Solved papers for Chhattisgarh PMT Chhattisgarh PMT Solved Paper-2008

done Chhattisgarh PMT Solved Paper-2008

  • question_answer1) A ball is thrown from a point with a speed \[{{v}_{0}}\]at an angle of projection \[\text{ }\!\!\theta\!\!\text{ }\text{.}\]From the same point and at the same instant, a person starts running with a constant speed \[\frac{{{v}_{0}}}{2}\]to catch the ball. Will the person be able to catch the ball? If yes, what should be the angle of projection?

    A) \[\text{Yes,6}{{\text{0}}^{\text{o}}}\]

    B) \[\text{Yes,}\,\text{3}{{\text{0}}^{\text{o}}}\]

    C) \[\text{No}\]

    D) \[\text{Yes,}\,{{45}^{\text{o}}}\]

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  • question_answer2) Spherical balls of radius R are falling in a viscous fluid of viscosity \[\eta \] with a velocity \[v.\] The retarding viscous force acting on the spherical ball is

    A) directly proportional to R but inversely proportional to \[v\]

    B) directly proportional to both radius R and velocity \[v\]

    C) inversely proportional to R but directly proportional to velocity \[v\]

    D) inversely proportional to R but directly proportional to velocity \[v\]

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  • question_answer3) Nickel shows ferromagnetic property at room temperature. If the temperature is increased beyond Curie temperature, then it will show

    A) paramagnetism

    B) anti-ferromagnetism

    C) no magnetic property

    D) diamagnetism

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  • question_answer4) In radioactive decay process, the negatively charged emitted \[\text{ }\!\!\beta\!\!\text{ -}\]particles are

    A) the electrons present inside the nucleus

    B) the electrons produced as a result of the decay of neutrons inside the nucleus

    C) the electrons produced as a result of collisions between atoms

    D) the electrons orbiting around the nucleus

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  • question_answer5) What is the value of inductance L for which the current is a maximum in a series LCR circuit with C = 10 uF and \[\omega \] = 1000 s-1 ?

    A) 100 mH

    B) 1 mH

    C) Cannot be calculated unless it is known

    D) 10 mH

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  • question_answer6) Three point charges \[\text{+}\,\text{q,}\,\text{-}\,\text{2}\,\text{q}\] and \[\text{+}\,\text{q}\] are placed at points \[(x=\,o\text{,}\,y=a,z=o\,)\] \[(x=\,o\text{,}\,y=0,z=o\,)\] and \[(x=\,a\text{,}\,y=0,z=o\,),\] respectively. The magnitude and direction of the electric dipole moment vector of this charge assembly are

    A) \[\sqrt{2}\,qa\] along \[+y\] direction

    B) \[\sqrt{2}\,qa\] along the line joining points \[(x=0,y=0,z=0)\] and \[(x=a,y=a,z=0)\]

    C) \[qa\] along the line joining points \[(x=0,y=0,z=0)\] and \[(x=a,y=a,z=0)\]

    D) \[\sqrt{2}qa\] along \[+x\] direction

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  • question_answer7) The maximum number of possible interference maxima for slit-separation equal to twice the wavelength in Young's double-slit experiment, is

    A) infinite

    B) five

    C) three

    D) zero

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  • question_answer8) Two spherical conductors B and C having equal radii and carrying equal charges in them repel each other with a force F when kept apart at some distance. A third spherical conductor having same radius as that of B but uncharged, is brought in contact with B, then brought in contact with C and finally removed away from both. The new force of repulsion between B and C is

    A) \[\frac{F}{4}\]

    B) \[\frac{3F}{4}\]

    C) \[\frac{F}{8}\]

    D) \[\frac{3F}{8}\]

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  • question_answer9) In gamma ray emission from a nucleus

    A) both the neutron number and the proton number change

    B) there is no change in the proton number and the neutron number

    C) only the neutron number changes

    D) only the proton number changes

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  • question_answer10) A particle starting from the origin (0, 0) moves in a straight line in the \[(x,y)\] plane. Its coordinates at a later time are \[(\sqrt{3},3).\] The path of the particle makes with the x-axis an angle of

    A) \[30{}^\circ \]

    B) \[45{}^\circ \]

    C) \[60{}^\circ \]

    D) \[0{}^\circ \]

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  • question_answer11) A wheel has angular acceleration of \[3.0\text{ }rad/{{s}^{2}}\] and an initial angular speed of 2.00 rad/s. In a time of 2 s it has rotated through an angle (in radian) of

    A) 6

    B) 10

    C) 12

    D) 4

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  • question_answer12) The resistance of an ammeter is 130 and its scale is graduated for a current upto 100 A. After an additional shunt has been connected to this ammeter it becomes possible to measure currents upto 750 A by this meter. The value of shunt resistance is

    A) 20\[\Omega \]

    B) 2\[\Omega \]

    C) 0.2\[\Omega \]

    D) 2\[\Omega \]

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  • question_answer13) Under the influence of a uniform magnetic field a charged particle is moving in a circle of radius R with constant speed v. The time period of the motion

    A) depends on \[v\] and not on \[R\]

    B) depends on both \[R\] and \[v\]

    C) is independent of both \[R\] and \[v\]

    D) depends on \[R\] and not on \[v\]

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  • question_answer14) The primary and secondary coils of a transformer have 50 and 1500 rums respectively. If the magnetic flux ^ linked with the primary coil is given by\[\phi ={{\phi }_{0}}+4t,\] where \[\phi \] is in we ber, t is time in second and \[{{\phi }_{0}}\] is a constant, the output voltage across die secondary coil is

    A) 90 V

    B) 120 V

    C) 220 V

    D) 30 V

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  • question_answer15) Two condensers, one of capacity C and the other of capacity \[\frac{C}{2'}\] are connected to a V volt battery, as shown. The work done in charging fully both a condensers is

    A) \[2C{{V}^{2}}\]

    B) \[\frac{1}{4}C{{V}^{2}}\]

    C) \[\frac{3}{4}C{{V}^{2}}\]

    D) \[\frac{1}{2}C{{V}^{2}}\]

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  • question_answer16) A uniform rod AB of length; and mass m is free to rotate about point A. The rod is released from rest in the horizontal position. Given that moment of inertia of the rod about A is \[\frac{m{{l}^{2}}}{3},\]the initial angular acceleration of the rod will be

    A) \[\frac{2g}{3l}\]

    B) \[mg\frac{l}{2}\]

    C) \[\frac{3}{2}gl\]

    D) \[\frac{3g}{2l}\]

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  • question_answer17) The frequency of a light wave in a material is \[2\times {{10}^{14}}\]Hz and wavelength is \[5000\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\]. The refractive index of material will be

    A) 1:40

    B) 1.50

    C) 3.00

    D) 1.33

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  • question_answer18) A car moves from X to Y with a uniform speed V y and returns to Y with a uniform speed \[{{v}_{d.}}\] The average speed for this round trip is T. The minimum time taken by the particle to travel half of the amplitude from the equilibrium position is

