbon in molecular\[C{{O}_{2}}\] is
  A)
   \[sp\]              
  done clear
  B)
   \[s{{p}^{2}}\]
  done clear
  C)
   \[s{{p}^{3}}\]             
  done clear
  D)
   \[s{{p}^{3}}d\]
  done clear
  View Answer play_arrow

• question_answer110) \[CC{{l}_{4}}\]and freons
  A)
   are green compounds because they are green coloured
  done clear
  B)
   deplete ozone
  done clear
  C)
   cause increase in ozone concentration
  done clear
  D)
   have no effect on ozone concentration
  done clear
  View Answer play_arrow

• question_answer111) Total number of metal atoms per unit cell in a face-centred cubic lattice is
  A)
   14              
  done clear
  B)
   8
  done clear
  C)
   6               
  done clear
  D)
   4
  done clear
  View Answer play_arrow

• question_answer112) Bakelite is formed by polymerization between
  A)
   acrylonitrile molecules
  done clear
  B)
   tetrafluoroethene molecules
  done clear
  C)
   urea and formaldehyde molecules
  done clear
  D)
   phenol and formaldehyde molecules
  done clear
  View Answer play_arrow

• question_answer113) Chromatographic analysis is done based on the property of
  A)
   diffusion        
  done clear
  B)
   absorption
  done clear
  C)
   adsorption       
  done clear
  D)
   condensation
  done clear
  View Answer play_arrow

• question_answer114) Avogadro number\[(6.023\times {{10}^{23}})\]of carbon atoms are present in
  A)
   12 g of\[^{12}C{{O}_{2}}\]
  done clear
  B)
   22.4 L\[^{12}C{{O}_{2}}\]at room temperature
  done clear
  C)
   44 g of \[^{12}C{{O}_{2}}\]
  done clear
  D)
   12 moles of \[^{12}C{{O}_{2}}\]
  done clear
  View Answer play_arrow

• question_answer115) Glucose can be converted into ethyl alcohol using
  A)
   invertase        
  done clear
  B)
   zymase
  done clear
  C)
   maltase          
  done clear
  D)
   diastase
  done clear
  View Answer play_arrow

• question_answer116) When\[FeC{{l}_{3}}\]is added to phenol
  A)
   no reaction occurs
  done clear
  B)
   a coloured complex will be formed
  done clear
  C)
  \[F{{e}^{3+}}\]will be oxidised to higher state
  done clear
  D)
   o-chlorophenol will be formed
  done clear
  View Answer play_arrow

• question_answer117) The correct order of decreasing Lewis acidity is
  A)
   \[B{{F}_{3}}>BC{{l}_{3}}>BB{{r}_{3}}>B{{I}_{3}}\]
  done clear
  B)
   \[B{{I}_{3}}>BC{{l}_{3}}>BB{{r}_{3}}>B{{F}_{3}}\]
  done clear
  C)
   \[B{{I}_{3}}>BB{{r}_{3}}>BC{{l}_{3}}>B{{F}_{3}}\]
  done clear
  D)
   \[BC{{l}_{3}}>B{{F}_{3}}>BB{{r}_{3}}>B{{I}_{3}}\]
  done clear
  View Answer play_arrow

• question_answer118) The buffer present in blood plasma is
  A)
   borax, sodium hydroxide
  done clear
  B)
   carbonic acid, bicarbonate ion
  done clear
  C)
   acetic acid, sodium acetate
  done clear
  D)
   citric   acid,   potassium   dihydrogen phosphate
  done clear
  View Answer play_arrow

• question_answer119) Conduction in a p-type semiconductor is increased by
  A)
   increasing the band gap
  done clear
  B)
   decreasing the temperature
  done clear
  C)
   adding appropriate electron deficient impurities
  done clear
  D)
   adding   appropriate   electron   rich impurities
  done clear
  View Answer play_arrow

• question_answer120) The volume of\[0.1\text{ }M\text{ }Ca{{(OH)}_{2}}\]required to neutralise 10 mL of\[0.1\text{ }N\text{ }HCl\]is
  A)
   10 mL          
  done clear
  B)
   20 mL
  done clear
  C)
   5 mL           
  done clear
  D)
   15 mL
  done clear
  View Answer play_arrow

• question_answer121) Boron is unable to form\[BF_{6}^{3-}\]because of
  A)
   high electronegativity of boron
  done clear
  B)
   high electronegativity of fluorine
  done clear
  C)
   lack of d-orbitals in boron
  done clear
  D)
   less  difference  in  electronegativity between B and F
  done clear
  View Answer play_arrow

