Solved papers for AMU Medical AMU Solved Paper-1996

done AMU Solved Paper-1996 Total Questions - 200

• question_answer1) A block of mass m is released from the position A and moves   on   a frictionless surface as shown. The kinetic energies at positions B, C and D are\[{{K}_{B}},{{K}_{C}}\]and\[{{K}_{D}}\]respectively. Pick out the wrong statement from the following
  A)
   \[{{K}_{B}}=2{{K}_{C}}\]
  done clear
  B)
   \[{{K}_{D}}=10\,mg\]
  done clear
  C)
   \[{{K}_{B}}+{{K}_{C}}={{K}_{D}}\]
  done clear
  D)
  \[({{K}_{B}}+{{K}_{C}})<{{K}_{D}}\]
  done clear
  View Answer play_arrow

• question_answer2) Particle A makes a perfectly elastic collision with another particle B at rest. They fly apart in opposite directions with equal -velocities. The ratio of their masses\[{{m}_{A}}/{{m}_{B}}\]is
  A)
   1/2                
  done clear
  B)
   1/3
  done clear
  C)
   1/4                
  done clear
  D)
   1/5
  done clear
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• question_answer3) A homogeneous chain of length L lies on a table. If the coefficient of friction is\[\mu \], the maximum length of the chain that can hang over the table is
  A)
   \[\frac{\mu L}{1-\mu }\]
  done clear
  B)
   \[\frac{\mu L}{1+\mu }\]
  done clear
  C)
   \[\frac{L}{\mu }\]
  done clear
  D)
   \[\frac{L}{1+\mu }\]
  done clear
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• question_answer4) A body of mass 10 kg is lying on a rough plane inclined at an angle of\[30{}^\circ \]to the horizontal and the coefficient of friction is 0.5. The minimum force required to pull the body up the plane is
  A)
   0.914 N          
  done clear
  B)
   9.14 N
  done clear
  C)
   91.4 N           
  done clear
  D)
   914 N
  done clear
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• question_answer5) A stuntman plans to run across a rooftop and then horizontally off it to land on the roof of the next building. The roof of the next building is 4.9 m below the first one and 6.2 m away from it. What should be his minimum speed, in m/s, so that he can successfully make the jump
  A)
   3.1               
  done clear
  B)
   4.1
  done clear
  C)
   4.9              
  done clear
  D)
   6.2,
  done clear
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• question_answer6) Two forces of magnitudes 8 N and 15 N respectively act at a point so as to make the resultant force of 17 N. The angle between the forces has to be
  A)
   \[45{}^\circ \]              
  done clear
  B)
   \[60{}^\circ \]
  done clear
  C)
   \[90{}^\circ \]             
  done clear
  D)
   \[120{}^\circ \]
  done clear
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• question_answer7) A body of mass 100 g is sliding from an inclined plane of inclination\[30{}^\circ \]. What is the frictional force experienced if\[\mu =0.7\]?
  A)
   \[0.7\times \sqrt{2}\times \frac{1}{\sqrt{3}}N\]
  done clear
  B)
   \[0.7\times \sqrt{3}\times \frac{1}{2}N\]
  done clear
  C)
   \[0.7\times \sqrt{3}N\]
  done clear
  D)
   \[0.7\times 2\times \frac{1}{\sqrt{3}}N\]
  done clear
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• question_answer8) A ball is thrown up, it reaches a maximum height and then comes down. If \[{{t}_{1}}\]and \[({{t}_{2}}>{{t}_{1}})\]are the times that the ball takes to be at a particular height then the time taken by the ball to reach the highest point is
  A)
   \[{{t}_{1}}+{{t}_{2}}\]
  done clear
  B)
   \[{{t}_{2}}-{{t}_{1}}\]
  done clear
  C)
   \[\frac{{{t}_{2}}-{{t}_{1}}}{2}\]
  done clear
  D)
   \[\frac{{{t}_{1}}+{{t}_{2}}}{2}\]
  done clear
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• question_answer9) Which of the following graphs can possibly represent a one-dimensional motion?
  A)
   I                   
  done clear
  B)
   II
  done clear
  C)
   III                 
  done clear
  D)
   IV
  done clear
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• question_answer10) The radiation emitted per unit time by unit area of a black body at temperature \[T\]is \[\sigma {{T}^{4}}\] where a is the Stefan-Boltzmann constant. The constant\[\sigma \]can also be expressed in terms of Boltmanns constant (k). Plancks constant (h) and speed of light  as\[\sigma =A{{k}^{a}}{{h}^{\beta }}{{c}^{\gamma }},\]where \[A,\alpha ,\beta \]and \[\gamma \]are dimensionless constants. The set \[(\alpha ,\beta ,\gamma )\]is given by
  A)
   \[(4,-3,-2)\]        
  done clear
  B)
  \[(-4,-3,\text{ }2)\]
  done clear
  C)
   \[(4,3,2)\]
  done clear
  D)
   \[(-4,-3,-2)\]
  done clear
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• question_answer11) An ideal gas with pressure\[{{P}_{1}},\]volume V and temperature T is expanded isothermally to a volume\[2V\]and a final pressure P. The same gas is expanded adiabatically to a volume 2V, the final pressure is\[{{P}_{A}}\]. In terms of the ratio of the two specific heats for the gas\[\gamma \]the ration\[{{P}_{1}}/{{P}_{A}}\]is
  A)
   \[{{2}^{\gamma -1}}\]
  done clear
  B)
   \[{{2}^{1-\gamma }}\]
  done clear
  C)
   \[2\gamma \]
  done clear
  D)
   \[{{2}^{\gamma }}\]
  done clear
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• question_answer12) The graph between potential energy Hand the intermolecular separations is as shown. The force between the molecules at the points A, B and C respectively is
  A)
   attractive, zero, repulsive
  done clear
  B)
   zero, repulsive, attractive
  done clear
  C)
   zero, attractive, repulsive
  done clear
  D)
   repulsive, zero, attractive
  done clear
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• question_answer13) The density of ice is 0.9 g/cc and that of sea water is 1.1 g/cc. An iceberg of volume V is floating in sea water. The fraction of iceberg above water level is
  A)
   \[1/11\]               
  done clear
  B)
   \[2/11\]
  done clear
  C)
   \[3/11\]               
  done clear
  D)
   \[4/11\]
  done clear
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• question_answer14) A planet has its mass and radius twice that of earth. If the acceleration due to gravity on the surface of earth is\[{{g}_{e}}\]and that on the surface of the planet is\[{{g}_{p}},\]the ratio\[\frac{{{g}_{e}}}{{{g}_{p}}}\]is
  A)
   \[1/2\]
  done clear
  B)
   \[\sqrt{{}}2\]
  done clear
  C)
   2
  done clear
  D)
   4
  done clear
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• question_answer15) The angular speed of earth in rad/s so that the objects on equator may appear weightless (taking\[g=10\text{ }m/{{s}^{2}}\]and radius of earth\[=6400\] km) is
  A)
   \[1.56\]
  done clear
  B)
   \[1.25\times {{10}^{-1}}\]
  done clear
  C)
   \[1.56\times {{10}^{-3}}\]
  done clear
  D)
   \[1.25\times {{10}^{-3}}\]
  done clear
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• question_answer16) The angular momentum of a rotating body is along the axis of its rotation. Its moment of inertia about this axis is 8 gem2. If its kinetic energy is 10 J, the magnitude of angular momentum, in S.I units, is
  A)
   \[4\times {{10}^{-3}}\]          
  done clear
  B)
   \[1.6\times {{10}^{-5}}\]
  done clear
  C)
   \[4\times {{10}^{-6}}\]          
  done clear
  D)
   4
  done clear
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• question_answer17) A particle of mass m is bound by a linear potential\[U=kr\](\[k=a\]constant) and moves in a circular orbit of radius r. Its energy is
  A)
   \[kr\]                
  done clear
  B)
   \[3/2kr\]
  done clear
  C)
   \[2kr\]               
  done clear
  D)
   \[4kr\]
  done clear
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• question_answer18) A particle, moving in a plane, is acted upon by a force of constant magnitude that is always perpendicular to the velocity of the particle. Pick out the correct statement/statements from the following (i) acceleration is constant (ii) kinetic energy is constant (iii) velocity is constant (iv) the particle moves in a circular path
  A)
   (iv) only          
  done clear
  B)
   (iii) and (iv)
  done clear
  C)
   (ii) and (iv)       
  done clear
  D)
   all statements
  done clear
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• question_answer19) Two particles of masses\[{{m}_{1}}\]and\[{{m}_{2}}\]( with\[{{m}_{1}}>{{m}_{2}}\]), initially at rest, move towards each other under an inverse square law force of attraction. Choose the correct statement about the center of mass (CM)
  A)
   the CM moves towards\[{{m}_{1}}\]
  done clear
  B)
   the CM moves towards\[{{m}_{2}}\]
  done clear
  C)
   the CM remains at rest
  done clear
  D)
   the motion of the CM is accelerated
  done clear
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• question_answer20) If the kinetic energy of a body is increased by 300 %, the momentum of the body is increased by
  A)
   50%            
  done clear
  B)
   100%
  done clear
  C)
   200%           
  done clear
  D)
   300%
  done clear
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• question_answer21) If the electric dipole moment (of magnitude\[6.2\times {{10}^{-30}}m\]) of a water molecule is initially pointing in a direction opposite to that of an electric field of magnitude\[1.5\times {{10}^{-4}}N/C\] The work done by the field in rotating the molecule into alignment with the field.
  A)
   \[-1.9\times {{10}^{25}}J\]    
  done clear
  B)
   zero
  done clear
  C)
   \[9.5\times {{10}^{-26}}J\]     
  done clear
  D)
   \[1.9\times {{10}^{-25}}J\]
  done clear
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• question_answer22) The electic potentials (in volts) at four points A,B,C and D are depicted in the figure. On which of the following paths will the work done on a charge of\[+2C\]be maximum. \[\begin{align}   & \bullet (+2V) \\  & \,\,\,\,\,D \\ \end{align}\] \[\begin{align}   & \bullet (-3V) \\  & \,\,\,\,\,C \\ \end{align}\] \[\begin{align}   & \bullet (+1V) \\  & \,\,\,\,\,B \\ \end{align}\] \[\begin{align}   & \bullet (-1V) \\  & \,\,\,\,\,A \\ \end{align}\]
  A)
   ABC           
  done clear
  B)
   AD
  done clear
  C)
   BAD           
  done clear
  D)
   BC
  done clear
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• question_answer23) A cube has its five sides grounded. The sixth side, insulated from the others, is held at an electric potential\[{{V}_{0}}.\]The potential at the centre of the cube will be
  A)
   zero
  done clear
  B)
   \[\frac{{{V}_{0}}}{6}\]
  done clear
  C)
   \[\frac{{{V}_{0}}}{5}\]
  done clear
  D)
   \[\frac{{{V}_{0}}}{3}\]
  done clear
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• question_answer24) Gauss law would be invalid if
  A)
   there were magnetic monopoles
  done clear
  B)
   the inverse square law was not exactly true
  done clear
  C)
   the speed of light was not a universal constant
  done clear
  D)
   the electriqal charge was not quantized
  done clear
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• question_answer25) An open organ pipe and a closed organ pipe are tuned to the same tuning fork. The lengths of the open and closed pipes are in the ratio of
  A)
   \[1:2\]               
  done clear
  B)
   \[4:1\]
  done clear
  C)
   \[3:1\]               
  done clear
  D)
   \[2:1\]
  done clear
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• question_answer26) Transverse wave traveling on a rope is expressed by the equation \[y=10\sin (4\pi t-0.02\pi x)\]where\[x,\]y are in cms and\[t\]is in second. The wavelength and the maximum velocity of a particle in the rope are given in cm and cm/s, respectively by
  A)
   \[50,\text{ }40\pi \]          
  done clear
  B)
   \[100,\text{ 4}0\pi \]
  done clear
  C)
   \[100,\text{ 2}0\pi \]      
  done clear
  D)
   \[100,\text{ 8}0\pi \]
  done clear
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• question_answer27) The vertical harmonic oscillations of three spring systems are shown in figures I, II and III. If all the springs are identical each having a force constant k. The ratio of the time periods of the systems is
  A)
   \[1:\sqrt{{}}2:\frac{1}{\sqrt{{}}2}\]
  done clear
  B)
   \[1:\sqrt{{}}2:\sqrt{{}}2\]
  done clear
  C)
   \[\sqrt{{}}2:1:\frac{1}{\sqrt{{}}2}\]
  done clear
  D)
   \[\sqrt{{}}2:1:2\]
  done clear
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• question_answer28) Some examples of periodic motion are 1. A seconds pendulum 2. Human pulse, 3, Alternating current 4. Earths rotation about its own axis. 5. Moon moving round the earth. Which of the following sequence arranges the time periods of these motions in correct increasing order?
  A)
   \[1\text{ }2\text{ }3\text{ }4\text{ }5\]    
  done clear
  B)
   \[2\text{ }1\text{ }3\text{ }4\text{ }5\]
  done clear
  C)
   \[3\text{ }2\text{ }4\text{ }1\text{ }5\]  
  done clear
  D)
   \[3\text{ }2\text{ }1\text{ }4\text{ }5\]
  done clear
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• question_answer29) A Carnots reversible engine converts 1/6 of heat input into work. When the temperature of the sink is reduced by 62 K. The efficiency of Carnots cycle becomes 1/3. The temperatures of the source and the sink, in degree Kelvin, are respectively
  A)
   372, 310         
  done clear
  B)
   472, 410
  done clear
  C)
   310, 372         
  done clear
  D)
   744, 682
  done clear
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• question_answer30) An ideal mono atomic gas is taken round the cycle ABCDA as shown in the PV diagram. The work done during the cycle is
  A)
   zero
  done clear
  B)
   1/2 PV
  done clear
  C)
   PV        
  done clear
  D)
   2PV
  done clear
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• question_answer31) When an object is at distances\[{{u}_{1}}\]and\[{{u}_{2}}\]from a lens a real image and a virtual image is formed respectively having the same magnification. The focal length of the lens is
  A)
   \[{{u}_{1}}+\frac{{{u}_{2}}}{2}\]
  done clear
  B)
   \[\frac{{{u}_{1}}-{{u}_{2}}}{2}\]
  done clear
  C)
   \[\frac{{{u}_{1}}+{{u}_{2}}}{2}\]
  done clear
  D)
   \[{{u}_{1}}+{{u}_{2}}\]
  done clear
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• question_answer32) Which of the following electromagnetic radiations suffers least diffraction on passing through a narrow aperture?
  A)
   ultraviolet rays    
  done clear
  B)
   green light
  done clear
  C)
   infrared rays      
  done clear
  D)
   gamma rays
  done clear
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• question_answer33) In an A.C. circuit the potential differences across an inductance and resistance joined in series are 12V and 16V respectively. The total potential difference across the circuit, in volts, is
  A)
   39.2              
  done clear
  B)
   36
  done clear
  C)
   20                
  done clear
  D)
   4
  done clear
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• question_answer34) The average power delivered to an A.C circuit by the source of emf is maximum when circuit is
  A)
   purely inductive  
  done clear
  B)
   purely resistive
  done clear
  C)
   purely capacitive
  done clear
  D)
   series LCR away from resonance.
  done clear
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• question_answer35) In the given diagram XY is a solenoid of insulated wire Fix on a cardboard tube and PQ is a soft iron cylinder. The current is switched on and is in the direction indicated by the arrows. Which of the following pair of poles is correct?
  A)
   X is north and P is south
  done clear
  B)
   X is north and P is north
  done clear
  C)
   Y is north and P is north
  done clear
  D)
   Y is south and P is south
  done clear
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• question_answer36) A wire of given length is first bent in a single circular loop. Next, it is bent in three loops. If the same current is passed in both the cases, the ratio of magnetic fields (in the first to the second situation) at their centers is
  A)
   9                 
  done clear
  B)
   \[1/3\]
  done clear
  C)
   \[1/4\] 
  done clear
  D)
   \[1/9\]
  done clear
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• question_answer37) A rectangular loop carrying a current\[i\]is situated near a long straight wire, such that the wire is parallel to one of the sides of the loop and is in the plane of the loop. If a steady current\[I\]is established in the wire as shown in the diagram, the loop will
  A)
   move away from the wire
  done clear
  B)
   rotate about an axis parallel to wire
  done clear
  C)
   remain stationary
  done clear
  D)
   move towards the wire
  done clear
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• question_answer38) In an experiment to determine the electrochemical equivalent (ECE) of copper using a copper voltameter the time current graph is as shown. If the mass deposited in 30 minutes is m grams, the ECE of copper, in g/C is
  A)
   \[\frac{m}{120}\]
  done clear
  B)
   \[\frac{m}{60}\]
  done clear
  C)
   \[\frac{m}{30}\]
  done clear
  D)
   \[\frac{m}{2}\]
  done clear
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• question_answer39) In the given circuit current in the arm BD is
  A)
   zero               
  done clear
  B)
   \[I/2\]
  done clear
  C)
   \[I\]                  
  done clear
  D)
   \[2I\]
  done clear
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• question_answer40) Consider the statements A: Internal resistance of a cell depends on the distance between the plates but the emf does not. B: The emf of a cell does not depend on the area of the electrodes but the internal resistance does. Pick out the correct statement/statements:
  A)
   only A            
  done clear
  B)
   only B
  done clear
  C)
   both A and B      
  done clear
  D)
   neither A nor B
  done clear
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• question_answer41) Photons cannot escape from the surface of a
  A)
   white dwarf      
  done clear
  B)
   red giant
  done clear
  C)
   pulsar            
  done clear
  D)
   black hole
  done clear
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• question_answer42) The gate corresponding to the following truth table is called

