Solved papers for BCECE Medical BCECE Medical Solved Papers-2010

done BCECE Medical Solved Papers-2010

  • question_answer1) Find the dimensions of electric permittivity.

    A) \[[{{A}^{2}}{{M}^{-1}}{{L}^{-3}}{{T}^{4}}]\]

    B) \[[{{A}^{2}}{{M}^{-1}}{{L}^{-3}}{{T}^{0}}]\]

    C) \[[A{{M}^{-1}}{{L}^{-3}}{{T}^{4}}]\]

    D) \[[{{A}^{2}}{{M}^{0}}{{L}^{-3}}{{T}^{4}}]\]

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  • question_answer2) A ship of mass \[3\times {{10}^{7}}\] kg, initially at rest, is pulled by a force of \[5\times {{10}^{4}}\] N through a distance of 3 m. Assuming that the resistance due to water is negligible, the speed of the ship is

    A) 1.5 m/s

    B) 60 m/s

    C) 0.1 m/s

    D) 5 m/s

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  • question_answer3) If the external forces acting on a system have zero resultant, the centre of mass

    A) may move but not accelerate

    B) may accelerate

    C) must not move

    D) None of the above

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  • question_answer4) An object is placed on the surface of a smooth inclined plane of inclination \[\theta \]. It takes time t to reach the bottom. If the same object is allowed to slide down a rough inclined plane of inclination 9, it takes time nt to reach the bottom, where n is a number greater than 1. The coefficient of friction u is given by

    A) \[\mu =\tan \theta \left( 1-\frac{1}{{{n}^{2}}} \right)\]

    B) \[\mu =\cos \theta \left( 1-\frac{1}{{{n}^{2}}} \right)\]

    C) \[\mu =\tan \theta \sqrt{1-\frac{1}{\sqrt{{{n}^{2}}}}}\]

    D) \[\mu =\cot \theta \sqrt{1-\frac{1}{{{n}^{2}}}}\]

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  • question_answer5) A 500 kg horse pulls a cart of mass 1500 kg along a level road with an acceleration of 1\[m/{{s}^{2}}\]. If the coefficient of sliding friction is 0.2, then the horizontal force exerted by the earth on the horse is

    A) 300kg-wt

    B) 400 kg-wt

    C) 500 kg-wt

    D) 600 kg-wt

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  • question_answer6) A spring is held compressed so that its stored energy is 2.4 J. Its ends are in contact with masses 1 g and 48 g placed on a frictionless table. When the spring is released, the heavier mass will acquire a speed of

    A) \[\frac{2.4}{49}m{{s}^{-1}}\]

    B) \[\frac{2.4\times 48}{49}m{{s}^{-1}}\]

    C) \[\frac{{{10}^{3}}}{7}cm{{s}^{-1}}\]

    D) \[\frac{{{10}^{6}}}{7}cm{{s}^{-1}}\]

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  • question_answer7) Two simple pendulums first [A] of bob mass \[{{M}_{1}}\] and length \[{{L}_{1}}\], second of bob mass \[{{M}_{2}}\]and length \[{{L}_{2}}\]. \[{{M}_{1}}={{M}_{2}}\] and \[{{L}_{1}}=2{{L}_{2}}\]. If the vibrational energy of both is same. Then which of the following is correct?

    A) Amplitude of B is greater than that of A

    B) Amplitude of B is smaller than that of A

    C) Amplitude will be same

    D) None of the above

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  • question_answer8) Which logic gate is represented by the following combination of logic gates?

    A) OR

    B) NAND

    C) AND

    D) NOR

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  • question_answer9) A body of mass m is situated on the earth in the gravitational field of sun. For the body to escape from the gravitation pull of the solar system the body must be imparted an escape velocity of (assume earth to be stationary)

    A) 11.2 km/s

    B) 22.4 km/s

    C) 33.6 km/s

    D) 42 km/s

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  • question_answer10) Find the lifting force of a 4 kg cork life belt in sea water, if the densitites of cork and sea water are \[0.2\times {{10}^{3}}kg/{{m}^{3}}\] and \[1.3\times {{10}^{3}}kg/{{m}^{3}}\] respectively.