• question_answer122) The rate of reactions exhibiting negative activation energy
  A)
   decreases with increasing temperature
  done clear
  B)
   increases with increasing temperature
  done clear
  C)
   does not depend on temperature
  done clear
  D)
   depends on the height of the potential barrier
  done clear
  View Answer play_arrow

• question_answer123) Addition of a non-volatile solute in a volatile ideal solvent
  A)
   increases the vapour pressure of the solvent
  done clear
  B)
   decreases the vapour pressure of the solvent
  done clear
  C)
   decreases the boiling point of the solvent
  done clear
  D)
   increases the freezing point of the solvent
  done clear
  View Answer play_arrow

• question_answer124) The dissolution of a gas in a liquid is governed by
  A)
   Raoults law
  done clear
  B)
   Henrys law
  done clear
  C)
   Daltons law of partial pressure
  done clear
  D)
   vant Hoff factor
  done clear
  View Answer play_arrow

• question_answer125) Normal human blood sugar range is 65-105 mg/dL. Considering density of human blood is 1.06 kg/L, if a patients sugar level reads 720 ppm, his/her blood sugar at that time is
  A)
   normal         
  done clear
  B)
   high
  done clear
  C)
   low            
  done clear
  D)
   cannot say
  done clear
  View Answer play_arrow

• question_answer126) pH of 0.0002 M formic acid\[[{{K}_{a}}=2\times {{10}^{-4}}]\] approximately is
  A)
   1.35             
  done clear
  B)
   0.5
  done clear
  C)
   3.7               
  done clear
  D)
   1.85
  done clear
  View Answer play_arrow

• question_answer127) At room temperature, for the reaction \[N{{H}_{4}}SH(s)N{{H}_{3}}(g)+{{H}_{2}}S(g)\]
  A)
   \[{{K}_{p}}={{K}_{c}}\]
  done clear
  B)
   \[{{K}_{p}}>{{K}_{c}}\]
  done clear
  C)
   \[{{K}_{p}}<{{K}_{c}}\]
  done clear
  D)
  \[{{K}_{p}}\]and\[{{K}_{c}}\]do not relate
  done clear
  View Answer play_arrow

• question_answer128) The molecule NO is
  A)
   paramagnetic
  done clear
  B)
   diamagnetic
  done clear
  C)
   ferromagnetic
  done clear
  D)
   an even electron molecule
  done clear
  View Answer play_arrow

• question_answer129) The most stable oxidation state exhibited by thallium is
  A)
   0               
  done clear
  B)
   +1
  done clear
  C)
   +2              
  done clear
  D)
   +3
  done clear
  View Answer play_arrow

• question_answer130) Which of the following elements has the highest value of electron affinity?
  A)
   \[O\]               
  done clear
  B)
   S
  done clear
  C)
   Se              
  done clear
  D)
   Te
  done clear
  View Answer play_arrow

• question_answer131) The correct order of electron gain enthalpy \[({{\Delta }_{eg}}H)\]of the halogen atoms is
  A)
   \[F<Cl<Br<I\]   
  done clear
  B)
   \[Cl<F<Br<I\]
  done clear
  C)
   \[KBr<Cl<F\]   
  done clear
  D)
  \[Cl<Br<I<F\]
  done clear
  View Answer play_arrow

• question_answer132) Which of the following statements is correct?
  A)
   The equivalent mass of\[KMn{{O}_{4}}\]in alkaline medium is molar mass divided by five.
  done clear
  B)
   The equivalent mass of\[KMn{{O}_{4}}\]in strongly alkaline medium is molar mass divided by three.
  done clear
  C)
   The equivalent mass of\[KMn{{O}_{4}}\]in neutral medium is molar mass divided by three.
  done clear
  D)
   The equivalent mass of\[KMn{{O}_{4}}\]in weakly acidic medium is molar mass divided by three.
  done clear
  View Answer play_arrow

• question_answer133) Bohr model of hydrogen atom was unable to explain
  A)
   Rydbergs formula of atomic spectra
  done clear
  B)
   Heisenbergs uncertainty principle
  done clear
  C)
   Plancks law of energy quantisation
  done clear
  D)
   Rutherfords model of atomic structure
  done clear
  View Answer play_arrow

• question_answer134) The correct order of bond energy is
  A)
   \[C{{l}_{2}}>B{{r}_{2}}>{{F}_{2}}>{{I}_{2}}\]
  done clear
  B)
   \[C{{l}_{2}}>{{F}_{2}}>B{{r}_{2}}>{{I}_{2}}\]
  done clear
  C)
   \[{{I}_{2}}>B{{r}_{2}}>C{{l}_{2}}>{{F}_{2}}\]
  done clear
  D)
   \[{{I}_{2}}>B{{r}_{2}}>{{F}_{2}}>C{{l}_{2}}\]
  done clear
  View Answer play_arrow