    A) \[\frac{2v{{  }_{d}}{{v}_{u}}}{{{v}_{d}}+{{v}_{u}}}\]                      

    B) \[\sqrt{v{{  }_{u}}{{v}_{d}}}\]

    C) \[\frac{v{{  }_{d}}{{v}_{u}}}{{{v}_{d}}+{{v}_{u}}}\]                         

    D) \[\frac{v{{  }_{u}}+{{v}_{d}}}{2}\]

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  • question_answer19) A particle executes simple harmonic scillation with an amplitude \[a\]. The period of oscillation is T. The minimum time taken by the particle to travel half of the amplitude from the equilibrium position is

    A) T/4

    B) T/8

    C) T/12

    D) T/2

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  • question_answer20) A block B is pushed momentarily along a horizontal surface with an initial velocity v. If u is the coefficient of sliding friction between B and the surface, block B will come to rest after a time

    A) \[\frac{v}{g\mu }\]

    B) \[\frac{g\mu }{v}\]

    C) \[\frac{g}{v}\]

    D) \[\frac{v}{g}\]

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  • question_answer21) Two radioactive substances A and B have decay constants \[5\lambda \] and \[\lambda \] respectively. At t = 0 they have the same number of nuclei. The ratio of number of nuclei of A to those of B will be \[\left( \frac{1}{e} \right)\] after a time interval

    A) \[\frac{1}{4\lambda }\]

    B) \[4\lambda \]

    C) \[2\lambda \]

    D) \[\frac{1}{2\lambda }\]

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  • question_answer22) A transformer is used to light a 100 W and 110 V lamp from a 220 V mains. If the main current is 0.5 A, the efficiency of the "transformer is approximately

    A) 30%

    B) 50%

    C) 90%

    D) 10%

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  • question_answer23) A charged particle (charge q) is moving in a circle of radius R with uniform speed v. The associated magnetic moment u is given by

    A) \[\frac{qvR}{2}\]

    B) \[qv{{R}^{2}}\]

    C) \[\frac{qv{{R}^{2}}}{2}\]

    D) \[qvR\]

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  • question_answer24) A steady current of 1.5 A flows through a copper voltameter for 10 min. If the electrochemical equivalent of copper is \[30\times {{10}^{-5}}g\,{{C}^{-1}},\]the mass of copper deposited on the electrode will be

    A) \[0.40\,g\]

    B) \[0.50\,g\]

    C) \[0.67\,g\]

    D) \[0.27\,g\]

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  • question_answer25) In a mass spectrometer used for measuring the masses of ions, the ions are initially accelerated by an electric potential V and then made to describe semicircular paths of radius R using a magnetic field B. If V and B are kept constant, the ratio \[\left( \frac{\text{charge}\,\text{on}\,\text{the}\,\text{ion}}{\text{mass}\,\text{of}\,\text{the}\,\text{ion}} \right)\]will be proportional to

    A) \[\frac{1}{R}\]

    B) \[\frac{1}{{{R}^{2}}}\]

    C) \[{{R}^{2}}\]

    D) \[R\]

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  • question_answer26) Three resistances P, Q, R each of \[2\,\Omega \] and an unknown resistance S form the four arms of a Wheat stone's bridge circuit. When a resistance of \[6\,\Omega \] is connected in parallel to S the bridge gets balanced. What is the value of S?

    A) \[2\,\Omega \]

    B) \[3\,\Omega \]

    C) \[6\,\Omega \]

    D) \[1\,\Omega \]

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  • question_answer27) Two satellites of earth, \[{{S}_{2.}}\] and \[{{S}_{1,}}\] are moving in the same orbit. The mass of Si is four times the mass of \[{{S}_{2}}\] Which one of the following statements is true ?

    A) The time period of \[{{S}_{1,}}\] is four times that of\[{{S}_{2}}\]

    B) The potential energies of earth and satellite in the two cases are equal

    C) \[{{S}_{1}}\]and \[{{S}_{2}}\] are moving with the same speed

    D) The kinetic energies of the two satellites are equal

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  • question_answer28) An observer moves towards a stationary source of sound, with a velocity one-fifth of the velocity of sound. What is the percentage increase in the apparent frequency ?

    A) Zero

    B) 6.5%

    C) 5%

    D) 20%

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  • question_answer29) A coil of inductance 300 m H and resistance \[2\,\Omega \] is connected to a source of voltage 2 V. The current reaches half of its steady state value in

    A) 0.05 s

    B) 0.1 s

    C) 0.15s

    D) 0.3s

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  • question_answer30) The refractive index of glass is 1.520 for red light and 1.525 for blue light. Let \[{{D}_{1}}\] and \[{{D}_{2}}\] be angles of minimum deviation for red and blue light respectively in a prism of this glass, then,

    A) \[{{D}_{1}}<{{D}_{2}}\]

    B) \[{{D}_{1}}={{D}_{2}}\]

    C) \[{{D}_{1}}\] can be less than or greater than \[{{D}_{2}}\] depending upon the angle of prism

    D) \[{{D}_{1}}>{{D}_{2}}\]

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  • question_answer31) A particle of mass 100 g is thrown vertically upwards with a speed of 5 m/s. The work done by the force of gravity during the time the particle goes up is

    A) -0.5 J

    B) -1.25J

    C) 1.25 J

    D) 0.5 J

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  • question_answer32) A mass of M kg is suspended by a weightless string. The horizontal force that is required to displace it until the string makes an angle of \[45{}^\circ \] with the initial vertical direction is

    A) \[Mg(\sqrt{2}+1)\]

    B) \[Mg\sqrt{2}\]

    C) \[\frac{Mg}{\sqrt{2}}\]

    D) \[Mg(\sqrt{2}-1)\]

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  • question_answer33) A force of \[\text{-F}\] \[\mathbf{\hat{k}}\] acts on 0, the origin of the coordinate system. The torque about the point \[(1,-1)\] is

    A) \[F\,(\mathbf{\hat{i}-\hat{j}})\]

    B) \[-F\,(\mathbf{\hat{i}}+\mathbf{\hat{j}})\]

    C) \[F\,(\mathbf{\hat{i}}+\mathbf{\hat{j}})\]

    D) \[-F\,(\mathbf{\hat{i}}-\mathbf{\hat{j}})\]

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  • question_answer34) If \[{{M}_{0}}\] is the mass of an oxygen isotope \[_{8}{{O}^{17}},\]\[{{M}_{P}}\] and \[{{M}_{n}}\] are the masses of a proton and a neutron, respectively, the nuclear binding energy of the isotope is

    A) \[({{M}_{0}}-8{{M}_{P}}){{c}^{2}}\]

    B) \[({{M}_{0}}-8{{M}_{P}}-9{{M}_{n}}){{c}^{2}}\]

    C) \[{{M}_{0}}{{c}^{2}}\]

    D) \[({{M}_{0}}-17{{M}_{n}}){{c}^{2}}\]

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  • question_answer35) A sound absorber attenuates the sound level by 20 dB. The intensity decreases by a factor of

    A) 1000

    B) 10000

    C) 10

    D) 100

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  • question_answer36) Which of the following parameters does not characterise the thermodynamic state of matter?