    A) 163 N

    B) 273 N

    C) 119N

    D) 298 N

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  • question_answer11) Nitrogen \[({{N}_{2}})\] is in equilibrium state at T = 421 K. The value of most probable speed, \[{{v}_{mp}}\] is

    A) 400 m/s

    B) 421 m/s

    C) 500 m/s

    D) 600 m/s

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  • question_answer12) The temperature at which the velocity of oxygen will be half that of hydrogen at NTP is

    A) \[{{1092}^{o}}C\]

    B) \[{{1492}^{o}}C\]

    C) 273 K

    D) \[{{819}^{o}}C\]

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  • question_answer13) Two sound waves, each of amplitude A and frequency\[\omega \], superpose at a point with phase difference of \[\frac{\pi }{2}\]. The amplitude and frequency of the resultant wave are respectively

    A) \[\frac{A}{\sqrt{2}},\frac{\omega }{2}\]

    B) \[\frac{A}{\sqrt{2}},\omega \]

    C) \[\sqrt{2A},\,\,\frac{\omega }{2}\]

    D) \[\sqrt{2A},\,\,\omega \]

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  • question_answer14) A source emits electromagnetic waves of wavelength 3 m. One beam reaches the observer directly and other after reflection from a water surface, travelling 1.5 m extra distance and with intensity reduced to (1/4) as compared to intensity due to direct beam alone. The resultant intensity will be

    A) (1/4) fold

    B) (3/4) fold

    C) (5/4) fold

    D) (9/4) fold

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  • question_answer15) A square of side 3 cm is located at a distance 25 cm from a concave mirror of focal length 10 cm. The centre of square is at the axis of the mirror and the plane is normal to axis of mirror. The area enclosed by the image of the square is

    A) 4 \[c{{m}^{2}}\]

    B) 6 \[c{{m}^{2}}\]

    C) 16 \[c{{m}^{2}}\]

    D) 36 \[c{{m}^{2}}\]

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  • question_answer16) A charge q is placed at the centre of the line joining two equal charges Q. The system of the three charges will be in equilibrium if q is equal

    A) \[-\frac{Q}{2}\]

    B) \[-\frac{Q}{4}\]

    C) \[+\frac{Q}{4}\]

    D) \[+\frac{Q}{2}\]

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  • question_answer17) The numerical value of charge on either plate of capacitor C shown in figure

    A) CE

    B) \[\frac{CE{{R}_{1}}}{{{R}_{1}}+r}\]

    C) \[\frac{CE{{R}_{2}}}{{{R}_{2}}+r}\]

    D) \[\frac{CE{{R}_{1}}}{{{R}_{2}}+r}\]

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  • question_answer18) A proton enters a magnetic field of flux density 1.5 \[Wb/{{m}^{2}}\] with a speed of \[2\times {{10}^{7}}\] m/s at angle of \[{{30}^{o}}\] with the field. The force on a proton will be

    A) \[0.24\times {{10}^{-12}}N\]

    B) \[2.4\times {{10}^{-12}}\text{ }N\]

    C) \[24\times {{10}^{12}}N~\]

    D) \[0.024\times {{10}^{12}}\text{ }N\]

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  • question_answer19) Two long straight wires are set parallel to each other at separation rand each carries a current\[i\] in the same direction. The strength of the magnetic field at any point midway between the two wires is

    A) \[\frac{{{\mu }_{0}}i}{\pi r}\]

    B) \[\frac{2{{\mu }_{0}}i}{\pi r}\]

    C) \[\frac{{{\mu }_{0}}i}{2\pi r}\]

    D) zero

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  • question_answer20) The work done in turning a magnet of magnetic moment M by an angle of \[{{90}^{o}}\] from the meridian is n times the corresponding work done to turn it through an angle of \[{{60}^{o}}\]

    A) \[n=\frac{1}{2}\]

    B) \[n=2\]

    C) \[n=\frac{1}{4}\]

    D) \[n=1\]

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  • question_answer21) An inductive coil has a resistance of \[100\,\,\Omega \]. When an AC signal of frequency 1,000 Hz is applied to the coil, the voltage leads the current by \[{{45}^{o}}\]. The inductance of the coil is

    A) \[\frac{1}{10\pi }\]

    B) \[\frac{1}{20\pi }\]

    C) \[\frac{1}{40\pi }\]

    D) \[\frac{1}{60\pi }\]

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  • question_answer22) An inductor of 1 H is connected across a 220 V. 50 Hz supply. The peak value of the current is approximately

    A) 0.5 A

    B) 0.7 A

    C) 1A

    D) 1.4 A

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  • question_answer23) The figure shows an equiconvex lens of focal length\[f\]. If the lens is cut along PQ, the focal length of each half will be

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

    B) \[f\]

    C) \[2f\]

    D) \[4f\]

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  • question_answer24) Light of two different frequencies whose photons have energies 1 eV and 2.5 eV successively illuminate a metal of work function 0.5 eV. The ratio of the maximum speeds of the emitted electrons will be

    A) 1 : 5

    B) 1 : 4

    C) 1 : 2

    D) 1 : 1

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  • question_answer25) An electron jumps from the first excited state to the ground state of hydrogen atom. What will be the percentage change in the speed of electron?