• question_answer135) The correct order of increasing oxidizing power in the series is
  A)
   \[VO_{2}^{+}<C{{r}_{2}}O_{7}^{2-}<MnO_{4}^{-}\]
  done clear
  B)
   \[C{{r}_{2}}O_{7}^{2-}<VO_{2}^{+}<MnO_{4}^{-}\]
  done clear
  C)
   \[C{{r}_{2}}O_{7}^{2-}<MnO_{4}^{-}>VO_{2}^{+}\]
  done clear
  D)
   \[MnO_{4}^{-}<C{{r}_{2}}O_{7}^{2-}<VO_{2}^{+}\]
  done clear
  View Answer play_arrow

• question_answer136) Paramagnetism is shown by
  A)
   \[{{N}_{2}}\]            
  done clear
  B)
   \[{{O}_{2}}\]
  done clear
  C)
   \[{{F}_{2}}\]             
  done clear
  D)
   \[C{{O}_{2}}\]
  done clear
  View Answer play_arrow

• question_answer137) The spin only magnetic moment of \[{{[Cr{{F}_{6}}]}^{4-}}\](at. no. for Cr is 24) is
  A)
   0              
  done clear
  B)
   1.73 BM
  done clear
  C)
   2.83BM        
  done clear
  D)
   4.9BM
  done clear
  View Answer play_arrow

• question_answer138) The reduction of zinc oxide with coke occurs at temperature
  A)
   greater than that for\[CuO\]
  done clear
  B)
   less than that for \[CuO\]
  done clear
  C)
   less than that for\[A{{g}_{2}}O\]
  done clear
  D)
   equal to that for \[CuO\]
  done clear
  View Answer play_arrow

• question_answer139) The effective atomic number for \[{{[Rh{{({{H}_{2}}O)}_{6}}]}^{3+}}\] (at. no. for Rh is 45) is
  A)
   42             
  done clear
  B)
   45
  done clear
  C)
   48             
  done clear
  D)
   54
  done clear
  View Answer play_arrow

• question_answer140) The crystal structure of solid Mn (II) oxide is
  A)
  \[NaCl\]structure
  done clear
  B)
  \[F{{e}_{2}}{{O}_{3}}\]structure
  done clear
  C)
  \[Ca{{F}_{2}}\]structure
  done clear
  D)
  \[N{{a}_{2}}O\]structure
  done clear
  View Answer play_arrow

• question_answer141) The nitration (using nitration mixture) of aniline gives
  A)
   p-nitroaniline
  done clear
  B)
   o-nitroaniline
  done clear
  C)
   m-nitroaniline
  done clear
  D)
   All of these
  done clear
  View Answer play_arrow

• question_answer142) The order of basic strength for methyl substituted amine in aqueous solution is
  A)
   \[N{{(C{{H}_{3}})}_{3}}>N{{(C{{H}_{3}})}_{2}}H>N(C{{H}_{3}}){{H}_{2}}\] \[>N{{H}_{3}}\]
  done clear
  B)
   \[N(C{{H}_{3}}){{H}_{2}}>N{{(C{{H}_{3}})}_{2}}H>N{{(C{{H}_{3}})}_{3}}\] \[>N{{H}_{3}}\]
  done clear
  C)
  \[N{{H}_{3}}_{2}>N(C{{H}_{3}}){{H}_{2}}>N{{(C{{H}_{3}})}_{2}}H\] \[>N{{(C{{H}_{3}})}_{3}}\]
  done clear
  D)
   \[N{{(C{{H}_{3}})}_{2}}H>N(C{{H}_{3}}){{H}_{2}}>N{{(C{{H}_{3}})}_{3}}\]\[>N{{H}_{3}}\]
  done clear
  View Answer play_arrow

• question_answer143) The strongest acid among the choices is
  A)
   dichloroacetic acid
  done clear
  B)
   dimethylacetic acid
  done clear
  C)
   trifluoroacetic acid
  done clear
  D)
   triiodoacetic acid
  done clear
  View Answer play_arrow

• question_answer144) Glucose and fructose can be distinguished by
  A)
   Lucas test
  done clear
  B)
   Ninhydrin test
  done clear
  C)
   Benedict reagent test
  done clear
  D)
   All of the above
  done clear
  View Answer play_arrow

• question_answer145) Which is the most stable compound among the following?
  A)
   
  done clear
  B)
   
  done clear
  C)
   
  done clear
  D)
   All the compounds have same stability
  done clear
  View Answer play_arrow