    A) Temperature

    B) Pressure

    C) Work

    D) Volume

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  • question_answer37) A charged oil drop is suspended in uniform field of \[3\times {{10}^{4}}V/m\] so that it neither falls nor rises. The charge on the drop will be (Take the mass of the charge \[=9.9\times {{10}^{-15}}kg\] and \[g=10m/{{s}^{2}}\])

    A) \[3.3\times {{10}^{-18}}C\]

    B) \[3.2\times {{10}^{-18}}C\]

    C) \[1.6\times {{10}^{-18}}C\]

    D) \[4.8\times {{10}^{-18}}C\]

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  • question_answer38) A vertical spring with force constant k is fixed on a table A ball of mass m at a height h above the free upper end of the spring falls vertically on the spring, so that the spring is compressed by a distance d. The net work done in the process is

    A) \[mg(h+d)+\frac{1}{2}k{{d}^{2}}\]

    B) \[mg(h+d)-\frac{1}{2}k{{d}^{2}}\]

    C) \[mg(h-d)-\frac{1}{2}k{{d}^{2}}\]

    D) \[mg(h-d)+\frac{1}{2}k{{d}^{2}}\]

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  • question_answer39) Dimensions of resistance in an electrical circuit in terms of dimension of mass M, of length L, of time T and of current \[I,\] would be

    A) \[\text{ }\!\![\!\!\text{ M}{{\text{L}}^{\text{2}}}{{\text{T}}^{-3}}{{\text{I}}^{\text{-1}}}\text{ }\!\!]\!\!\text{ }\]

    B) \[\text{ }\!\![\!\!\text{ M}{{\text{L}}^{\text{2}}}{{\text{T}}^{-2}}\text{ }\!\!]\!\!\text{ }\]

    C) \[\text{ }\!\![\!\!\text{ M}{{\text{L}}^{\text{2}}}{{\text{T}}^{-1}}{{\text{I}}^{-1}}\text{ }\!\!]\!\!\text{ }\]

    D) \[\text{ }\!\![\!\!\text{ M}{{\text{L}}^{\text{2}}}{{\text{T}}^{-3}}{{\text{I}}^{-2}}\text{ }\!\!]\!\!\text{ }\]

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  • question_answer40) An alpha nucleus of energy \[\frac{1}{2}m{{v}^{2}}\] bombards a heavy nuclear target of charge Ze. Then the distance of closest approach for the alpha nucleus will be proportional to

    A) v2

    B) 1 /m

    C) 1/v4

    D) 1/Ze

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  • question_answer41) The work of 146 kJ is performed in order to compress one kilo mole of a gas adiabatically and in this process the temperature of the gas increases by \[7{}^\circ C\]. The gas is\[\text{(R=8}\text{.3J}\,\text{mo}{{\text{l}}^{\text{-1}}}{{\text{K}}^{\text{01}}}\text{)}\]

    A) diatomic

    B) triatomic

    C) a mixture of monoatomic and diatomic

    D) monoatomic

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  • question_answer42) If \[{{g}_{E}}\] and \[{{g}_{M}}\] are the accelerations due to gravity on the surfaces of the earth and the moon respectively and if Millikan's oil drop experiment could be performed on the two surfaces, one will find the ratio \[\frac{\text{electronic}\,\text{charge}\,\text{on}\,\text{the}\,\text{moon}}{\text{electronic}\,\text{charge}\,\text{on}\,\text{the}\,\text{earth}}\]to be

    A) \[1\]

    B) \[\operatorname{zero}\]

    C) \[\frac{{{g}_{E}}}{{{g}_{M}}}\]

    D) \[\frac{{{g}_{M}}}{{{g}_{E}}}\]

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  • question_answer43) Diwali rocket is ejecting 50 g of gases/s at a velocity of 400 m/s. The accelerating force or the rocket will be

    A) 22 dyne

    B) 20 N

    C) 20 dyne

    D) 100 N

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  • question_answer44) A frame made of metallic wire enclosing a surface area A is covered with a soap film. If the area of the frame of metallic wire is reduced by 50%,the energy of the soap film will be changed by

    A) 100%

    B) 75%

    C) 50%

    D) 25%

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  • question_answer45) Mercury boils at \[367{}^\circ C\]. However, mercury thermometers are made such that they can measure temperature up to \[500{}^\circ C\]. This is done by

    A) maintaining vacuum above mercury column in the stem of the thermometer

    B) filling nitrogen gas at high pressure above the mercury column

    C) filling oxygen gas at high pressure above the mercury column

    D) filling nitrogen gas at low pressure above the mercury column

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  • question_answer46) In a laboratory four convex lenses \[{{L}_{1}},{{L}_{2}},{{L}_{3}}\] and \[{{L}_{4}}\] of focal lengths 2, 4, 6 and 8 cm, respectively are available. Two of these lenses form a telescope of length 10 cm and magnifying power 4. The objective and eye lenses are respectively

    A) \[{{L}_{2}},{{L}_{3}}\]

    B) \[{{L}_{1}},{{L}_{4}}\]

    C) \[{{L}_{1}},{{L}_{2}}\]

    D) \[{{L}_{4}},{{L}_{1}}\]

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  • question_answer47) A symmetric double convex lens is cut in two equal parts by a plane perpendicular to the principal axis. If the power of the original lens is 4D, the power of a cut lens will be

    A) 2D

    B) 3D

    C) 4D

    D) 5D

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  • question_answer48) Two non-ideal batteries are connected in parallel. Consider the following statements. The equivalent emf is smaller than either of the two emf s. (ii) The equivalent internal resistance is smaller than either of the two internal resistances.

    A) Both (i) and (ii) are correct

    B) (i) is correct but (ii) is wrong

    C) (iii) is correct but (i) is wrong

    D) Both (i) and (ii) are wrong

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  • question_answer49) For a metallic wire, the ratio\[\frac{V}{i}\](V= applied potential difference and i = current flowing) is

    A) independent of temperature

    B) increases as the temperature rises

    C) decreases as the temperature rises

    D) increases or decreases as temperature rises depending upon the metal

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  • question_answer50) The potential energy of a molecule on the surface of a liquid compared to one inside the liquid is

    A) zero

    B) lesser

    C) equal

    D) greater

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  • question_answer51) Which of the following is not correct?