    A) 25%

    B) 50%

    C) 100%

    D) 200%

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  • question_answer26) The mutual inductance of a pair of coils, each of N turns, is M henry. If a current of \[i\] ampere in one of the coils is brought to zero in t second, the emf induced per turn in the other coil, in volt will be

    A) \[\frac{Mi}{t}\]

    B) \[\frac{NMi}{t}\]

    C) \[\frac{MN}{it}\]

    D) \[\frac{Mi}{Nt}\]

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  • question_answer27) A body falls from rest. In the last second of its fall it covers half of the total distance. If g is 9.8\[m/{{s}^{2}}\], then the total time of its fall is (in second)

    A) 2

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

    C) \[2-\sqrt{2}\]

    D) \[2\pm \sqrt{2}\]

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  • question_answer28) A force \[\vec{F}=a\hat{i}+3\hat{j}+6\hat{k}\] is acting at a point\[\vec{r}=2\hat{i}-6\hat{j}-12\hat{k}\]. The value of a for which angular momentum is conserved is

    A) zero

    B) 1

    C) -1

    D) 2

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  • question_answer29) A wooden block is floating in a liquid 50% of its volume inside the liquid when the vessel is stationary. Percentage of volume immersed when the vessel moves upwards with an acceleration \[a=g/3\] is

    A) 30%

    B) 50%

    C) 60%

    D) 67%

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  • question_answer30) Two resistors \[400\,\,\Omega \]. And \[800\,\,\Omega \] are connected in series with a 6 V battery. The potential difference measured by voltmeter of\[10\,\,\Omega \] across \[400\,\,\Omega \] resistor is

    A) 2 V

    B) 1.95V

    C) 3.8V

    D) 4V

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  • question_answer31) An astronomical telescope in normal adjustment receives light from a distant source S the tube length is now decreased slightly, then

    A) no image will be formed

    B) a virtual image of S will be formed at a finite distance

    C) a large, real image of S will be formed behind the eye-piece, far away from it

    D) a small, real image of S will be formed behind the eye-piece close to it

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  • question_answer32) The potential difference in volt across the resistance ^3 in the circuit shown in figure, is \[({{R}_{1}}=15\,\,\Omega ,{{R}_{2}}=15\,\Omega ,\,{{R}_{3}}=30\,\Omega ,\,{{R}_{4}}=35\,\Omega )\]

    A) 5

    B) 7.5

    C) 15

    D) 12.5

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  • question_answer33) The ratio of molecular masses of two radioactive substances is 3/2 and the ratio of their decay constants is 4/3. Then, the ratio of their initial activities per mole will be

    A) 2

    B) 4/3

    C) 8/9

    D) 9/8

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  • question_answer34) The resultant of two forces P and Q is of magnitude P. If P be doubled, the resultant will be inclined to Q at an angle

    A) \[{{0}^{o}}\]

    B) \[{{30}^{o}}\]

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

    D) \[{{90}^{o}}\]

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  • question_answer35) A person is at a distance x from a bus when the bus begins to move with a constant acceleration a. What is the minimum velocity with which the person should run towards the bus so as to catch it?

    A) \[2ax\]

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

    C) \[ax\]

    D) \[\sqrt{ax}\]

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  • question_answer36) A car is travelling with linear velocity v on a circular road of radius r. If it is increasing its speed at the rate of a \[m/{{s}^{2}}\], then the resultant acceleration will be

    A) \[\left( \frac{{{v}^{2}}}{r}+a \right)\]

    B) \[{{\left( \frac{{{v}^{2}}}{{{r}^{2}}}+a \right)}^{1/2}}\]

    C) \[{{\left( \frac{{{v}^{4}}}{{{r}^{2}}}+{{a}^{2}} \right)}^{1/2}}\]

    D) \[{{\left( \frac{{{v}^{2}}}{{{r}^{2}}}-{{a}^{2}} \right)}^{1/2}}\]

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  • question_answer37) A body of mass 10 kg at rest explodes into two pieces of masses 7 kg and 3 kg. If the total increase in kinetic energy due to explosion is 1680 J, the magnitude of their relative velocity in m/s, after explosion is

    A) 40

    B) 50

    C) 70

    D) 80

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  • question_answer38) The moment of inertia of a body about a given axis is 1.2 kg \[{{m}^{2}}\]. Initially the body is at rest. In order to produce a rotational kinetic energy of 1500 J, an angular acceleration of 25 \[rad/{{s}^{2}}\]must be applied about that axis for a duration of