• question_answer146) Among the following, which is the least stable conformation of cyclohexane?
  A)
   Boat conformation
  done clear
  B)
   Half chair conformation
  done clear
  C)
   Twist boat conformation
  done clear
  D)
   Chair conformation
  done clear
  View Answer play_arrow

• question_answer147) The correct relation between the following pair of compounds is
  A)
   constitutional isomers
  done clear
  B)
   enantiomers
  done clear
  C)
   diastereomers
  done clear
  D)
   None of the above
  done clear
  View Answer play_arrow

• question_answer148) Among the choices of alkyl bromide, the least reactive bromide in a\[{{S}_{N}}2\]reaction is
  A)
   1-bromopentane
  done clear
  B)
   2-bromo-2-methylbutane
  done clear
  C)
   1-bromo-3-methylbutane
  done clear
  D)
   1-bromo-2-methylbutane
  done clear
  View Answer play_arrow

• question_answer149) The correct order of leaving group ability in a nucleophilic substitution reaction is
  A)
   \[B{{r}^{-}}>C{{l}^{-}}>C{{H}_{3}}CO_{2}^{-}>H{{O}^{-}}>{{H}^{-}}\]
  done clear
  B)
   \[{{H}^{-}}>O{{H}^{-}}>C{{H}_{3}}C{{O}_{2}}>C{{l}^{-}}>B{{r}^{-}}\]
  done clear
  C)
   \[B{{r}^{-}}>C{{H}_{3}}C{{O}_{2}}>CF>O{{H}^{-}}>{{H}^{-}}\]
  done clear
  D)
   \[C{{H}_{3}}C{{O}_{2}}>B{{r}^{-}}>C{{l}^{-}}>O{{H}^{-}}>{{H}^{-}}\]
  done clear
  View Answer play_arrow

• question_answer150) 2-bromobutane reacts with\[O{{H}^{-}}\]in\[{{H}_{2}}O\]to give 2-butanol. The reaction involves
  A)
   retention in configuration
  done clear
  B)
   inversion in configuration
  done clear
  C)
   racemization
  done clear
  D)
   mutarotation
  done clear
  View Answer play_arrow

• question_answer151) The plane of cell wall formation in a dividing cell is determined by
  A)
   Golgi apparatus
  done clear
  B)
   Microfilaments
  done clear
  C)
   microtubules
  done clear
  D)
   endoplasmic reticulum
  done clear
  View Answer play_arrow

• question_answer152) From the following, select the statement that is true.
  A)
   All cells have a cell wall
  done clear
  B)
   Animals cells contain microtubules but plant cells do not contain microtubules
  done clear
  C)
   The Golgi apparatus is found only in animal cells
  done clear
  D)
   Chloroplasts are found in plant cells but not in prokaryotic or animal cells
  done clear
  View Answer play_arrow

• question_answer153) The volume of air which remains in the conducting airways and is not available for gas exchange is called
  A)
   vital capacity
  done clear
  B)
   functional residual capacity
  done clear
  C)
   forced expiratory volume
  done clear
  D)
   anatomic dead space
  done clear
  View Answer play_arrow

• question_answer154) The Darwinian fitness of an organism is a measure of
  A)
   its ability, relative to others in the population to pass its genes to the next generation
  done clear
  B)
   the number of offspring it produces
  done clear
  C)
   its lifespan
  done clear
  D)
   its physical vigour
  done clear
  View Answer play_arrow

• question_answer155) A potential danger to a population that has been greatly reduced in number is the
  A)
   Hardy-Weinberg disequilibrium
  done clear
  B)
   tendency towards assortative mating
  done clear
  C)
   reduced gene flow
  done clear
  D)
   loss of genetic variability
  done clear
  View Answer play_arrow

• question_answer156) An isolated population of humans with approximately equal numbers of blue-eyed and brown-eyed individuals was decimated by an earthquake. Only a few brown-eyed people remained to form the next generation. This kind of change in the gene pool is called a
  A)
   Hardy-Weinberg equilibrium
  done clear
  B)
   blocked gene flow
  done clear
  C)
   bottleneck effect
  done clear
  D)
   founder effect
  done clear
  View Answer play_arrow

• question_answer157) The syndrome in humans in which individuals somatic cells contain the three sex chromosomes XXY is called
  A)
   Klinefelters syndrome
  done clear
  B)
   Turners syndrome
  done clear
  C)
   Downs syndrome
  done clear
  D)
   Superfemale
  done clear
  View Answer play_arrow

• question_answer158) How does vaccination work?
  A)
   The immune system produces antibodies, which stay in the blood
  done clear
  B)
   Memory lymphocytes are produced. They remain in the body to fight off any future infection with the live pathogen
  done clear
  C)
   The dead pathogen stays in the body and constantly stimulates the immune system
  done clear
  D)
   All of the above
  done clear
  View Answer play_arrow