  Inputs		Output
  0	0	0
  0	1	1
  1	0	1
  1	1	0

   
  A)
   NAND         
  done clear
  B)
   NOR
  done clear
  C)
   AND         
  done clear
  D)
   XOR
  done clear
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• question_answer43) In an insulator, the forbidden energy gap between the valence band and the coduction hand is of the order of
  A)
   0.1 MeV        
  done clear
  B)
   0.1 keV
  done clear
  C)
   5 eV           
  done clear
  D)
   1 eV
  done clear
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• question_answer44) Consider     the     nuclear     reaction\[{{X}^{200}}\to {{Y}^{100}}+{{Z}^{90}}+\]energy. If the binding energies per nucleon for the nuclei X, Y and Z are 7.4 MeV, 8.2 MeV and 8.2 MeV respectively the energy released, in MeV, is
  A)
   200             
  done clear
  B)
   160
  done clear
  C)
   110              
  done clear
  D)
   90
  done clear
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• question_answer45) A freshly prepared radioactive sample of half life 2 hours emits radiations of intensity that is 64 times the permissible safe limit. The minimum time after which it would be possible to work safely with this source is
  A)
   36 hours         
  done clear
  B)
   24 hours
  done clear
  C)
   12 hours         
  done clear
  D)
   10 hours
  done clear
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• question_answer46) The first excited state of hydrogen atom is 10.2 eV above its ground state. The temperature needed to excite the hydrogen atom to the excited state will be of the order of
  A)
   \[{{10}^{3}}K\]             
  done clear
  B)
   \[{{10}^{5}}K\]
  done clear
  C)
   \[{{10}^{6}}K\]            
  done clear
  D)
   \[{{10}^{8}}K\]
  done clear
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• question_answer47) Imagine a Youngs double slit interference experiment performed with electron waves associated with fast moving electrons coming from an electron gun. The distance between successive maxima will decrease if the
  A)
   accelerating voltage in electron gun is increased
  done clear
  B)
   accelerating voltage is decreased
  done clear
  C)
   distance between the screen and the. slits is increased
  done clear
  D)
   distance between the slits is decreased
  done clear
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• question_answer48) For three different metals A,B,C photoemission is observed one by one. The graphs of maximum kinetic energy\[({{K}_{\max }})vs\]frequency of incident radiation (i)) are sketched as