    A) Hydrolysis of \[NC{{l}_{3}}\] gives \[N{{H}_{3}}\]and \[HOCl\]

    B) \[N{{H}_{3}}\]is less stable than \[P{{H}_{3}}\]

    C) \[N{{H}_{3}}\] is a weak reducing reagent compared to \[P{{H}_{3}}\]

    D) Nitric oxide in solid state exhibits diamagnetic property

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  • question_answer52) \[Si{{O}_{2}}\] is reacted with sodium carbonate. What is the gas liberated?

    A) \[CO\]

    B) \[{{O}_{2}}\]

    C) \[C{{O}_{2}}\]

    D) \[{{O}_{3}}\]

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  • question_answer53) The compounds formed at anode in the electrolysis of an aqueous solution of potassium acetate, are

    A) \[{{C}_{2}}{{H}_{6}}\]and \[C{{O}_{2}}\]

    B) \[{{C}_{2}}{{H}_{4}}\] and \[C{{O}_{2}}\]

    C) \[C{{H}_{4}}\]and \[{{H}_{2}}\]

    D) \[C{{H}_{4}}\]and \[C{{O}_{2}}\]

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  • question_answer54) Which of the following is not correct regarding the elecolytic preparation of \[{{H}_{2}}{{O}_{2}}\]?

    A) Lead is used as cathode

    B) 50% \[{{H}_{2}}S{{O}_{4}}\]is used

    C) Hydrogen is liberated at anode

    D) Sulphuric acid undergoes oxidation

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  • question_answer55) Which of the following is correct?

    A) The pH of one litre solution containing \[0.49g\]of \[{{H}_{2}}S{{O}_{4}}\]is \[2.0\]

    B) The conjugate base of \[{{H}_{2}}S\] is \[{{S}^{2-}}\]

    C) \[B{{F}_{3}}\]is a Lewis base

    D) Phenolphthalein is colourless in basic medium

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  • question_answer56) Which of the following is correct?

    A) Catalyst undergoes permanent chemical change

    B) Particle size of solute in true solution is \[{{10}^{-3}}m\]

    C) Starch solution is a hydrosol

    D) Hydrolysis of liquid ester in the presence of mineral add is an example of heterogeneous catalysis reactions

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  • question_answer57) In an oxidation-reduction reaction, \[MnO_{4}^{-}\] ion is converted to \[M{{n}^{2+}}\]What is the number of equivalents of \[KMn{{O}_{4}}\] \[(mol.\text{ }wt.=158)\]present in \[250\text{ }mL\]of \[0.04\text{ }M\]\[KMn{{O}_{4}}\] solution?

    A) \[0.02\]

    B) \[0.05\]

    C) \[0.04\]

    D) \[0.07\]

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  • question_answer58) Which of the following reagents converts both acetaldehyde and acetone to alkanes?

    A) \[Ni/{{H}_{2}}\]

    B) \[LiAl{{H}_{4}}\]

    C) \[{{I}_{2}}/NaOH\]

    D) \[Zn\,\,Hg/conc.\,HCl\]

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  • question_answer59) The heat of formation of \[(Co)g\] and \[C{{O}_{2}}(g)\] are \[\Delta H=-110\] and \[\Delta H=-393kJ\,\,mo{{l}^{-1}}\]respectively. What is the heat of reaction \[(\Delta H)'\] (in\[kJ\text{ }mo{{1}^{-1}}\]) for the following reaction? \[CO(g)+\frac{1}{2}{{O}_{2}}(g)\xrightarrow{{}}C{{O}_{2}}(g)\]

    A) \[-504\]

    B) \[-142.5\]

    C) \[-283\]

    D) \[504\]

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  • question_answer60) What is the wavelength (in m) of a particle of mass \[6.62\times {{10}^{-29}}g\]moving with a velocity of \[{{10}^{3}}\text{ }m{{s}^{-1}}\] ?

    A) \[6.62\times {{10}^{-4}}\]

    B) \[6.62\times {{10}^{-3}}\]

    C) \[{{10}^{-5}}\]

    D) \[{{10}^{5}}\]

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  • question_answer61) What is the electrode potential (in V) of the following electrode at\[{{25}^{o}}C\]? \[N{{i}^{2+}}(0.1M)|Ni(s)\] (Standard reaction potential of \[N{{i}^{2+}}|Ni\] is\[-0.25V,\] \[\frac{2,303RT}{F}=0.06\])

    A) \[-0.28V\]

    B) \[-0.34V\]

    C) \[-0.82V\]

    D) \[-0.22V\]

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  • question_answer62) What is the equation for the equilibrium constant \[({{K}_{c}})\] for the following reaction? \[\frac{1}{2}A(g)+\frac{1}{3}B(g)\frac{2}{3}C(g)\]

    A) \[{{K}_{c}}=\frac{{{[A]}^{1/2}}{{[B]}^{1/3}}}{{{[C]}^{3/2}}}\]

    B) \[{{K}_{c}}=\frac{{{[C]}^{3/2}}}{{{[A]}^{2}}{{[B]}^{3}}}\]

    C) \[{{K}_{c}}=\frac{{{[C]}^{2/3}}}{{{[A]}^{1/2}}{{[B]}^{1/3}}}\]

    D) \[{{K}_{c}}=\frac{{{[C]}^{2/3}}}{{{[A]}^{1/2}}+{{[B]}^{1/3}}}\]

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  • question_answer63) Which of the following can give a Grignard reagent when reacted with magnesium in dry ether?

    A) \[{{C}_{2}}{{H}_{6}}\]

    B) \[{{C}_{2}}{{H}_{5}}Cl\]

    C) \[{{C}_{2}}{{H}_{5}}OH\]

    D) \[{{C}_{2}}{{H}_{5}}CN\]

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  • question_answer64) Which of the following is not correct?

    A) \[Al\] reacts with \[NaOH\]and liberate \[{{H}_{2}}\]

    B) \[AlC{{l}_{3}}\] is a Lewis acid

    C) \[Al\] is used in the manufacture of electrical cables

    D) \[NaOH\]is used during Hall's process of purification of bauxite

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  • question_answer65) A \[0.5\text{ }g/L\]solution of glucose is found to be isotonic with a \[2.5\text{ }g/L\]solution of an organ:: compound. What will be the molecular weight of that organic compound?

    A) \[300\]

    B) \[600\]

    C) \[900\]

    D) \[200\]

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  • question_answer66) t-butyl chloride preferably undergo hydrolysis by

    A) \[{{S}_{N}}1\] mechanism

    B) \[{{S}_{N}}2\] mechanism

    C) Any of [a] and [b]

    D) None of the above

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  • question_answer67) Adipic acid on heating form





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  • question_answer68) To dissolve argentite ore which of the following is used?