• question_answer159) The number of autosomes in a normal human cell is
  A)
   44              
  done clear
  B)
   45
  done clear
  C)
   46              
  done clear
  D)
   48
  done clear
  View Answer play_arrow

• question_answer160) Downs syndrome is associated with trisomy of chromosome number
  A)
   20             
  done clear
  B)
   21
  done clear
  C)
   22             
  done clear
  D)
   23
  done clear
  View Answer play_arrow

• question_answer161) Which of the following is the site of translation of the mRNA?
  A)
   Nucleus         
  done clear
  B)
   Nucleolus
  done clear
  C)
   Golgi body      
  done clear
  D)
   Ribosomes
  done clear
  View Answer play_arrow

• question_answer162) Okazaki fragments are formed during
  A)
   transcription
  done clear
  B)
   translation
  done clear
  C)
   reverse transcription
  done clear
  D)
   DNA replication
  done clear
  View Answer play_arrow

• question_answer163) Human proteins can be produced in the milk or semen of farm animals. True or false.
  A)
   True
  done clear
  B)
   False, proteins cannot be produced in milk.
  done clear
  C)
   False, proteins cannot be produced in semen
  done clear
  D)
   False, animals are not used for protein production
  done clear
  View Answer play_arrow

• question_answer164) In a genetic engineering experiment, restriction enzymes can be used for
  A)
   bacterial DNA only
  done clear
  B)
   viral DNA only
  done clear
  C)
   any DNA fragment
  done clear
  D)
   eukaryotic DNA only
  done clear
  View Answer play_arrow

• question_answer165) Which of the following is used to select genes of interest from a genomic library?
  A)
   Restriction enzymes
  done clear
  B)
   Cloning vectors
  done clear
  C)
   Gene targets
  done clear
  D)
   DNA probes
  done clear
  View Answer play_arrow

• question_answer166) Sporopollenin, an organic material is present in
  A)
   stigma           
  done clear
  B)
   style
  done clear
  C)
   exine            
  done clear
  D)
   intine
  done clear
  View Answer play_arrow

• question_answer167) In general, pollen tube enters the ovule through
  A)
   micropyle       
  done clear
  B)
   chalaza
  done clear
  C)
   hilum           
  done clear
  D)
   funicle
  done clear
  View Answer play_arrow

• question_answer168) Transfer of pollen grain from anther to stigma of another flower of the same plant is called as
  A)
   geitonogamy    
  done clear
  B)
   xenogamy
  done clear
  C)
   cleistogamy     
  done clear
  D)
   chasmogamy
  done clear
  View Answer play_arrow

• question_answer169) The endosperm cells in angiosperms are
  A)
   haploid          
  done clear
  B)
   diploid
  done clear
  C)
   triploid          
  done clear
  D)
   tetraploid
  done clear
  View Answer play_arrow

• question_answer170) The fleshy edible part of an apple is
  A)
   thalamus        
  done clear
  B)
   nucellus
  done clear
  C)
   ovary           
  done clear
  D)
   endosperm
  done clear
  View Answer play_arrow

• question_answer171) The portion of embryonal axis above cotyledon is called as
  A)
   epicotyl         
  done clear
  B)
   hypocotyl
  done clear
  C)
   coleoptile        
  done clear
  D)
   radicle
  done clear
  View Answer play_arrow

• question_answer172) Phenotypic and genotypic ratio is similar in case of
  A)
   complete dominance
  done clear
  B)
   incomplete dominance
  done clear
  C)
   over dominance
  done clear
  D)
   epistasis
  done clear
  View Answer play_arrow

• question_answer173) Which of the following is the number of alleles for blood group in an individual?
  A)
   1               
  done clear
  B)
   2
  done clear
  C)
   3               
  done clear
  D)
   4
  done clear
  View Answer play_arrow

• question_answer174) Cholesterol belongs to which of the following groups?
  A)
   Steroids       
  done clear
  B)
   Neutral fats
  done clear
  C)
   Waxes           
  done clear
  D)
   Phospholipids
  done clear
  View Answer play_arrow

• question_answer175) Which of the following occurs at the ribosomes?
  A)
   Most of a cells DNA molecules are stored there
  done clear
  B)
   Proteins are produced there
  done clear
  C)
   mRNAs are produced there
  done clear
  D)
   DNA replication takes place there
  done clear
  View Answer play_arrow

• question_answer176) Which of the following is the ultimate source of energy in an ecosystem?
  A)
   Sunlight        
  done clear
  B)
   Producers
  done clear
  C)
   Consumers      
  done clear
  D)
   Decomposers
  done clear
  View Answer play_arrow