  (I)

  (II)

  (III)

  (IV)

  Which one of these represents the correct situation?
  A)
   I                  
  done clear
  B)
   II
  done clear
  C)
   III                
  done clear
  D)
   IV
  done clear
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• question_answer49) A beam of light of wave length 6000 A from a distant source falls on a single slit 1 mm wide and the resulting diffraction pattern is observed on a screen 2 m away. The distance between the first dark fringes on either side of the central bright fringe is
  A)
   2.4 cm           
  done clear
  B)
   1.2 cm
  done clear
  C)
   2.4 mm            
  done clear
  D)
   1.2 mm
  done clear
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• question_answer50) The focal length of the objective of an astronomical telescope is 1.0 m if the magnifying power of the telescope is 20 the length of the telescope for relaxed eye in cm is
  A)
   95               
  done clear
  B)
   105
  done clear
  C)
   120              
  done clear
  D)
   125
  done clear
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• question_answer51) Which of the following statements is incorrect?
  A)
   activation energy for the forward reaction equals activation energy for the reverse reaction
  done clear
  B)
   for a reversible reaction, an increase in temperature increases the reaction rate for both the forward and backward reactions
  done clear
  C)
   the larger the initial reactant concentration for a second order reaction, the shorter is its half life
  done clear
  D)
   when average rate is infinitesimally small, the average rate equals the instantaneous rate
  done clear
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• question_answer52) A vessel that holds 4.0 g of oxygen at STP will be able to contain the following weight of helium at STP
  A)
   4.0 g               
  done clear
  B)
   1.0 g
  done clear
  C)
   0.5 g               
  done clear
  D)
   2.0 g
  done clear
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• question_answer53) Oxidation number of carbon in\[C{{H}_{2}}C{{l}_{2}}\]is
  A)
   \[-4\]             
  done clear
  B)
   \[+4\]
  done clear
  C)
   0               
  done clear
  D)
   \[-2\]
  done clear
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• question_answer54) Which of the following halides is the most stable?
  A)
   \[C{{F}_{4}}\]              
  done clear
  B)
   \[C{{l}_{4}}\]
  done clear
  C)
   \[CB{{r}_{4}}\]             
  done clear
  D)
   \[CC{{l}_{4}}\]
  done clear
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• question_answer55) Which of the following combinations of quantum numbers are allowed?
  A)
  \[_{3}^{N}\,\,\,\,\,\,\,\,\,\,\,\,\,_{2}^{l}\,\,\,\,\,\,\,\,\,\,\,\,\,_{1}^{{{m}_{1}}}\,\,\,\,\,\,\,\,\,\,_{1}^{{{m}_{s}}}\]
  done clear
  B)
  \[_{2}^{N}\,\,\,\,\,\,\,\,\,\,\,\,\,_{0}^{l}\,\,\,\,\,\,\,\,\,\,\,\,\,_{0}^{{{m}_{1}}}\,\,\,\,\,\,\,\,\,\,_{-1/2}^{{{m}_{s}}}\]
  done clear
  C)
  \[_{3}^{N}\,\,\,\,\,\,\,\,\,\,\,\,\,_{-3}^{l}\,\,\,\,\,\,\,\,\,\,\,\,\,_{-2}^{{{m}_{1}}}\,\,\,\,\,\,\,\,\,\,_{-1/2}^{{{m}_{s}}}\]
  done clear
  D)
  \[_{2}^{N}\,\,\,\,\,\,\,\,\,\,\,\,\,_{-2}^{l}\,\,\,\,\,\,\,\,\,\,\,\,\,_{0}^{{{m}_{1}}}\,\,\,\,\,\,\,\,\,\,_{+1/2}^{{{m}_{s}}}\]
  done clear
  View Answer play_arrow

• question_answer56) Which of the following statements is incorrect?
  A)
   cathode rays carry negative charge
  done clear
  B)
   frequency of X - rays is higher than that of microwaves
  done clear
  C)
   unit for wave number is\[{{m}^{-1}}\]
  done clear
  D)
   threshold frequency is not the same for all metals
  done clear
  View Answer play_arrow

• question_answer57) In which of the following pairs hydrogen bonding is not possible?
  A)
   \[N{{H}_{3}},N{{H}_{3}}\]
  done clear
  B)
   \[N{{H}_{3}},C{{H}_{4}}\]
  done clear
  C)
   \[{{H}_{2}}O,C{{H}_{3}}OC{{H}_{3}}\]
  done clear
  D)
   \[P{{H}_{3}}\]
  done clear
  View Answer play_arrow

• question_answer58) Which of the following would have the smallest bond angle\[H-X-H\]where X is the hetero atom?
  A)
   \[C{{H}_{4}}\]            
  done clear
  B)
   \[N{{H}_{3}}\]
  done clear
  C)
   \[{{H}_{2}}O\]           
  done clear
  D)
   \[P{{H}_{3}}\]
  done clear
  View Answer play_arrow

• question_answer59) Which of the following statements is correct?
  A)
   all diatomic molecules are polar
  done clear
  B)
   ammonia,\[N{{H}_{3}}\]and boron trichloride,\[BC{{l}_{3}}\]are both polar molecules
  done clear
  C)
   all polar diatomic molecules are composed of two different elements
  done clear
  D)
   all molecules of the type\[A{{B}_{4}}\]are polar
  done clear
  View Answer play_arrow

• question_answer60) Which is not true is case of an ideal gas?
  A)
   it cannot be converted into a liquid
  done clear
  B)
   there is no interaction between the molecules
  done clear
  C)
   all molecules of the gas move with same speed
  done clear
  D)
   at a given temperature, PV is proportional to the amount of the gas
  done clear
  View Answer play_arrow

• question_answer61) Ionic product of water,\[{{k}_{w}},\]is\[1\times {{10}^{-14}}\]at\[290{}^\circ K\]does it
  A)
   increase at higher temperature
  done clear
  B)
   increase at lower temperature    
  done clear
  C)
   remain the same at all temperatures
  done clear
  D)
   get affected by pressure as well as temperature
  done clear
  View Answer play_arrow

• question_answer62) Which of the following will form a cell with the highest voltage?
  A)
   \[1M\,A{{g}^{+}},1M\,C{{o}^{2+}}\]
  done clear
  B)
   \[2M\,A{{g}^{+}},2M\,C{{o}^{2+}}\]
  done clear
  C)
   \[0.1M\,A{{g}^{+}},2M\,C{{o}^{2+}}\]
  done clear
  D)
  \[2M\,A{{g}^{+}},0.1\,M\,C{{o}^{2+}}\]
  done clear
  View Answer play_arrow

• question_answer63) Which of the following will form the cathode with respect to iron anode in an electrolytic cell?
  A)
   \[Mg\]              
  done clear
  B)
   \[Al\]
  done clear
  C)
   \[Cu\]               
  done clear
  D)
   \[Zn\]
  done clear
  View Answer play_arrow

• question_answer64) In the following reaction, which is the species being oxidised? \[2F{{e}^{3+}}(aq)+2{{I}^{-}}(aq)\to {{I}_{2}}(aq)+2F{{e}^{2+}}(aq)\]
  A)
   \[F{{e}^{3+}}\]               
  done clear
  B)
   \[{{I}^{-}}\]
  done clear
  C)
   \[{{I}_{2}}\]                 
  done clear
  D)
   \[F{{e}^{2+}}\]
  done clear
  View Answer play_arrow

• question_answer65) Which of the following conditions will apply to the conversion of ice into water?
  A)
  \[_{-}^{\Delta H}\,\,\,\,\,\,\,\,\,\,\,\,\,_{-}^{\Delta S}\,\,\,\,\,\,\,\,\,\,\,\,\,_{-}^{\Delta G}\,\,\,\,\,\,\,\,\,\,_{\text{at}\,\text{low}\,\text{T}}^{{}}\]
  done clear
  B)
  \[_{-}^{\Delta H}\,\,\,\,\,\,\,\,\,\,\,\,\,_{-}^{\Delta S}\,\,\,\,\,\,\,\,\,\,\,\,\,_{+}^{\Delta G}\,\,\,\,\,\,\,\,\,\,_{\text{at}\,\text{high}\,\text{T}}^{{}}\]
  done clear
  C)
  \[_{+}^{\Delta H}\,\,\,\,\,\,\,\,\,\,\,\,\,_{+}^{\Delta S}\,\,\,\,\,\,\,\,\,\,\,\,\,_{+}^{\Delta G}\,\,\,\,\,\,\,\,\,\,_{\text{at}\,\text{low}\,\text{T}}^{{}}\]
  done clear
  D)
  \[_{+}^{\Delta H}\,\,\,\,\,\,\,\,\,\,\,\,\,_{+}^{\Delta S}\,\,\,\,\,\,\,\,\,\,\,\,\,_{-}^{\Delta G}\,\,\,\,\,\,\,\,\,\,_{\text{at}\,\text{high}\,\text{T}}^{{}}\]
  done clear
  View Answer play_arrow