    A) 4 s

    B) 2 s

    C) 8 s

    D) 10 s

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  • question_answer39) Steel and aluminium wires have equal resistances and masses. Which of the wires is longer and how many times? (Given, densities of steel and aluminium are \[7.8\times {{10}^{3}}kg\,{{m}^{3}}\] and \[2.7\times {{10}^{3}}kg\,{{m}^{-3}}\] and their resistivities are \[01.5\,\mu \Omega -m\] and \[00.28\,\mu \Omega -m\] respectively)

    A) The aluminium wire is 3.9 times longer

    B) The aluminium wire is 1.3 times longer

    C) The aluminium wire is 2.6 times longer

    D) The steel wire is 3.9 times longer

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  • question_answer40) Two cells of emf s \[{{E}_{1}}\] and \[{{E}_{2}}({{E}_{1}}>{{E}_{2}})\] are connected as shown in figure. When a potentiometer is connected between A and B, the balancing length of the potentiometer wire is 300 cm. On connecting the same potentiometer between A and C, the F balancing length is 100 cm. The ratio \[\frac{{{E}_{1}}}{{{E}_{2}}}\] is

    A) 3 : 1

    B) 1 : 3

    C) 2 : 3

    D) 3 : 2

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  • question_answer41) In hydrogen atom the electron is making \[6.6\times {{10}^{15}}\] rev/s around the nucleus of radius 0.53 \[\overset{o}{\mathop{A}}\,\]. The magnetic field produced at the centre of the orbit is nearly

    A) 0.12 \[Wb/{{m}^{2}}\]

    B) 1.2 \[Wb/{{m}^{2}}\]

    C) 12 \[Wb/{{m}^{2}}\]

    D) 120 \[Wb/{{m}^{2}}\]

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  • question_answer42) An AC source is 120 V-60 Hz. The value of voltage after \[\frac{1}{720}\] from start will be

    A) 20.2 V

    B) 42.4 V

    C) 84.8 V

    D) 106.8 V

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  • question_answer43) The energy difference between the first two levels of hydrogen atom is 10.2 eV. For another element of atomic number 10 and mass number 20, this will be

    A) 1020 eV

    B) 2040 eV

    C) 0.51 eV

    D) 0.102 eV

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  • question_answer44) The following equation represents induced transmutation \[_{4}B{{e}^{9}}_{2}H{{e}^{4}}{{\xrightarrow{{}}}_{6}}{{C}^{12}}+X\] In this equation, X represents

    A) one \[{{\beta }^{-}}\]particle

    B) \[\alpha \]-particle

    C) a positron

    D) a neutron

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  • question_answer45) The masses of neutron and proton are 1.0087 and 1.0073 amu respectively. If the neutrons and protons combine to form helium nucleus of mass 4.0015 amu the binding energy of the helium nucleus will be

    A) 28.4 MeV

    B) 20.8 MeV

    C) 27.3 MeV

    D) 14.2 MeV

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  • question_answer46) The activity of a radioactive sample is measured as 9750 count/min at t = 0 and 975 count/min att = 5min. The decay constant is nearly

    A) 0.922 \[{{\min }^{-1}}\]

    B) 0.691 \[{{\min }^{-1}}\]

    C) 0.461 \[{{\min }^{-1}}\]

    D) 0.230 \[{{\min }^{-1}}\]

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  • question_answer47) Light of wavelength \[\lambda \], strikes a photoelectric surface and electrons are ejected with an energy E. If E is to be increased to exactly twice its original value, the wavelength changes to\[\lambda \], where

    A) \[\lambda \] is less than \[\frac{\lambda }{2}\]

    B) \[\lambda \] is greater than \[\frac{\lambda }{2}\]

    C) \[\lambda \] is greater than \[\frac{\lambda }{2}\] but less than A-

    D) \[\lambda \] is exactly equal to \[\frac{\lambda }{2}\]

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  • question_answer48) Three point masses, each of mass m are placed at the comers of an equilateral triangle of side cl The moment of inertia of this system about an axis along one side of the triangle is

    A) 3 \[m{{a}^{2}}\]

    B) \[m{{a}^{2}}\]

    C) 3 \[m{{a}^{2}}\]

    D) 3 \[m{{a}^{2}}\]

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  • question_answer49) A pipe opened at both ends produces a note of frequency \[{{f}_{1}}\]. When the pipe is kept with \[\frac{3}{4}\] th of its length in water, it produces a note of frequency \[{{f}_{2}}\]. The ratio \[\frac{{{f}_{1}}}{{{f}_{2}}}\] is

    A) \[\frac{3}{4}\]