    A) \[Na[Ag{{(CN)}_{2}}]\]

    B) \[NaCN\]

    C) \[NaCl\]

    D) \[HCl\]

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  • question_answer69) If 50% of a radioactive substance dissociates in \[\text{15 }min,\]then the time taken by substance to dissociate 99% will be

    A) \[50\text{ }min\]

    B) \[100\text{ }min\]

    C) \[99\text{ }min\]

    D) \[150\text{ }min\]

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  • question_answer70) \[H-O-H\] bond angle in \[{{H}_{2}}O\] is \[{{104.5}^{o}}\] and not \[{{109}^{o}}28'\]because of

    A) lone pair-lone pair repulsion

    B) lone pair-bond pair repulsion

    C) bond pair-bond pair repulsion

    D) high electronegativity of oxygen

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  • question_answer71) The reaction,\[{{C}_{6}}{{H}_{5}}CHO+C{{H}_{3}}COO{{C}_{2}}{{H}_{5}}\xrightarrow{{}}\] \[{{C}_{6}}{{H}_{5}}CH=CHCOO{{C}_{2}}{{H}_{5}},\] is called

    A) Benzoin condensation

    B) Claisen condensation

    C) Cannizaro's reaction

    D) Perkin reaction

    View Answer play_arrow
  • question_answer72) The best method to separate the mixture of ortho and para nitrophenol \[(1:1)\] is

    A) vaporisation

    B) colour spectrum

    C) distillation

    D) crystallization

    View Answer play_arrow
  • question_answer73) lodoform gives a precipitate with \[AgN{{O}_{3}}\]on heating but chloroform does not because

    A) \[C-I\] bond in iodoform is weak and \[C-Cl\] bond in chloroform is strong

    B) chloroform is covalent

    C) iodoform is ionic

    D) None of the above

    View Answer play_arrow
  • question_answer74) What are the values of \[{{n}_{1}}\] and \[{{n}_{2}}\] respectively for \[{{H}_{\beta }}\] line in the Lyman series of hydrogen atomic spectrum 44?

    A) 3 and 5

    B) 2 and 3

    C) 1 and 3

    D) 2 and 4

    View Answer play_arrow
  • question_answer75) The homologue of ethyne is

    A) \[{{C}_{2}}{{H}_{2}}\]

    B) \[{{C}_{2}}{{H}_{6}}\]

    C) \[{{C}_{3}}{{H}_{8}}\]

    D) \[{{C}_{3}}{{H}_{4}}\]

    View Answer play_arrow
  • question_answer76) A \[0.1\] aqueous solution of a weak acid is 2% ionised. If the ionic product of water is \[1\times {{10}^{-4}},\]the \[[O{{H}^{-}}]\] is

    A) \[5\times {{10}^{-12}}M\]

    B) \[2\times {{10}^{-3}}M\]

    C) \[1\times {{10}^{-14}}M\]

    D) None of these

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  • question_answer77) Which of the following does not have coordinate bond?'

    A) \[S{{O}_{2}}\]

    B) \[HN{{O}_{3}}\]

    C) \[{{H}_{2}}S{{O}_{3}}\]

    D) \[HN{{O}_{2}}\]

    View Answer play_arrow
  • question_answer78) The total number of orbitals in the fifth energy level is

    A) \[5\]

    B) \[10\]

    C) \[18\]

    D) \[25\]

    View Answer play_arrow
  • question_answer79) The most probable velocity (in cm/s) of hydrogen molecule at \[{{27}^{o}}C\]will be

    A) \[19.3\times {{10}^{4}}\]

    B) \[17.8\times {{10}^{4}}\]

    C) \[24.93\times {{10}^{9}}\]

    D) \[17.8\times {{10}^{8}}\]

    View Answer play_arrow
  • question_answer80) Element with atomic number 38, belongs to

    A) II A group and 5th period

    B) II A group and 2nd period

    C) V A group and 2nd period

    D) III A group and 5th period

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  • question_answer81) In an oxidation reduction reaction, dichromate \[(C{{r}_{2}}O_{7}^{2-})\] ion is reduced to \[C{{r}^{3+}}\] ion. The equivalent weight of \[{{K}_{2}}C{{r}_{2}}{{O}_{7}}\] in this reaction is

    A) \[\frac{molecular\,weight}{3}\]

    B) \[\frac{molecular\,weight}{6}\]

    C) \[\frac{molecular\,weight}{1}\]

    D) \[\frac{molecular\,weight}{2}\]

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  • question_answer82) What is the wave number of 4th line in Bahner series of hydrogen spectrum? \[(R=1,09,677c{{m}^{-1}})\]

    A) \[24,630\,c{{m}^{-1}}\]

    B) \[24,360\text{ }c{{m}^{-1}}\]

    C) \[24,730\text{ }c{{m}^{-1}}~\]

    D) \[24,372\text{ }c{{m}^{-1}}\]

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  • question_answer83) \[9.2\text{ }g\]\[{{N}_{3}}{{O}_{4}}\] is heated in a \[1I,\] vessel till equilibrium state is established \[{{N}_{2}}{{O}_{4}}(g)2N{{O}_{2}}(g)\] In equilibrium state 50% \[{{N}_{2}}{{O}_{4}}\] was dissociated, equilibrium constant will be (mol. wt. of \[{{N}_{2}}{{O}_{4}}=92\])

    A) \[0.1\]

    B) \[0.4\]

    C) \[0.3\]

    D) \[0.2\]

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  • question_answer84) Disperse phase and dispersion medium in butter are respectively

    A) solid and liquid

    B) liquid and solid

    C) liquid and liquid

    D) solid and solid

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  • question_answer85) Which of the following carbonates decomposes readily at low temperatures ?

    A) \[N{{a}_{2}}C{{O}_{3}}\]

    B) \[{{K}_{2}}C{{O}_{3}}\]

    C) \[L{{i}_{2}}C{{O}_{3}}\]

    D) \[R{{b}_{2}}C{{O}_{3}}\]

    View Answer play_arrow
  • question_answer86) The atomic number of an element 'M' is 26. How many electrons are present in the M-shell of the element in its \[{{M}^{3+}}\] state?

    A) \[11\]

    B) \[15\]

    C) \[14\]

    D) \[13\]

    View Answer play_arrow
  • question_answer87) In which of the following pairs, both molecules possess dipole moment?

    A) \[C{{O}_{2}},S{{O}_{2}}\]

    B) \[BC{{l}_{3}},PC{{l}_{3}}\]

    C) \[{{H}_{2}}O,S{{O}_{2}}\]

    D) \[C{{O}_{2}},C{{S}_{2}}\]

    View Answer play_arrow
  • question_answer88) Match the following

    Set - I Set - II
    (A) 10 vol \[{{H}_{2}}{{O}_{2}}\] 1. perhydrol
    (B) 20 vol \[{{H}_{2}}{{O}_{2}}\] 2. \[5.358N\]
    (C) 30 vol \[{{H}_{2}}{{O}_{2}}\] 3. \[1.78SM\]
    (D) 40 vol \[{{H}_{2}}{{O}_{2}}\] 4. \[3.03%\]
    The correct match is

    A) \[A-4,B-3,C-2,D-1\]

    B) \[A-1,B-2,C-3,D-4\]

    C) \[A-1,B-3,C-2,D-4\]

    D) \[A-4,B-2,C-3,D-1\]

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  • question_answer89) During, acetylation of amines, what is replaced by acetyl group?