• question_answer66) A gas is enclosed in a room. The temperature, pressure, density and number of moles of the gas respectively are\[t{}^\circ C,\text{ }p\]atm,\[dg\text{ }c{{m}^{-3}}\]and n. If the room is partitioned into four equal compartments which of these quantities will be different in the small compartments?
  A)
   temperature      
  done clear
  B)
   pressure
  done clear
  C)
   density          
  done clear
  D)
   number of moles
  done clear
  View Answer play_arrow

• question_answer67) An aqueous solution of sucrose,\[{{C}_{12}}{{H}_{22}}{{O}_{11}},\] containing 34.2 g/1 has an osmotic pressure of 2.38 atmospheres at\[17{}^\circ C\]for an aqueous solution of glucose,\[{{C}_{6}}{{H}_{12}}{{O}_{6}}\]to be isotonic with this solution, it would have
  A)
   34.2 g/1           
  done clear
  B)
   17.1 g/1
  done clear
  C)
   18.0 g/1           
  done clear
  D)
   36.0 g/1 of glucose
  done clear
  View Answer play_arrow

• question_answer68) If all the four following compounds were sold at the same price, which would be cheapest for preparing an antifreeze solution for a car radiator?
  A)
   \[C{{H}_{3}}OH\]         
  done clear
  B)
   \[{{C}_{2}}{{H}_{5}}OH\]
  done clear
  C)
   \[{{C}_{2}}{{H}_{4}}{{(OH)}_{2}}\]       
  done clear
  D)
   \[{{C}_{3}}{{H}_{5}}{{(OH)}_{3}}\]
  done clear
  View Answer play_arrow

• question_answer69) It is found that 0.1 M solutions of four sodium salts\[NaA,NaB,NaC\]and\[NaD\]have the following pH values
  A)
   \[NaD\text{ }11.0\]        
  done clear
  B)
   \[NaC\text{ }10.0\]
  done clear
  C)
   \[NaB\text{ }9.0\]         
  done clear
  D)
   \[NaA\text{ }7.0\]
  done clear
  View Answer play_arrow

• question_answer70) Will the dissociation of\[PC{{l}_{5}}\]in the reaction \[PC{{l}_{5}}(g)PC{{l}_{3}}(g)+C{{l}_{2}}(g);\Delta H=+2.22\]Kcal be favoured by
  A)
   increasing temperature
  done clear
  B)
   increasing pressure
  done clear
  C)
   adding more \[PC{{l}_{3}}\]
  done clear
  D)
   adding more\[C{{l}_{2}}\]
  done clear
  View Answer play_arrow

• question_answer71) A 6 volume sample of \[{{H}_{2}}{{O}_{2}}\]
  A)
   will contain 6% v/V of\[{{H}_{2}}{{O}_{2}}\]
  done clear
  B)
   will contain 6% w/V of\[{{H}_{2}}{{O}_{2}}\]
  done clear
  C)
   would give 6 volumes of oxygen per unit volume of\[{{H}_{2}}{{O}_{2}}\]sample at STP
  done clear
  D)
   would give 6 volumes of oxygen per unit weight of\[{{H}_{2}}{{O}_{2}}\]sample at STP
  done clear
  View Answer play_arrow

• question_answer72) Which of the following properties of aluminium makes it useful for food packaging?
  A)
   Good thermal conductivity
  done clear
  B)
   Good electrical conductivity
  done clear
  C)
   Low density
  done clear
  D)
   Non-toxicity
  done clear
  View Answer play_arrow

• question_answer73) Which of the following statements is incorrect?
  A)
   sodium is the most abundant metal in earths crust
  done clear
  B)
   sodium is the most abundant metallic element in sea water
  done clear
  C)
   melting and boiling points of alkali metals decrease down the group
  done clear
  D)
   ionic character of alkali metal halides decreases down the group.
  done clear
  View Answer play_arrow

• question_answer74) Which of the following hydrogen halides would have the highest boiling points?
  A)
  \[HF\]              
  done clear
  B)
  \[HCl\]
  done clear
  C)
  \[HBr\]             
  done clear
  D)
  \[HI\]
  done clear
  View Answer play_arrow

• question_answer75) Polarisation power of a cation increases, when
  A)
   charge of the cation increases
  done clear
  B)
   size of the cation increases
  done clear
  C)
   charge of the cation decreases
  done clear
  D)
   has no relation to its charge or size
  done clear
  View Answer play_arrow

• question_answer76) Which of the atoms having the following electronic configuration will have the highest first ionization energy?
  A)
   \[[Ne],\text{ }2{{s}^{2}},\text{ }3{{p}^{2}}\]     
  done clear
  B)
   \[[Ne],\text{ }3{{s}^{2}},\text{ }3{{p}^{3}}\]
  done clear
  C)
   \[[Ne],\text{ 3}{{s}^{2}},\text{ 2}{{p}^{4}}\]    
  done clear
  D)
   \[[He],\text{ }2{{s}^{2}},\text{ }2{{p}^{3}}\]
  done clear
  View Answer play_arrow

• question_answer77) Which of the following isoelectronic species has the smallest atomic radius?
  A)
   \[{{N}^{3-}}\]              
  done clear
  B)
   \[{{O}^{2-}}\]
  done clear
  C)
   \[{{F}^{-}}\]               
  done clear
  D)
   \[Ne\]
  done clear
  View Answer play_arrow

• question_answer78) Which of the following is a stable ion?
  A)
   \[R{{b}^{2+}}\]             
  done clear
  B)
   \[B{{a}^{3+}}\]
  done clear
  C)
   \[S{{e}^{2-}}\]             
  done clear
  D)
   \[S{{n}^{4+}}\]
  done clear
  View Answer play_arrow

• question_answer79) Which of the following conceivable structures for\[CC{{l}_{4}}\]will have a zero dipole moment?
  A)
   square planner
  done clear
  B)
   square pyramid ( carbon at apex)
  done clear
  C)
   irregular tetrahedron
  done clear
  D)
   none of the above
  done clear
  View Answer play_arrow

• question_answer80) Which of the following will not act as a buffer?
  A)
   \[NaHC{{O}_{3}}+{{H}_{2}}C{{O}_{3}}\]
  done clear
  B)
   \[NaOH+NaCl\]
  done clear
  C)
   \[C{{H}_{3}}COOH+C{{H}_{3}}COONa\]
  done clear
  D)
   \[N{{H}_{4}}OH+N{{H}_{4}}Cl\]
  done clear
  View Answer play_arrow

• question_answer81) In which of the following resonance will be possible?
  A)
   \[C{{H}_{2}}=CH-C{{H}_{2}}-CHO\]
  done clear
  B)
   \[C{{H}_{2}}=CH-CHO\]
  done clear
  C)
   \[C{{H}_{3}}COC{{H}_{3}}\]
  done clear
  D)
   \[C{{H}_{2}}=CH-C{{H}_{2}}-CH=C{{H}_{2}}\]
  done clear
  View Answer play_arrow

• question_answer82) Which of the following isomers will have the highest boiling points?
  A)
  \[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}C{{H}_{2}}C{{H}_{2}}C{{H}_{3}}\]
  done clear
  B)
   \[C{{H}_{3}}-\underset{\begin{smallmatrix}  | \\  C{{H}_{3}} \end{smallmatrix}}{\mathop{CH}}\,-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{3}}\]
  done clear
  C)
   \[C{{H}_{3}}-\underset{\begin{smallmatrix}  | \\  C{{H}_{3}} \end{smallmatrix}}{\mathop{CH}}\,-\underset{\begin{smallmatrix}  | \\  C{{H}_{3}} \end{smallmatrix}}{\mathop{CH}}\,-C{{H}_{3}}\]
  done clear
  D)
   \[C{{H}_{3}}-\underset{\begin{smallmatrix}  | \\  C{{H}_{3}} \end{smallmatrix}}{\mathop{\overset{\begin{smallmatrix}  C{{H}_{3}} \\  | \end{smallmatrix}}{\mathop{C}}\,}}\,-C{{H}_{2}}-C{{H}_{3}}\]
  done clear
  View Answer play_arrow

• question_answer83) Which of the following isomers will have the highest octane number?
  A)
  \[C{{H}_{3}}-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{3}}\]
  done clear
  B)
  \[C{{H}_{3}}-\underset{\begin{smallmatrix}  | \\  C{{H}_{3}} \end{smallmatrix}}{\mathop{CH}}\,-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{3}}\]
  done clear
  C)
   \[C{{H}_{3}}-\underset{\begin{smallmatrix}  | \\  C{{H}_{3}} \end{smallmatrix}}{\mathop{CH}}\,-\underset{\begin{smallmatrix}  | \\  C{{H}_{3}} \end{smallmatrix}}{\mathop{CH}}\,-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{3}}\]
  done clear
  D)
   \[C{{H}_{3}}-\overset{\begin{smallmatrix}  C{{H}_{3}} \\  | \end{smallmatrix}}{\mathop{CH}}\,-C{{H}_{2}}-\underset{\begin{smallmatrix}  | \\  C{{H}_{3}} \end{smallmatrix}}{\mathop{\overset{\begin{smallmatrix}  C{{H}_{3}} \\  | \end{smallmatrix}}{\mathop{C}}\,}}\,-C{{H}_{3}}\]
  done clear
  View Answer play_arrow