• question_answer177) The interaction where one species is benefitted and the other is neither benefitted nor harmed is called as
  A)
   amensalism     
  done clear
  B)
   commensalism
  done clear
  C)
   mutualism       
  done clear
  D)
   predation
  done clear
  View Answer play_arrow

• question_answer178) The detritus food chain begins with
  A)
   primary producers
  done clear
  B)
   primary consumers
  done clear
  C)
   secondary consumers
  done clear
  D)
   dead organic matter
  done clear
  View Answer play_arrow

• question_answer179) The problem of electrical discontinuity caused in the normal heart by the connective tissue separating the atria from the ventricles is solved by
  A)
   coordinating electrical activity in the atria with electrical activity in the ventricles by connecting them via the boundle of His
  done clear
  B)
   having the AV node function as a secondary pacemaker
  done clear
  C)
   having an ectopic pacemaker
  done clear
  D)
   coordinating electrical activity in the atria with electrical activity in the ventricles by connecting them via the vagus nerve
  done clear
  View Answer play_arrow

• question_answer180) The protein whose removal enables myosin to bind actin in smooth muscle is
  A)
   tropomyosin
  done clear
  B)
   caldesmon
  done clear
  C)
   myosin light chain kinase
  done clear
  D)
   calmodulin
  done clear
  View Answer play_arrow

• question_answer181) An investigator places an isolated neuron in a calcium-free medium, gives the neuron a suprathreshold stimulus and then performs an assay to test whether neurotransmitter is released into the medium. Which of the following outcomes would you predict?
  A)
   No neurotransmitter is detected since influx of calcium into the synaptic knob is required for neurotransmitter release
  done clear
  B)
   No neurotransmitter is detected since influx of calcium is required in order for the neuron to conduct an action potential
  done clear
  C)
   Neurotransmitter is detected since calcium is not required for action potential conduction and the initial stimulus was suprathreshold
  done clear
  D)
   We cannot predict the outcome without knowing whether the neuron was myelinated
  done clear
  View Answer play_arrow

• question_answer182) What product of the immune system attaches to bacteria, making them easier to be eaten by white blood cells?
  A)
   Antigen         
  done clear
  B)
   Haemoglobin
  done clear
  C)
   Antibody       
  done clear
  D)
   MHC I molecule
  done clear
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• question_answer183) A patient with symptoms of allergies would have an elevation of which of the following?
  A)
   \[IgE\]             
  done clear
  B)
   White blood count
  done clear
  C)
   \[IgM\]            
  done clear
  D)
   \[IgD\]
  done clear
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• question_answer184) In anaphylactic shock, a substance is released which causes dilation of the blood vessels and capillary leaking. What is this substance called?
  A)
   Adrenaline      
  done clear
  B)
   Benadryl
  done clear
  C)
   Albumin         
  done clear
  D)
   Histamine
  done clear
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• question_answer185) Pear fruits are gritty due to the presence of
  A)
   tracheids         
  done clear
  B)
   vessels
  done clear
  C)
   fibres            
  done clear
  D)
   sclereids
  done clear
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• question_answer186) Which of the following growth hormones is associated with stomatal movements?
  A)
   Auxin          
  done clear
  B)
   Gibberellin
  done clear
  C)
   ABA            
  done clear
  D)
   Cytokinin
  done clear
  View Answer play_arrow

• question_answer187) Denitrification is carried out by
  A)
   Pseudomonas    
  done clear
  B)
   Nitrobacter
  done clear
  C)
   Nitrosomonas    
  done clear
  D)
   Nitrococcus
  done clear
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• question_answer188) Non-cyclic photophosphorylation results in the production of
  A)
   ADP           
  done clear
  B)
   ATP
  done clear
  C)
   NADPH           
  done clear
  D)
   ATP and NADPH
  done clear
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• question_answer189) The site of glycolysis is
  A)
   cytoplasm
  done clear
  B)
   chloroplast
  done clear
  C)
   mitochondrial matrix
  done clear
  D)
   mitochondrial inner membrane
  done clear
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• question_answer190) The two organisms which breathe only through their moist skin are
  A)
   fish and frog                         
  done clear
  B)
   frog and earthworm                  
  done clear
  C)
   leech and earthworm                
  done clear
  D)
   fish and earthworm                   
  done clear
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• question_answer191) The alpha helices and beta sheets are the example of which level of protein organization?
  A)
   Primary structure
  done clear
  B)
   Secondary structure
  done clear
  C)
   Tertiary structure
  done clear
  D)
   Quaternary structure
  done clear
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• question_answer192) Cervical cancer can be caused by
  A)
   Chlamydia sp.
  done clear
  B)
   Human papilloma virus
  done clear
  C)
   Herpes simplex virus
  done clear
  D)
   Neisseria gonorrhoeae
  done clear
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• question_answer193) In human females, the ovarian cycle begins when the
  A)
   levels of oestrogen reach their maximum
  done clear
  B)
   hypothalamus stimulates the anterior pituitary to increase its output of FSH and LH
  done clear
  C)
   level of progesterone drops precipitously
  done clear
  D)
   hypothalamus increases its release-of FSH and LH
  done clear
  View Answer play_arrow