    A) Hydrogen atom attached to nitrogen atom

    B) One or more hydrogen atoms attached to carbon atom

    C) One 0'- more hydrogen atoms attached to nitrogen atom

    D) Hydrogen atoms attached to either carbon atom or nitrogen atom

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  • question_answer90) Which is used in alcoholic beverages?

    A) Methanol

    B) Ethanol

    C) Phenol

    D) Glycerol

    View Answer play_arrow
  • question_answer91) Oxidation state of oxygen in \[{{F}_{2}}O\] is

    A) \[+1\]

    B) \[-1\]

    C) \[+2\]

    D) \[-2\]

    View Answer play_arrow
  • question_answer92) In III group precipitation, \[N{{H}_{4}}Cl\] is added. before adding \[N{{H}_{4}}OH\] to

    A) decrease cone. of \[O{{H}^{-}}\]

    B) prevent interference of \[PO_{4}^{3-}\]

    C) increase cone. of \[C{{l}^{-}}\]

    D) increase cone. of \[O{{H}^{-}}\] ion

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  • question_answer93) Steel is heated to below red heat and then, cooled slowly. The process refers to

    A) hardening

    B) annealing

    C) tempering

    D) nitriding

    View Answer play_arrow
  • question_answer94) Which one of the following reactions is called Rosemond reaction?

    A) Aldehydes are reduced to alcohols

    B) Acids are converted to acid chlorides

    C) Alcohols are reduced to hydrocarbons

    D) Acid chlorides are reduced to aldehydes

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  • question_answer95) IUPAC name of\[C{{H}_{3}}-C{{H}_{2}}-\underset{C{{H}_{3}}}{\mathop{\underset{|}{\mathop{\underset{C{{H}_{2}}}{\mathop{\underset{|}{\mathop{C}}\,}}\,}}\,}}\,H-\underset{C{{H}_{3}}}{\mathop{\underset{|}{\mathop{C}}\,}}\,=C{{H}_{2}}\] is

    A) \[2-methyl-3-ethyl-1-pentene\]

    B) \[3-ethyl-4-methyl-4-pentene\]

    C) \[3-ethyl-2-methyl-1-pentene\]

    D) \[3-methyl-2-ethyl-1-pentene\]

    View Answer play_arrow
  • question_answer96) Which of the following dissolves in water but does not give any oxyacid solution?

    A) \[S{{O}_{2}}\]

    B) \[O{{F}_{2}}\]

    C) \[SC{{l}_{4}}\]

    D) \[S{{O}_{3}}\]

    View Answer play_arrow
  • question_answer97) The formula of Calgon, used for water softening is

    A) \[N{{a}_{2}}[N{{a}_{4}}{{(P{{O}_{3}})}_{6}}]\]

    B) \[N{{a}_{4}}[N{{a}_{2}}{{(P{{O}_{3}})}_{6}}]\]

    C) \[N{{a}_{4}}[N{{a}_{2}}{{(P{{O}_{3}})}_{6}}]\]

    D) \[N{{a}_{4}}[N{{a}_{4}}{{(P{{O}_{4}})}_{6}}]\]

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  • question_answer98) A mixture of amylose and amylopectin is called

    A) lactose

    B) starch

    C) cellulose

    D) sucrose

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  • question_answer99) Methyl alcohol when reacted with carbon monoxide using cobalt or rhodium as catalyst, compound 'A' is formed. On heating 'A' with \[HI\] in the presence of red phosphorus as catalyst 'B' is formed. Identify 'B'.

    A) \[C{{H}_{3}}COOH\]

    B) \[C{{H}_{3}}-CHO\]

    C) \[C{{H}_{3}}.C{{H}_{2}}.I\]

    D) \[C{{H}_{3}}-C{{H}_{3}}\]

    View Answer play_arrow
  • question_answer100) One gas bleaches the colour of flowers by reduction and another gas by oxidation. The gases respectively are

    A) \[S{{O}_{2}}\]and \[C{{l}_{2}}\]

    B) \[CO\]and \[C{{l}_{2}}\]

    C) \[N{{H}_{3}}\]and \[S{{O}_{2}}\]

    D) \[{{H}_{2}}S\]and \[B{{r}_{2}}\]

    View Answer play_arrow
  • question_answer101) The trisomy for 21st chromosome is called

    A) Down's syndrome

    B) Turner's syndrome

    C) Sickle cell anaemia

    D) Klinefelter's syndrome

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  • question_answer102) 'Mammalian thymus' is mainly concerned with

    A) regulation of body temperature

    B) regulation of body growth

    C) immunological functions

    D) secretion of thyrotropin

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  • question_answer103) Which of the following is the largest gland in an adult roan ?

    A) Thymus

    B) Liver

    C) Thyroid

    D) Pancreas

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  • question_answer104) In Pheretima, septa are absent between which segments ?

    A) 3/4 and 9/10

    B) 4/5 and 8/9

    C) 5/6 and 7/8

    D) 7/8 and 6/7

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  • question_answer105) During emergency which of the following hormone is secreted?

    A) Aldosterone

    B) Thyroxine

    C) Adrenalin

    D) Calcitonin

    View Answer play_arrow
  • question_answer106) In which of the following animals, respiration occurs without any respiratory organ ?

    A) Prog

    B) Fish

    C) Cockroach

    D) Earthworm

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  • question_answer107) In cockroach, larval and nymphal characters are maintained by

    A) ecdysone

    B) salivary glands

    C) parotid gland

    D) juvenile hormone

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  • question_answer108) Which of the following is a transparent tissue?

    A) Tendon

    B) Fibrous cartilage

    C) Hyaline cartilage

    D) All of these

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  • question_answer109) Rh factor is present in

    A) all vertebrates

    B) all mammals

    C) all reptiles

    D) man and rhesus monkey only

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  • question_answer110) In rabbit, end of a long bone is connected in another by

    A) tendon

    B) ligaments

    C) muscle

    D) cartilage

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  • question_answer111) Which of the following cell type is capable of giving rise to other cell types in sponges ?

    A) Thesocytes

    B) Pinacocytes

    C) Cnidocytes

    D) Archaeocytes

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  • question_answer112) Thigmotaxis is not shown by

    A) Paramecium

    B) Amoeba

    C) Ascaris

    D) Hydra

    View Answer play_arrow
  • question_answer113) Which is correctly matched?