• question_answer84) Which of the following is an example of electrophilic addition?
  A)
   
  done clear
  B)
   \[C{{H}_{3}}-CH=C{{H}_{2}}+HBr\to C{{H}_{3}}CHBrC{{H}_{3}}\]
  done clear
  C)
   \[C{{H}_{3}}-CH=CH-C{{H}_{3}}+HBr\xrightarrow[{}]{peroxide}\]\[C{{H}_{3}}-C{{H}_{2}}-C{{H}_{2}}-C{{H}_{2}}Br\]
  done clear
  D)
   \[C{{H}_{3}}CH=C{{H}_{2}}+{{H}_{2}}\xrightarrow[{}]{catalysts}\]\[C{{H}_{3}}C{{H}_{2}}-C{{H}_{3}}\]
  done clear
  View Answer play_arrow

• question_answer85) Which of the following compounds is isomeric with 2,2, 4,4 - tetramethylhexane?
  A)
   3-Ethyl-2, 2-dimethylpentane
  done clear
  B)
   4-Isopropyl heptane
  done clear
  C)
   4-Ethyl-3 methyl-4-w-propyloctane
  done clear
  D)
   4, 4-Diethyl-3-methyIheptane
  done clear
  View Answer play_arrow

• question_answer86) The number of possible isomeric compounds for molecular formula \[{{C}_{5}}{{H}_{10}}\]would be
  A)
   8               
  done clear
  B)
   7
  done clear
  C)
   6               
  done clear
  D)
   5
  done clear
  View Answer play_arrow

• question_answer87) Electronic configuration of four neutral atoms is given below. Which of the corresponding element would be diamagnetic?
  A)
   \[1{{s}^{2}},\text{ }2{{s}^{2}},\text{ }2{{p}^{6}}\]        
  done clear
  B)
   \[1{{s}^{2}},\text{ 2}{{s}^{2}},\text{ }2{{p}^{1}}\]
  done clear
  C)
   \[1{{s}^{2}},\text{ }2{{s}^{2}},\text{ }2{{p}^{5}}\]       
  done clear
  D)
   \[1{{s}^{2}},\text{ }2{{s}^{2}},\text{ }2{{p}^{4}}\]
  done clear
  View Answer play_arrow

• question_answer88) The first \[(I{{E}_{1}})\]and second\[(I{{E}_{2}})\]ionization energies\[\text{(kj/mol)}\]of a few elements designated by Roman numerals are given below. Which of these would be an alkali metal?
  A)
  \[_{\text{I}}^{{}}\,\,\,\,\,\,\,\,\,\,\,\,\,_{\text{2372}}^{\text{I}{{\text{E}}_{\text{1}}}}\,\,\,\,\,\,\,\,\,\,\,\,_{\text{5251}}^{\text{I}{{\text{E}}_{\text{2}}}}\]
  done clear
  B)
  \[_{\text{II}}^{{}}\,\,\,\,\,\,\,\,\,\,\,\,\,_{520}^{\text{I}{{\text{E}}_{\text{1}}}}\,\,\,\,\,\,\,\,\,\,\,\,_{7300}^{\text{I}{{\text{E}}_{\text{2}}}}\]
  done clear
  C)
  \[_{\text{III}}^{{}}\,\,\,\,\,\,\,\,\,\,\,\,\,_{900}^{\text{I}{{\text{E}}_{\text{1}}}}\,\,\,\,\,\,\,\,\,\,\,\,_{1760}^{\text{I}{{\text{E}}_{\text{2}}}}\]
  done clear
  D)
  \[_{\text{IV}}^{{}}\,\,\,\,\,\,\,\,\,\,\,\,\,_{1680}^{\text{I}{{\text{E}}_{\text{1}}}}\,\,\,\,\,\,\,\,\,\,\,\,_{3380}^{\text{I}{{\text{E}}_{\text{2}}}}\]
  done clear
  View Answer play_arrow

• question_answer89) Oxidation state of the metal ion in the complex \[{{[Fe{{(CN)}_{3}}]}^{3-}}\]is
  A)
   +3               
  done clear
  B)
   \[-3\]
  done clear
  C)
   +6               
  done clear
  D)
   \[-6\]
  done clear
  View Answer play_arrow

• question_answer90) Which of the following is the strongest acid?
  A)
   \[HOCl\]           
  done clear
  B)
   \[HOCl{{O}_{2}}\]
  done clear
  C)
   \[HOCl{{O}_{3}}\]         
  done clear
  D)
   \[HOClO\]
  done clear
  View Answer play_arrow

• question_answer91) In the following sequence of reactions, the compound C formed would be \[C{{H}_{3}}-\underset{\begin{smallmatrix}  | \\  N{{H}_{2}} \end{smallmatrix}}{\mathop{CH}}\,-C{{H}_{3}}\xrightarrow[{}]{HN{{O}_{2}}}A\xrightarrow[{}]{OX}B\] \[\xrightarrow[{{H}^{+}}/{{H}_{2}}O]{C{{H}_{3}}MgI}C\]
  A)
   butanol - 1
  done clear
  B)
   butanol - 2
  done clear
  C)
   2 - methylpropanol - 2
  done clear
  D)
   1,1 - Dimethylethanol
  done clear
  View Answer play_arrow

• question_answer92) Which of the following applies in this reaction? \[C{{H}_{3}}-CHBr-C{{H}_{2}}-C{{H}_{3}}\xrightarrow[{}]{alc\,KOH}\] (i) \[C{{H}_{3}}-CH=CH-C{{H}_{3}}\]major product (ii) \[C{{H}_{2}}=CH-C{{H}_{2}}-C{{H}_{3}}\]minor product
  A)
   Markownikoff rule
  done clear
  B)
   Saytzeffs rule
  done clear
  C)
   Kharasch effect   
  done clear
  D)
   Hofmanns rule
  done clear
  View Answer play_arrow

• question_answer93) Which of the following isomeric alcohols react fastest with\[HCl\]?
  A)
   butanol - 1
  done clear
  B)
   2 - methyl propanol -1
  done clear
  C)
   2,2 - dimethyl ethanol
  done clear
  D)
   butanol - 2
  done clear
  View Answer play_arrow

• question_answer94) Which of the following statements is incorrect?
  A)
   enzymes are organic catalysts
  done clear
  B)
   enzymes have a very large turnover number
  done clear
  C)
   enzyme action is specific
  done clear
  D)
   enzymes always require a coenzyme for their catalytic action?
  done clear
  View Answer play_arrow

• question_answer95) Which of the following hormones regulates sugar metabolism in the body?
  A)
   adrenaline        
  done clear
  B)
   insulin
  done clear
  C)
   thyroxine         
  done clear
  D)
   estrone
  done clear
  View Answer play_arrow

• question_answer96) Deficiency of which of the following vitamin adversely affects eyesight?
  A)
   A                
  done clear
  B)
   D
  done clear
  C)
   \[{{B}_{2}}\]               
  done clear
  D)
   E
  done clear
  View Answer play_arrow

• question_answer97) Under which of the following conditions would toluene,\[{{C}_{6}}{{H}_{5}}-C{{H}_{3}}\]be converted into bromomethyl benzene\[{{C}_{6}}{{H}_{5}}-C{{H}_{2}}Br\]?
  A)
   reaction with \[B{{r}_{2}}/FeB{{r}_{3}}\]
  done clear
  B)
   reaction with\[B{{r}_{2}}\]in sunlight
  done clear
  C)
   reaction with\[B{{r}_{2}}\]in dark
  done clear
  D)
   reaction with\[HBr\]
  done clear
  View Answer play_arrow

• question_answer98) Which of the following will have the fastest rate of reaction with\[B{{r}_{2}}/FeB{{r}_{3}}\]?
  A)
   
  done clear
  B)
   
  done clear
  C)
   
  done clear
  D)
   
  done clear
  View Answer play_arrow

• question_answer99) If one strand of DNA has the sequence ATGCTTGA, the sequence in the complementary stand would be
  A)
   TACGAACT   
  done clear
  B)
   TCCGAACT
  done clear
  C)
   TACGTACT    
  done clear
  D)
   TACGTAGT
  done clear
  View Answer play_arrow

• question_answer100) Which of the following will give iodoform reaction?
  A)
   \[C{{H}_{3}}C{{H}_{2}}C{{H}_{2}}-C{{H}_{2}}OH\]
  done clear
  B)
   \[C{{H}_{3}}CHOH.C{{H}_{3}}\]
  done clear
  C)
   \[C{{H}_{3}}C{{H}_{2}}COH\]
  done clear
  D)
   \[C{{H}_{3}}C{{H}_{2}}C{{H}_{3}}\]
  done clear
  View Answer play_arrow

• question_answer101) In oocyte secondary maturation occurs in
  A)
   ovary             
  done clear
  B)
   abdominal cavity
  done clear
  C)
   fallopian tube     
  done clear
  D)
   uterus.
  done clear
  View Answer play_arrow

• question_answer102) Repair of endometrium is undertaken by
  A)
   LH              
  done clear
  B)
   FSH
  done clear
  C)
   estrogen         
  done clear
  D)
   prolactin.
  done clear
  View Answer play_arrow