• question_answer194) A vasectomy    
  A)
   prevents the production of sperm in the testes
  done clear
  B)
   prevents the production of semen
  done clear
  C)
   prevents the movement of sperm into the urethra
  done clear
  D)
   prevents a man from having an erection
  done clear
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• question_answer195) Sperm of animal species A cannot fertilize ovum of species B because
  A)
   fertilizin of A and antifertilizin of B are not compatible
  done clear
  B)
   antifertilizin of A and fertilizin of B are not compatible
  done clear
  C)
   fertilizin of A and B are not compatible
  done clear
  D)
   antifertilizin of A and B are not compatible
  done clear
  View Answer play_arrow

• question_answer196) The unit of evolution is now known to be the
  A)
   individual       
  done clear
  B)
   family
  done clear
  C)
   populaton       
  done clear
  D)
   species
  done clear
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• question_answer197) Trichoderma is an example of which of the following?
  A)
   Phycomycetes   
  done clear
  B)
   Zygomycetes
  done clear
  C)
   Deuteromycetes 
  done clear
  D)
   Basidiomycetes
  done clear
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• question_answer198) Lichen is an association between
  A)
   fungi and bryophyte
  done clear
  B)
   fungi and algae
  done clear
  C)
   algae and pteridophyte
  done clear
  D)
   algae and bacteria
  done clear
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• question_answer199) The genetic material of a viroid is
  A)
   DNA            
  done clear
  B)
   RNA
  done clear
  C)
   protein          
  done clear
  D)
   carbohydrate
  done clear
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• question_answer200) Mannitol is a stored food material found in members of which of the following classes?
  A)
   Chlorophyceae  
  done clear
  B)
   Xanthophyceae
  done clear
  C)
   Rhodophyceae   
  done clear
  D)
   Phaeophyceae
  done clear
  View Answer play_arrow

• question_answer201) The first stable product of\[{{C}_{4}}-\]pathway is
  A)
   OAA           
  done clear
  B)
   PGA
  done clear
  C)
   PGAL         
  done clear
  D)
   DHAP
  done clear
  View Answer play_arrow

• question_answer202) Energy equivalent of a NADH is which of the following numbers of ATP molecules?
  A)
   2              
  done clear
  B)
   3
  done clear
  C)
   38             
  done clear
  D)
   36
  done clear
  View Answer play_arrow

• question_answer203)  Internodal elongation is associated with
  A)
   auxin            
  done clear
  B)
   cytokinin
  done clear
  C)
   gibberellin       
  done clear
  D)
   ABA
  done clear
  View Answer play_arrow

• question_answer204) Which of the following is not a characteristic features of arthropods?
  A)
   Jointed appendages
  done clear
  B)
   Unsegmented body
  done clear
  C)
   Moulting
  done clear
  D)
   Articulated exoskeleton
  done clear
  View Answer play_arrow

• question_answer205) Obliquely placed ovary and swollen placenta is associated with which of the following families?              
  A)
   Asteraceae      
  done clear
  B)
   Solanaceae
  done clear
  C)
   Brassicaceae     
  done clear
  D)
   Malvaceae
  done clear
  View Answer play_arrow

• question_answer206) On the basis of position of the ovary, mustard plants are
  A)
   hypogynous     
  done clear
  B)
   perigynous
  done clear
  C)
   epigynous      
  done clear
  D)
   zygomorphic
  done clear
  View Answer play_arrow

• question_answer207) The flower of Calotropis has which of the following aestivations?
  A)
   Twisted         
  done clear
  B)
   Imbricate
  done clear
  C)
   Valvate          
  done clear
  D)
   Vexillary
  done clear
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• question_answer208) The population limited to a particular geographic area is called as
  A)
   pandemic       
  done clear
  B)
   endemic
  done clear
  C)
   alien            
  done clear
  D)
   natural
  done clear
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• question_answer209) Which of the following has the largest population in a food chain?
  A)
   Producers
  done clear
  B)
   Primary consumers
  done clear
  C)
   Secondary consumers
  done clear
  D)
   Decomposers
  done clear
  View Answer play_arrow