    A) Apiculture-Honey bee

    B) Pisciculture-Silk moth

    C) Sericulture-Fish

    D) Aquaculture-Mosquito

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  • question_answer114) Changes that allow the conversion of larva into adult, is called

    A) metagenesis

    B) alternation

    C) metamorphosis

    D) metastasis

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  • question_answer115) Animals having a built in thermostat to maintain constant body temperature are known as

    A) bio thermic

    B) poikilothermic

    C) oligothermic

    D) home othermic

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  • question_answer116) The intermediate host of Schistosoma is

    A) snail

    B) mosquito

    C) housefly

    D) sheep

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  • question_answer117) The islets of Langerhans are found in

    A) pancreas

    B) stomach

    C) liver

    D) alimentary canal

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  • question_answer118) The vitamin which is essential for blood dotting is

    A) vitamin-A

    B) vitamin-B

    C) vitamin-C

    D) vitamin-K

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  • question_answer119) The female genital pore of Pheretima posthuma located upon the segment

    A) 14th

    B) 16th

    C) 18th

    D) 15th

    View Answer play_arrow
  • question_answer120) Polyp phase is absent in

    A) Hydra

    B) Aureh'a

    C) Physalia

    D) Obelia

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  • question_answer121) In frog heart, there are cardiac muscles which consists of fibres called

    A) Purkinje fibres

    B) myonemes

    C) telodendria

    D) columnae camae

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  • question_answer122) Malpighian tubules are

    A) excretory organs of insects

    B) excretory organs of frog

    C) respiratory organs of insects

    D) endocrine glands of insects

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  • question_answer123) LH and FSH are collectively called

    A) oxytocin

    B) somatotropins

    C) luteotropic

    D) gonadotropins

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  • question_answer124) Who is known as 'father of Endocrinology' ?

    A) RH Whittaker

    B) Pasteur

    C) Einthoven

    D) Thomas Addison

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  • question_answer125) Which of the following provides most evident proof of evolution?

    A) Fossils

    B) Morphology

    C) Embiyo

    D) Vestigial organs

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  • question_answer126) In Mollusca, eye is present over a stalk, called

    A) ostracum

    B) operculum

    C) ommatophores

    D) osphradium

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  • question_answer127) Among the following, colonial Insects are

    A) locusts

    B) mosquitoes

    C) white ants

    D) bed bug

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  • question_answer128) In Ascaris, the coelom is

    A) schizocoelom

    B) pseudocoelom

    C) true coelom

    D) haemocoelom

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  • question_answer129) Turbellarians are free living

    A) nematodes

    B) cestodes

    C) flat worms

    D) trematodes

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  • question_answer130) The characteristic larva of phylum Coelenterata' is

    A) planula

    B) cysticercus

    C) rhabdiform

    D) wriggler

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  • question_answer131) In rabbit, head of epididymis present at the head of the testis is called

    A) vas deferens

    B) cauda epididymis

    C) gubernaculum

    D) caput epididymis

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  • question_answer132) Tendons and ligaments are specialized types of

    A) nervous tissue

    B) muscular tissue

    C) epithelial tissue

    D) connective tissue

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  • question_answer133) In blood, in transported majorly as

    A) sodium carbonate

    B) carboxyhaemoglobin

    C) bicarbonate

    D) as such

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  • question_answer134) Animals undergoes inactive stage during winter, is known as

    A) aestivation

    B) hibernation

    C) adaptation

    D) acclimatization

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  • question_answer135) Kupffer cells are present in

    A) liver

    B) small intestine

    C) pancreas

    D) thyroid gland

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  • question_answer136) The embryo at 16 celled stage is known as

    A) morula

    B) gastrula

    C) blastula

    D) blast o mere

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  • question_answer137) Contractile vacuole in protozoan Amoeba is meant for

    A) respiration

    B) excretion

    C) locomotion

    D) osmoregulation

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  • question_answer138) Which of the following is important for muscle contraction and nerve impulse transmission?

    A) ions

    B) ions

    C) The Both [a] and [b]

    D) ions

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  • question_answer139) Which of these statements about Huntington's disease is true?

    A) Genetic tests to detect the presence of the allele responsible for Huntington's disease do not exist at this time

    B) The onset of Huntington's disease is typically between birth and three year of age

    C) There is currently no effective treatment of Huntington's disease

    D) Huntington's disease is caused by the expression of a recessive allele

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  • question_answer140) Which one is component of Ornithine cycle?

    A) Ornithine, citrulline and alanine

    B) Ornithine, citrulline and arginine

    C) Amino acid are not used

    D) Ornithine, citrulline and fumaric acid

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  • question_answer141) Chromosome complement with 2n - 1 is called

    A) monosomy

    B) nullisomy

    C) trisomy

    D) tetrasomy

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  • question_answer142) Which of the following is not vestigial in man?

    A) Tail vertebrae

    B) Nails

    C) Nictitating membrane

    D) Vermiform appendix

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  • question_answer143) Small fish get stuck near the bottom of a shark and derives its nutrition from it. This kind of association is called as

    A) antibiosis

    B) commensalism

    C) predation

    D) parasitism

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  • question_answer144) The group of Anamniota includes

    A) reptiles and birds

    B) birds and mammals

    C) fishes an amphibians

    D) reptiles and mammals

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  • question_answer145) The excretory material of bony fish is

    A) urea

    B) protein

    C) ammonia

    D) amino acid

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  • question_answer146) The leucocytes contain which of the following in large quantity?

    A) Basophils

    B) Neutrophils

    C) Eosinophils

    D) Monocytes

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  • question_answer147) During inspiration, the diaphragm

    A) expands

    B) shows no change

    C) contracts and flattens

    D) relaxes to become dome-shaped

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  • question_answer148) The function of pineal body is to

    A) lighten the skin colours

    B) control sexual behavior

    C) regulates the period of puberty

    D) All of the above

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  • question_answer149) Synsacrum of fowl consists of about

    A) 29 vertebrae

    B) 3 vertebrae

    C) 16 vertebrae

    D) single vertebrae

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  • question_answer150) Which of the following was formed in S Miller's experiment?

    A) Amino acids

    B) Nucleic acids

    C) UV radiations

    D) Microspheres

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  • question_answer151) Jumping genes in maize were discovered by

    A) Hugo de Vries

    B) Barbara McClintock

    C) T H Morgan

    D) Mendel

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  • question_answer152) Streptomycin is obtained from

    A) Streptomyces griseus

    B) S. aureofaciens

    C) S. venezuelae

    D) S. ramosus

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  • question_answer153) Binomial system of nomenclature was given by

    A) Julian Huxley

    B) Bentham and Hooker

    C) Linnaeus

    D) Casper Bauhin

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  • question_answer154) Indusium is found in

    A) algae

    B) ferns

    C) moss

    D) Cycas

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  • question_answer155) The vacuole is lined by a membrane called

    A) to no plast

    B) jacket

    C) cell membrane

    D) to neoplasm

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  • question_answer156) Agar-agar is obtained from

    A) Chlorella

    B) Spirogyra

    C) Ulothrix

    D) Gelidium

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  • question_answer157) DNA element with ability to change position'is called

    A) cistron

    B) transposon

    C) intron

    D) recon

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  • question_answer158) Initiation codon is

    A) UUU

    B) UGA

    C) AUG

    D) UAG

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  • question_answer159) DNA multiplication is called

    A) translation

    B) replication

    C) transduction

    D) transcription

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  • question_answer160) Duramen is present in

    A) inner region of secondary wood

    B) part of sap wood

    C) outer region of secondary wood

    D) region of pericycle

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  • question_answer161) In plants, water supply is due to.