• question_answer103) Parathormone (PTH)
  A)
   increases blood\[Ca\]level
  done clear
  B)
   decreases bone\[Ca\]level
  done clear
  C)
   decreases blood\[Ca\]level
  done clear
  D)
   increases blood\[Ca\]level and decreases bone\[Ca\]level.
  done clear
  View Answer play_arrow

• question_answer104) Conn disease is caused by hypersecretion of
  A)
   parathyroid       
  done clear
  B)
   adrenal
  done clear
  C)
   thyroid           
  done clear
  D)
   pituitary.
  done clear
  View Answer play_arrow

• question_answer105) Name the hormone associated with the metabolism of phosphorus and calcium?
  A)
   glucocorticoids   
  done clear
  B)
   mineralocorticoids
  done clear
  C)
   calcitonin        
  done clear
  D)
   glucagon.
  done clear
  View Answer play_arrow

• question_answer106) Deficiency of thyroid hormone causes
  A)
   exophthalmic goitre
  done clear
  B)
   acromegaly
  done clear
  C)
   myxoedema      
  done clear
  D)
   hyperglycemia.
  done clear
  View Answer play_arrow

• question_answer107) Tadpole of frog is
  A)
   ammonotelic      
  done clear
  B)
   ureotelic
  done clear
  C)
   uricotelic         
  done clear
  D)
   none of these.
  done clear
  View Answer play_arrow

• question_answer108) Kidney of adult reptiles are
  A)
   mesonephric      
  done clear
  B)
   metanephric
  done clear
  C)
   pronephric       
  done clear
  D)
   both [a] and [b]
  done clear
  View Answer play_arrow

• question_answer109) During winter a person died during sleep, the room was closed and a container with burnt charcoal was found in the room. What may be the possible reason of his death?
  A)
   non-availability of oxygen
  done clear
  B)
   Hb has more affinity to combine with carbon monoxide
  done clear
  C)
   Hb has more affinity to combine with nitrogen
  done clear
  D)
   combined effect of [a] and [b].
  done clear
  View Answer play_arrow

• question_answer110) Which cell cannot divide following birth in humans?
  A)
   muscle cells      
  done clear
  B)
   erythroblasts
  done clear
  C)
   osteoblasts        
  done clear
  D)
   neuron.
  done clear
  View Answer play_arrow

• question_answer111)  In the above question letter Y and M denote
  A)
   rennin and\[C{{a}^{++}}\]respectively
  done clear
  B)
  \[C{{a}^{++}}\]and rennin respectively
  done clear
  C)
   rennin,\[HCl\]and\[C{{a}^{++}}\]respectively
  done clear
  D)
   renin and\[C{{a}^{++}}\]respectively.
  done clear
  View Answer play_arrow

• question_answer112) Normally regeneration occurs in
  A)
   fish              
  done clear
  B)
   snakes
  done clear
  C)
   Planarian        
  done clear
  D)
   birds.
  done clear
  View Answer play_arrow

• question_answer113)  Salivation in mammals is under the control of
  A)
   medulla oblongata
  done clear
  B)
   mesencephalon
  done clear
  C)
   hypothalamus    
  done clear
  D)
   cerebellum.
  done clear
  View Answer play_arrow

• question_answer114) Hypophysial portal system is found in
  A)
   kidney           
  done clear
  B)
   liver
  done clear
  C)
   brain             
  done clear
  D)
   heart.
  done clear
  View Answer play_arrow

• question_answer115) Nerve fibres transmit the nerve message by means of
  A)
   chemical          
  done clear
  B)
   physical
  done clear
  C)
   electro-chemical  
  done clear
  D)
   electrical.
  done clear
  View Answer play_arrow

• question_answer116) The process by which most of the cartilaginous tissue is transformed into bones is
  A)
   endochondrial ossification
  done clear
  B)
   intermembranous ossification
  done clear
  C)
   calcification
  done clear
  D)
   none of the above.
  done clear
  View Answer play_arrow

• question_answer117) Megakaryocytes give rise to
  A)
   erythrocytes      
  done clear
  B)
   granulocytes
  done clear
  C)
   agranulocytes     
  done clear
  D)
   thrombocytes.
  done clear
  View Answer play_arrow

• question_answer118) Microfilaments have a diameter of
  A)
   less than 2 hn    
  done clear
  B)
   4-5 nm
  done clear
  C)
   4 - 6 nm        
  done clear
  D)
   10 nm.
  done clear
  View Answer play_arrow

• question_answer119) Liver in the body stores
  A)
   vit D              
  done clear
  B)
   vit E
  done clear
  C)
   vit K              
  done clear
  D)
   all of these.
  done clear
  View Answer play_arrow

• question_answer120) Sex chromosome remains in
  A)
   testes             
  done clear
  B)
   ovary
  done clear
  C)
   kidney and liver  
  done clear
  D)
   all of these.
  done clear
  View Answer play_arrow

• question_answer121) Digestion in Hydra is
  A)
   intracellular       
  done clear
  B)
   extracellular
  done clear
  C)
   both [a] and [b]   
  done clear
  D)
   none of these.
  done clear
  View Answer play_arrow

• question_answer122) The example of oviparous mammal is
  A)
   Talpa           
  done clear
  B)
   Erinaceous
  done clear
  C)
   Macropus        
  done clear
  D)
   Echidna.
  done clear
  View Answer play_arrow

• question_answer123) Mammalia is a
  A)
   category          
  done clear
  B)
   taxon
  done clear
  C)
   both [a] and [b ]
  done clear
  D)
   none of these.
  done clear
  View Answer play_arrow

• question_answer124) The barr body is observed in
  A)
   3%malebasophils
  done clear
  B)
   3% female basophils
  done clear
  C)
   3% male heutrophils
  done clear
  D)
   3% female neutrophils.
  done clear
  View Answer play_arrow

• question_answer125) During the mitosis of human He-La cells the longest-period is
  A)
   gap - 1 - phase  
  done clear
  B)
   S - phase
  done clear
  C)
   gap - 2 - phase  
  done clear
  D)
   M - phase.
  done clear
  View Answer play_arrow

• question_answer126) Which of the following factor is known as Christmas factor?
  A)
   factor VIII        
  done clear
  B)
   factor XII
  done clear
  C)
   factor IV          
  done clear
  D)
   factor IX.
  done clear
  View Answer play_arrow

• question_answer127) Which is most important in speciation?
  A)
   geographical isolation
  done clear
  B)
   reproductive isolation
  done clear
  C)
   ecological isolation
  done clear
  D)
   ethological isolation.
  done clear
  View Answer play_arrow

• question_answer128) The type of fossil where hard parts like bone or trunks of trees are preserved are known as
  A)
   petrifaction       
  done clear
  B)
   moulds
  done clear
  C)
   compression      
  done clear
  D)
   pseudofossil.
  done clear
  View Answer play_arrow

• question_answer129) The devonian period is considered to be as
  A)
   age of fishes     
  done clear
  B)
   age of amphibians
  done clear
  C)
   age of reptiles    
  done clear
  D)
   age of mammals.
  done clear
  View Answer play_arrow

• question_answer130) Which one of the following are homologous organs?
  A)
   wings of butterfly, flying fish and bird
  done clear
  B)
   tails of scorpion, bird and monkey
  done clear
  C)
   stings of bee, scorpion and fangs of snake
  done clear
  D)
   paddles of whale, arms of man, wings of bat.
  done clear
  View Answer play_arrow

• question_answer131) Pleiotropy is the term that refers to the situation in which a gene influences more than one trait. Its example is given by
  A)
   sickle cell anaemia
  done clear
  B)
   haemophilia
  done clear
  C)
   colourblindness  
  done clear
  D)
   only [a] and [b].
  done clear
  View Answer play_arrow

• question_answer132) If two persons with heterozygous A and B blood group marries, then possibility of genotypes in their progeny are
  A)
   only ii            
  done clear
  B)
   only W
  done clear
  C)
  \[{{I}^{A}}i\]and \[{{I}^{B}}i\]        
  done clear
  D)
   all of these.
  done clear
  View Answer play_arrow

• question_answer133) Restriction enzymes may be used for
  A)
   making reccmbinant DNA
  done clear
  B)
   gene mapping
  done clear
  C)
   diagnosis of genetic diseases
  done clear
  D)
   all of the above.
  done clear
  View Answer play_arrow

• question_answer134) Which of the following is incorrect?
  A)
   noise pollution does not leave any residue in the environment
  done clear
  B)
   noise pollution creates nervous disorders
  done clear
  C)
   plants are efficient absorbers of noise of low frequency
  done clear
  D)
   loss of hearing is a common disorder.
  done clear
  View Answer play_arrow

• question_answer135) Polyploidy can result from
  A)
   double fertilization
  done clear
  B)
   polyspermy
  done clear
  C)
   diploid gametes   
  done clear
  D)
   all of these.
  done clear
  View Answer play_arrow

• question_answer136) Nicotinic acid occurs in
  A)
   fresh tobacco leaves
  done clear
  B)
   fresh meat and eggs
  done clear
  C)
   fresh carrot and peaches
  done clear
  D)
   cereals and citrus fruits.
  done clear
  View Answer play_arrow

• question_answer137) An antiviral substance known to prevent the synthesis of new virus in the cell is known as
  A)
   transferon        
  done clear
  B)
   antibody
  done clear
  C)
   inferon           
  done clear
  D)
   interferon.
  done clear
  View Answer play_arrow

• question_answer138) Bacterial-pathogens such as Escherichia coli, Campylobacter and Salmonella are responsible for diseases like
  A)
   diarrhoea         
  done clear
  B)
   whooping cough
  done clear
  C)
   cholera           
  done clear
  D)
   diphtheria.
  done clear
  View Answer play_arrow