• question_answer210) The second trophic level of longer food chains in a lake is
  A)
   phytoplankton   
  done clear
  B)
   zooplankton
  done clear
  C)
   benthos       
  done clear
  D)
   fishes
  done clear
  View Answer play_arrow

• question_answer211) The vertical distribution of different species occupying different levels is called as
  A)
   stratification     
  done clear
  B)
   fragmentation
  done clear
  C)
   mobilization     
  done clear
  D)
   mineralization
  done clear
  View Answer play_arrow

• question_answer212) Widal test is specific for the diagnosis of which of the following diseases?
  A)
   Typhoid        
  done clear
  B)
   Malaria
  done clear
  C)
   Pneumonia      
  done clear
  D)
   Common cold
  done clear
  View Answer play_arrow

• question_answer213) Antibodies resemble which of the following shape?             
  A)
   X               
  done clear
  B)
   Y
  done clear
  C)
   Z               
  done clear
  D)
   O
  done clear
  View Answer play_arrow

• question_answer214) AIDS is caused by a
  A)
   retrovirus        
  done clear
  B)
   DNA virus
  done clear
  C)
   viroid            
  done clear
  D)
   protein
  done clear
  View Answer play_arrow

• question_answer215) Which of the following belongs to the class- Gastropoda?
  A)
   Clam            
  done clear
  B)
   Cuttle fish
  done clear
  C)
   Snail            
  done clear
  D)
   Mussel
  done clear
  View Answer play_arrow

• question_answer216) The blood-brain barrier
  A)
   consists of  both  anatomical  and physiological factors
  done clear
  B)
   regulates to some extent the passage of substances from the blood to the interstitial fluid of the brain
  done clear
  C)
   is anatomically related to the formation of tight junctions between adjacent capillary endothelial cells
  done clear
  D)
   All of the above are correct
  done clear
  View Answer play_arrow

• question_answer217) The stages between larval moults in an insects are called
  A)
   pupae           
  done clear
  B)
   instars
  done clear
  C)
   grubs            
  done clear
  D)
   caterpillars
  done clear
  View Answer play_arrow

• question_answer218) Which of the following animals is a reptile?
  A)
   Salamander     
  done clear
  B)
   Toad
  done clear
  C)
   Newt           
  done clear
  D)
   Turtle
  done clear
  View Answer play_arrow

• question_answer219) The secretion of tears, milk, sweat and oil are functions of which of the following tissues?
  A)
   Epithelial
  done clear
  B)
   Nervous
  done clear
  C)
   Loose connective
  done clear
  D)
   Lymphoid
  done clear
  View Answer play_arrow

• question_answer220) Collagen fibers are characteristic of which tissue?
  A)
   Muscle
  done clear
  B)
   Epithelial
  done clear
  C)
   Connective
  done clear
  D)
   Nervous
  done clear
  View Answer play_arrow

• question_answer221) Cortisol is secreted by the adrenal cortex in response to stress. In addition to its function in a stress response, it functions in negative feedback by
  A)
   inhibiting the hypothalamus so that Corticotropin Releasing Hormone (CRH) secretion is reduced
  done clear
  B)
   inhibiting the anterior pituitars ability to respond to CRH by reducing the pituitarys sensitivity to CRH
  done clear
  C)
   Both (a) and (b)
  done clear
  D)
   None of the above
  done clear
  View Answer play_arrow

• question_answer222) Why asexual reproduction is sometimes disadvantageous?
  A)
   It allows animals that do not move around to produce offspring without finding mates
  done clear
  B)
   It allows an animal to produce many offspring quickly
  done clear
  C)
   It saves the time and energy of gamete production
  done clear
  D)
   It   produces genetically uniform populations
  done clear
  View Answer play_arrow

• question_answer223) Which of the following is responsible for nourishing the developing sperm?
  A)
   Sertoli cells
  done clear
  B)
   Leydig cells
  done clear
  C)
   Granulosa cells
  done clear
  D)
   Corpus luteum
  done clear
  View Answer play_arrow

• question_answer224) What is the site of fertilization in mammals?
  A)
   Cervix
  done clear
  B)
   Uterus
  done clear
  C)
   Vagina
  done clear
  D)
   Fallopian tubes
  done clear
  View Answer play_arrow

• question_answer225) Surfactant
  A)
   is a protein produced by type II alveolar cells
  done clear
  B)
   is excessive in many premature infants resulting in difficulties in breathing
  done clear
  C)
   Decreases the surface tension of the fluid lining the alveoli
  done clear
  D)
   is lacking in individuals suffering from acute respiratory distress syndrome
  done clear
  View Answer play_arrow