    A) osmosis

    B) imbibition

    C) guttation

    D) adhesion force

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  • question_answer162) Most of the economically important fibre yielding plants belong to family

    A) Malvaceae

    B) Solanaceae

    C) Cruciferae

    D) Poaceae

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  • question_answer163) Paraffin wax is

    A) ester

    B) acid

    C) monohydric alcohol

    D) cholesterol

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  • question_answer164) Which is always present in photochemical smog?

    A) \[{{O}_{3}}\]

    B) \[C{{O}_{2}}\]

    C) \[S{{O}_{2}}\]

    D) \[C{{H}_{4}}\]

    View Answer play_arrow
  • question_answer165) In cell cycle, during which phase, chromosomes are arranged in equatorial plate?

    A) Metaphase

    B) Anaphase

    C) Telophase

    D) Prophase

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  • question_answer166) The soil which is transported by wind is known as

    A) colluvial

    B) eolian

    C) aluvial

    D) glacial soil

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  • question_answer167) Spindle fibre is made up of

    A) tubulin

    B) humulin

    C) intermediate filament

    D) Hagellin

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  • question_answer168) Lichen is the pioneer vegetation on which succession?

    A) Hydrosere

    B) Lithosere

    C) Psammosere

    D) Xerosere

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  • question_answer169) Law of limiting factors was given by

    A) Leibig

    B) Blackman

    C) Calvin

    D) Amon

    View Answer play_arrow
  • question_answer170) In Pinus, male cone bears a large number of

    A) ligules

    B) anthers

    C) micro-sporophylls

    D) mega-sporophylls

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  • question_answer171) Induction of flowering by low temperature treatment is

    A) vernalization

    B) cryobiology

    C) photoperiodism

    D) pruning

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  • question_answer172) Decomposers are

    A) auto tiophs

    B) auto heterotrophs

    C) organotrophs

    D) heterotrophs

    View Answer play_arrow
  • question_answer173) Cleavage polyembryony occurs in

    A) Pinus

    B) Mini Cycas

    C) Cycas

    D) Ephedra

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  • question_answer174) Edible part of mushroom is

    A) basidiocarp

    B) secondary mycelium

    C) primary mycelium

    D) tertiary mycelium

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  • question_answer175) Which of the following plant product is the hardest?

    A) Lignin

    B) Cutin

    C) Suberin

    D) Sporopollenin

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  • question_answer176) Calyptra is derived from

    A) archegonia

    B) capsule

    C) antheridia

    D) columella

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  • question_answer177) Clamp connections' are observed in

    A) Basidiomycetes

    B) Zygomycetes

    C) Ascomycetes

    D) Oomycetes

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  • question_answer178) Leaf abscission is caused by

    A) ABA

    B) cytokinin

    C) auxin

    D) gibberellins

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  • question_answer179) What is the main cause for the extinction of some species in tropical forest?

    A) Deforestation

    B) Afforestation

    C) Pollution

    D) Soil erosin

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  • question_answer180) Most accepted theory for ascent of sap is

    A) capillarity theory

    B) root pressure theory

    C) pulsation theory

    D) transpiration pull

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  • question_answer181) Which enzyme converts glucose into alcohol?

    A) Zymase

    B) Diastase

    C) Invertase

    D) Lipase

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  • question_answer182) Which of the following is not the feature of gymnosperms?

    A) Parallel venation

    B) Perennial plants

    C) Distinct branches (long and short branches)

    D) Xylem with vessels

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  • question_answer183) The presence of diversity at the junction of territories of two different habitats is known as

    A) bottle neck effect

    B) edge effect

    C) junction effect

    D) Pasteur effect

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  • question_answer184) In which form does the food transported in plants?

    A) Sucrose

    B) Fructose

    C) Glucose

    D) Lactose

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  • question_answer185) Lady finger belongs to family

    A) Malvaceae

    B) Cucurbitaceae

    C) Liliaceae

    D) Brassicaceae

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  • question_answer186) In Cycas, pollination takes place in

    A) 3 celled stage

    B) 4 celled stage

    C) 2 celled stage

    D) 1 celled stage

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  • question_answer187) The bioassay of auxin is

    A) avena curvature test

    B) callus formation

    C) culture of fungus

    D) seed dormancy

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  • question_answer188) Energy transferred from one trophic level to another is

    A) 5%

    B) 10%

    C) 15%

    D) 20%

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  • question_answer189) A eukaryotic gene contains two kinds of base sequences. Which of these plays an important role in protein synthesis?

    A) Introns

    B) Exons

    C) Both [a] and [b]

    D) None of these

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  • question_answer190) The number of hydrogen bonds between adenine and thymine in a DNA molecule is

    A) two

    B) three

    C) four

    D) eight

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  • question_answer191) L-shaped chromosomes are also called

    A) acrocentric

    B) telocentric

    C) sub-metacentric

    D) None of these

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  • question_answer192) Which of the following is/are grouped under phanerogams?

    A) Angiosperms

    B) Gymnosperms

    C) Pteridophytes

    D) Both [a] and [b]

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  • question_answer193) A bacterium divides after every 35 min., if a culture containing 105 cells per mL is grown, then cell concentration per mL after 175 min. will be

    A) \[175\times {{10}^{5}}\]

    B) \[125\times {{10}^{5}}\]

    C) \[48\times {{10}^{5}}\]

    D) \[32\times {{10}^{5}}\]

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  • question_answer194) Double fertilization occurs among

    A) algae

    B) bryophytes

    C) angiosperms

    D) gymnosperms

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  • question_answer195) Which of the following theory gives the latest explanation for the closure of stomata?

    A) ABA theory

    B) Munch theory

    C) Starch glucose theory

    D) Active K4 transport theory

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  • question_answer196) Biological concept of species is mainly based on

    A) reproductive isolation

    B) morphological features only

    C) methods of reproduction only

    D) morphology and methods of reproduction

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  • question_answer197) In the treatment of waste water discharge, which treatment stage involves biological treatment ?

    A) Primary treatment

    B) Secondary treatment

    C) Tertiary treatment

    D) Reverse osmosis stage

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  • question_answer198) Nucellus forms which of the following part of fruit ?

    A) Seed coat

    B) Perisperm

    C) Seed

    D) Raphe

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  • question_answer199) If root of a flowering plant has 24 chromosomes, then its gamete has how many chromosomes ?

    A) 24

    B) 12

    C) 4

    D) 8

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  • question_answer200) \[{{A}_{0}}\] layer is rich in

    A) minerals

    B) humus

    C) litter

    D) None of these

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