• question_answer139) The all familiar disease amoebiasis is caused by
  A)
   Wuchereria bancrofti
  done clear
  B)
   Ascaris lumbricoides
  done clear
  C)
   Taenia solium
  done clear
  D)
   Entamoeba histolytica.
  done clear
  View Answer play_arrow

• question_answer140) Right systemic arch is absent in
  A)
   reptiles           
  done clear
  B)
   birds
  done clear
  C)
   mammals         
  done clear
  D)
   none of these.
  done clear
  View Answer play_arrow

• question_answer141) Which is non-invasive technique of genetic counselling?
  A)
   amniocentesis
  done clear
  B)
   chorionic biopsy
  done clear
  C)
   foetal blood sampling
  done clear
  D)
   ultrasonography.
  done clear
  View Answer play_arrow

• question_answer142) Ratio of natality and mortality of a population expressed in percentage is
  A)
   vital index        
  done clear
  B)
   growth rate
  done clear
  C)
   survival rate      
  done clear
  D)
   biotic potential.
  done clear
  View Answer play_arrow

• question_answer143) Asbestos is an established mutagen. The target tissue of this is
  A)
   liver              
  done clear
  B)
   skin
  done clear
  C)
   urinary bladder   
  done clear
  D)
   lungs.
  done clear
  View Answer play_arrow

• question_answer144) The genotype of\[R{{h}^{+}}\]person could be
  A)
   \[rr\]               
  done clear
  B)
   \[RR\]
  done clear
  C)
   \[Rr\]               
  done clear
  D)
   both [b] and [c].
  done clear
  View Answer play_arrow

• question_answer145) Mental retardation is not related with
  A)
   trisomy 21
  done clear
  B)
   phenylalanine hydroxylase
  done clear
  C)
   myelinization of neuron
  done clear
  D)
   Y chromosome.
  done clear
  View Answer play_arrow

• question_answer146) Which pair is incorrect?
  A)
   haemophilia - X linked recessive
  done clear
  B)
   baldness - X linked dominance
  done clear
  C)
   colour blindness - X linked recessive
  done clear
  D)
   antler in deer- sex limited.
  done clear
  View Answer play_arrow

• question_answer147) Which group of following could be called immune disorder?
  A)
   SCID and diphtheria
  done clear
  B)
   AIDS and cholera
  done clear
  C)
   SCID and AIDS
  done clear
  D)
   hepatitis and leukemia.
  done clear
  View Answer play_arrow

• question_answer148) There are at least three methods of transmission available for AIDS i.e. sexual, perinatal and parenteral. Mother to child infection is called as
  A)
   parenteral        
  done clear
  B)
   perinatal
  done clear
  C)
   both [a] and [b]   
  done clear
  D)
   none of these.
  done clear
  View Answer play_arrow

• question_answer149) Recombination of the alleles of two genes A and B following crossing over will hypothetically result in four allelic recombinations. In the absence of crossing over the two parental combinations would be formed as
  A)
   AB and ab type
  done clear
  B)
   AB and Ab type
  done clear
  C)
   ab and aB type
  done clear
  D)
   AB, ab, Ab and aB.
  done clear
  View Answer play_arrow

• question_answer150) Which of the following statements is not correct for sickle cell anaemia?
  A)
   sixth amino acid (from NH^ terminus) of beta chain is glutamic acid
  done clear
  B)
   erythrocytes elongates and form sickle shaped cells
  done clear
  C)
   individual homozygous for haemoglobin S allele are\[Hb_{B}^{S}/Hb_{B}^{S}\]
  done clear
  D)
   beta chain of haemoglobin S contains valine
  done clear
  View Answer play_arrow

• question_answer151) In eukaryotic cells, the amount of basic proteins is often found to be
  A)
   more than the amount of DNA
  done clear
  B)
   less than the amount of DNA
  done clear
  C)
   equal to the amount of DNA
  done clear
  D)
   none of the above.
  done clear
  View Answer play_arrow

• question_answer152) The chemical structure of chlorophyll a varies from chlorophyll b5 due to difference between
  A)
  \[C{{H}_{3}}\]and \[{{C}_{2}}{{H}_{5}}\]    
  done clear
  B)
  \[C{{H}_{3}}\]and\[HCH=C{{H}_{2}}\]
  done clear
  C)
  \[C{{H}_{3}}\]and\[CHO\]    
  done clear
  D)
  \[CHO\]and\[CH=C{{H}_{2}}\]
  done clear
  View Answer play_arrow

• question_answer153) \[C{{O}_{2}}\]compensation point will be
  A)
   higher in\[{{C}_{3}}\]plants
  done clear
  B)
   higher in\[{{C}_{4}}\]plants
  done clear
  C)
   equal in\[{{C}_{3}}\]and\[{{C}_{4}}\]plants
  done clear
  D)
   zero for both type of plants.
  done clear
  View Answer play_arrow

• question_answer154) In order to reduce expenses over plantation for afforestation under the umbrella of social forestry, a system has been developed which includes forestry and agriculture. The system is termed as
  A)
   block system
  done clear
  B)
   selective harvest system
  done clear
  C)
   taungya system   
  done clear
  D)
   none of the above.
  done clear
  View Answer play_arrow

• question_answer155) Reindeer Moss, a very important producer in arctic zone and which constitute the starting point. of food chain in this region and also the staple food of reindeers belongs to
  A)
   pteridophyta      
  done clear
  B)
   green algae
  done clear
  C)
   lichens           
  done clear
  D)
   none of these.
  done clear
  View Answer play_arrow

• question_answer156) In photorespiration cell organelles involved are
  A)
   chloroplast, mitochondria and peroxisome
  done clear
  B)
   chloroplast, mitochondria and glyoxysome
  done clear
  C)
   chloroplast and mitochondria
  done clear
  D)
   chloroplast and golgi bodies.
  done clear
  View Answer play_arrow

• question_answer157) Which one of the following occur in radioactive fallout and behaves like calcium in biogeochemical cycling?
  A)
   cobalt-60        
  done clear
  B)
   cesium-137
  done clear
  C)
   strontium-90     
  done clear
  D)
   none of these.
  done clear
  View Answer play_arrow

• question_answer158) In electron transport chain,\[FAD{{H}_{2}}\]is oxidised to FAD, the electrons are passed to cytochrome proteins whereas hydrogen ions are released into
  A)
   matrix           
  done clear
  B)
   outer membrane
  done clear
  C)
   cytosol
  done clear
  D)
   primitochondrial space.
  done clear
  View Answer play_arrow

• question_answer159) In our biosphere, the most important and vast area is covered by hydrosphere. The hydrosphere has
  A)
   1.4 billion cubic km of water
  done clear
  B)
   1.4 million cubic km. of water
  done clear
  C)
   2.5 billion cubic km. of water
  done clear
  D)
   1.5 million cubic km. of water.
  done clear
  View Answer play_arrow

• question_answer160) Hill reaction was demonstrated
  A)
   in the absence of water
  done clear
  B)
   in the absence of carbon dioxide
  done clear
  C)
   in the presence of carbon dioxide
  done clear
  D)
   in the absence of a suitable electron acceptor.
  done clear
  View Answer play_arrow

• question_answer161) Minamata is a common disease which is prevalent in certain industrial areas of developed countries. The main cause of the disease is due to the pollution of heavy metals. Select the metals responsible for this disease
  A)
   cadmium        
  done clear
  B)
   lead
  done clear
  C)
   mercury         
  done clear
  D)
   magnesium.
  done clear
  View Answer play_arrow

• question_answer162) In a cell cycle the RNA synthesis, needed in protein synthesis, occurs in
  A)
   synthetic period
  done clear
  B)
   post-mitotic gap period
  done clear
  C)
   pre-mitotic gap period
  done clear
  D)
   prophase.
  done clear
  View Answer play_arrow

• question_answer163) Storage of enzymes for the digestion of cellular components, proteins and carbohydrates is carried out by        
  A)
   mitochondria     
  done clear
  B)
   lysosomes
  done clear
  C)
   centriole         
  done clear
  D)
   ribosomes.  
  done clear
  View Answer play_arrow

• question_answer164) In E. coli cell, according to operon theory, an operator gene combines with
  A)
   inducer gene to switch on structural gene transcription                                
  done clear
  B)
   represser protein to switch off structural gene transcription
  done clear
  C)
   regulator gene to switch on structural gene transcription
  done clear
  D)
   represser protein to switch on structural gene transcription.
  done clear
  View Answer play_arrow

• question_answer165) A pleiotropic gene is one which
  A)
   affects one character
  done clear
  B)
   affects more than one characters
  done clear
  C)
   affects more than ten characters
  done clear
  D)
   does not affect any character.
  done clear
  View Answer play_arrow

• question_answer166) If a sporangium develops from a single cell, the development of sporangium is known as
  A)
   heterosporangiate
  done clear
  B)
   homosporangiate
  done clear
  C)
   eusporangiate     
  done clear
  D)
   leptosporangiate.
  done clear
  View Answer play_arrow

• question_answer167) The ovule during its development undergoes \[90{}^\circ \]curvature bringing the micropyle and chalaza in a line but a right angle to the funicle. The ovule development conforms to
  A)
   anatropous       
  done clear
  B)
   atropus
  done clear
  C)
   campylotropous   
  done clear
  D)
   hemianatropous.
  done clear
  View Answer play_arrow

• question_answer168) Turpentine oil which is one of the most important forest product and is the base of varnish and paint industry is obtained from
  A)
   Cedrus           
  done clear
  B)
   Pinus
  done clear
  C)
   Abies
  done clear
  D)
   bye-product of petroleum.
  done clear
  View Answer play_arrow

• question_answer169) Chlorophylls and heme are closely related, however, differ because
  A)
   heme has iron and no phytol tail
  done clear
  B)
   heme has iron and a phytol tail
  done clear
  C)
   heme has magnesium and no phytol tail
  done clear
  D)
   heme has magnesium and a phytol tail.
  done clear
  View Answer play_arrow

• question_answer170) Photorespiration could easily be detected in
  A)
  \[{{C}_{3}}\]plants         
  done clear
  B)
  \[{{C}_{4}}\]plants
  done clear
  C)
   both in\[{{C}_{5}}\]and\[{{C}_{4}}\]
  done clear
  D)
   none of these.
  done clear
  View Answer play_arrow

• question_answer171) How many meiotic divisions would be required to produce 101 female gametophytes in an angiosperm?
  A)
   26               
  done clear
  B)
   101
  done clear
  C)
   127              
  done clear
  D)
   none of these.
  done clear
  View Answer play_arrow

• question_answer172) Elongation of internodes in grasses mainly occurs due to
  A)
   apical meristems  
  done clear
  B)
   vascular cambium
  done clear
  C)
   procambium      
  done clear
  D)
   intercalary meristem.
  done clear
  View Answer play_arrow

• question_answer173) Tapetal cells are characterized by the presence of
  A)
   dense cytoplasm and one nucleus
  done clear
  B)
   thin cytoplasm and many nuclei
  done clear
  C)
   dense cytoplasm and prominent nuclei
  done clear
  D)
   none of the above.
  done clear
  View Answer play_arrow

• question_answer174) Late blight of potato is caused by
  A)
   Alternaria solani
  done clear
  B)
   Phytophthora infestans
  done clear
  C)
   Phytophthora solani
  done clear
  D)
   Albugo Candida.
  done clear
  View Answer play_arrow

• question_answer175) A typical foliage leaf comprises
  A)
   hypopodium      
  done clear
  B)
   mesopodium
  done clear
  C)
   epipodium       
  done clear
  D)
   all of these.
  done clear
  View Answer play_arrow

• question_answer176) Intergeneric crosses are rarely successful. Which of the following may be used to achieve success in this regard?
  A)
   tissue culture
  done clear
  B)
   somatic hybridization
  done clear
  C)
   protoplast fusion
  done clear
  D)
   all of the above.
  done clear
  View Answer play_arrow

• question_answer177) For normal photosynthetic process in red algae, the pigments are
  A)
   phycocyanin and chlorophyll a
  done clear
  B)
   phycocyanin and chlorophyll b
  done clear
  C)
   phycoerythrin and chlorophyll a
  done clear
  D)
   phycoerythrin and chlorophyll b.
  done clear
  View Answer play_arrow

• question_answer178) The algae which occurs as parasite on the tea plants is
  A)
   Acetobtdaria
  done clear
  B)
   Cazilerpa
  done clear
  C)
   Harvcyella on red algae
  done clear
  D)
   Cephaleuros red rust of tea.
  done clear
  View Answer play_arrow

• question_answer179) The mycorrhizal fungi help its host by
  A)
   improving nutrient uptake
  done clear
  B)
   giving mechanical support
  done clear
  C)
   stimulating vegetative growth
  done clear
  D)
   none of the above.
  done clear
  View Answer play_arrow

• question_answer180) Okazaki fragments are produced during the synthesis of
  A)
   m-RNA          
  done clear
  B)
   protein
  done clear
  C)
   t-RNA           
  done clear
  D)
   DNA.
  done clear
  View Answer play_arrow

• question_answer181) All tailed bacteriophages contain
  A)
   double stranded DNA
  done clear
  B)
   double stranded RNA
  done clear
  C)
   single stranded DNA
  done clear
  D)
   single stranded RNA.
  done clear
  View Answer play_arrow

• question_answer182) The plants produced through anther culture may be
  A)
   haploid           
  done clear
  B)
   diploid
  done clear
  C)
   polyploid         
  done clear
  D)
   all of these.
  done clear
  View Answer play_arrow

• question_answer183) Which one of the following plants exhibits an example of anisophylly, where the different size of leaves are present in opposite phyllotaxy?
  A)
   Ranunculus aquatalis
  done clear
  B)
   goldfussia
  done clear
  C)
   Limnophila heterophyllum
  done clear
  D)
   Vallisneria spirilis.
  done clear
  View Answer play_arrow

• question_answer184) Chipko Andolan (movement) which was started in 1970 in GarhwaI/Himalayas (Gopeshwar) near Alaknanda River was for the first time initiated by
  A)
   Chander Prasad Bhat
  done clear
  B)
   Sunder Lal Bahuguna
  done clear
  C)
   Baba Amte
  done clear
  D)
   Vinoba Bhave.
  done clear
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• question_answer185) Apomixis is the production of a new plant through
  A)
   vegetative propagation
  done clear
  B)
   apogamy
  done clear
  C)
   diplospory        
  done clear
  D)
   all of these.
  done clear
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• question_answer186) The cell ca of 2-celled proembryo divides transversely, whereas the cell cb does not divide at all. Even if the suspensor is formed that too develops from the cell ca. The embryo develops from the cell ca or its derivatives. The embryo development conforms to
  A)
   onagrad type     
  done clear
  B)
   asterad type
  done clear
  C)
   caryophyllad type
  done clear
  D)
   chenopodiad type.
  done clear
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• question_answer187) During meiosis
  A)
   cytokinesis may take place
  done clear
  B)
   cytokinesis may not take place
  done clear
  C)
   cytokinesis may and may not take place
  done clear
  D)
   all of the above.
  done clear
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• question_answer188) If the decomposers stop functioning in an ecosystem, from functioning of ecosystem will be affected due to
  A)
   energy flow in the ecosystem will be blocked
  done clear
  B)
   cycling of mineral and material will be stopped
  done clear
  C)
   both [a] and [b]
  done clear
  D)
   nothing will happen on the functioning of ecosystem.
  done clear
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• question_answer189) Myrmecophily is a beneficial association between some flowering plants and
  A)
   mycoplasm       
  done clear
  B)
   bacteria
  done clear
  C)
   ants              
  done clear
  D)
   bacteria and virus.
  done clear
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• question_answer190) A distinct nucleus is generally present in each and every plant cell at meristematic stage. During differentiation the nucleus disorganises in which of the following?
  A)
   phloem parenchyma
  done clear
  B)
   companion cells
  done clear
  C)
   vessels          
  done clear
  D)
   none of these.
  done clear
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• question_answer191) If a fruit is developed from bicarpellary, syncarpous, superior ovary with parietal placentation and unilocular when young but becoming bilocular with age and also pod like in appearance is termed as
  A)
   lomentum        
  done clear
  B)
   silicula
  done clear
  C)
   siliqua           
  done clear
  D)
   cypsella.
  done clear
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• question_answer192) The male cone of Pinus is composed of microsporophylls. Each microsporophyll has
  A)
   one microsporangium on abaxial side
  done clear
  B)
   two microsporangia on adaxial side
  done clear
  C)
   two microsporangia on abaxial side
  done clear
  D)
   one microsporangium on adaxial side.
  done clear
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• question_answer193) Lencaena - a fast growing tree has been selected as a fuel yielding tree under the social forestry programme in rural area of our country. What is the common name of this tree?
  A)
   babul            
  done clear
  B)
   subabul
  done clear
  C)
   jojoba or Ho-hoba
  done clear
  D)
   none of these.
  done clear
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• question_answer194) One of the recently introduced new crop of oil seed in the deserts of India is Jojoba. Select the correct botanical name of this plant.
  A)
   Simmondsia chinensis    
  done clear
  B)
   Lencaena leucophlala
  done clear
  C)
   Dendroclamus
  done clear
  D)
   Dendrobium javanica.
  done clear
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• question_answer195) Which one of the following is M.F.R?
  A)
   timber           
  done clear
  B)
   lumber
  done clear
  C)
   pectin           
  done clear
  D)
   plywood.
  done clear
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• question_answer196) The pyramid ofbiomass would be inverted in
  A)
   grassland ecosystem
  done clear
  B)
   forest ecosystem
  done clear
  C)
   fresh water ecosystem
  done clear
  D)
   none of the above.
  done clear
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• question_answer197) Agar-Agar which is commonly used in microbiological studies and culture media is obtained from
  A)
   Gelidium
  done clear
  B)
   Laminaria
  done clear
  C)
   Laminaria and Polysiphonia
  done clear
  D)
   Batrachospernum.
  done clear
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• question_answer198) Which one of the following plant is commonly used as green manure?
  A)
   Crotalaria juncea
  done clear
  B)
   Dalbergia
  done clear
  C)
   Cassia           
  done clear
  D)
   Acacia.
  done clear
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• question_answer199) A natural phenomenon is commonly observed in lakes, ponds and ditches that there is a rich growth of algae and other microorganisms which consume much of the dissolved oxygen resulting the death of fish at night. This phenomenon is termed as
  A)
   litterization       
  done clear
  B)
   transmigration
  done clear
  C)
   eutrophication    
  done clear
  D)
   esturaization.
  done clear
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• question_answer200) A coordinated unit which controls the genetic expression is known as
  A)
   cistron           
  done clear
  B)
   recon
  done clear
  C)
   operon           
  done clear
  D)
   muton.
  done clear
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