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

    C) \[\frac{1}{2}\]

    D) 2

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  • question_answer50) A solenoid is 1.5 m long and its inner diameter is 4.0 cm. It has 3 layers of windings of 1000 turns each and carries a current of 2.0 A. The magnetic flux for a cross-section of the solenoid is nearly

    A) \[4.1\times {{10}^{-5}}\] Wb

    B) \[5.2\times {{10}^{-5}}\] Wb

    C) \[6.31\times {{10}^{-3}}\] Wb

    D) \[2.5\times {{10}^{-7}}\] Wb

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  • question_answer51) How many moles of helium gas occupy 22.4 L at\[{{0}^{o}}C\] and 1 atm pressure?

    A) 0.11

    B) 1.11

    C) 0.90

    D) 1.0

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  • question_answer52) The compound which contains both ionic and covalent bond

    A) KCl

    B) KCN

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

    D) \[{{H}_{2}}\]

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  • question_answer53) The following is endothermic reaction

    A) Decomposition of water

    B) Conversion of graphite to diamond

    C) Dehydrogenation of ethane to ethylene

    D) All of the above

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  • question_answer54) A saturated solution of \[A{{g}_{2}}S{{O}_{4}}\] is \[2.5\times {{10}^{-2}}M\]. The value of its solubility product is

    A) \[62.5\times {{10}^{-6}}\]

    B) \[6.25\times {{10}^{-4}}\]

    C) \[15.625\times {{10}^{-6}}\]

    D) \[3.125\times {{10}^{-6}}\]

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  • question_answer55) The enthalpies of combustion of carbon, and carbon monoxide are -393.5 and \[-285\,\,kJ\,\,mo{{l}^{-1}}\] respectively. The enthalpy of formation of carbon monoxide per mole is

    A) 110.5 kJ

    B) 676.5 kJ

    C) -676.5 kJ

    D) -110.5 kJ

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  • question_answer56) 1 g ice absorbs 335 J of heat to melt at \[{{0}^{o}}C\]. The entropy change will be

    A) \[1.2\,\,J\,{{K}^{-1}}mo{{l}^{-1}}\]

    B) \[335\,\,J{{K}^{-1}}mo{{l}^{-1}}\]

    C) \[22.1\,\,J{{K}^{-1}}mo{{l}^{-1}}\]

    D) \[0.8\,\,J{{K}^{-1}}mo{{l}^{-1}}\]

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  • question_answer57) An ideal gas cant be liquefied because

    A) its critical temperature is always above \[{{0}^{o}}C\]

    B) its molecules are relatively smaller in size

    C) it solidifies before becoming a liquid

    D) forces operative between its molecules are negligible

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  • question_answer58) What type of crystal defect is indicated in the diagram below? \[N{{a}^{+}}\,C{{l}^{-}}\,N{{a}^{+}}\] \[C{{l}^{-}}\,\,N{{a}^{+}}\,\,C{{l}^{-}}\] \[C{{l}^{-}}\] \[C{{l}^{-}}\,\,N{{a}^{+}}\,\,N{{a}^{+}}\] \[N{{a}^{+}}\,\,C{{l}^{-}}\] \[C{{l}^{-}}\,\,N{{a}^{+}}\,\,C{{l}^{-}}\] \[C{{l}^{-}}\,\,N{{a}^{+}}\] \[C{{l}^{-}}\,\,N{{a}^{+}}\,\,N{{a}^{+}}\]

    A) Frenkel defect

    B) Schottky defect

    C) Interstitial defect

    D) Frenkel and Schottky defects

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  • question_answer59) A metal has bcc structure and the edge length of its unit cell is \[3.04\,\,\overset{o}{\mathop{A}}\,\]. The volume of the unit cell in \[c{{m}^{3}}\] will be

    A) \[1.6\times {{10}^{-21}}c{{m}^{3}}\]

    B) \[2.81\times {{10}^{-23}}c{{m}^{3}}\]

    C) \[6.02\times {{10}^{-23}}c{{m}^{3}}\]

    D) \[6.6\times {{10}^{-24}}c{{m}^{3}}\]

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  • question_answer60) Peptisation denotes

    A) digestion of food

    B) hydrolysis of proteins

    C) breaking and dispersion into the colloidal state

    D) precipitation of solid from colloidal dispersion

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  • question_answer61) Plaster of Paris is

    A) \[CaS{{O}_{4}}\,.\,2{{H}_{2}}O\]

    B) \[CaS{{O}_{4}}\,.\,\,{{H}_{2}}O\]

    C) \[CaS{{O}_{4}}\,.\,\frac{1}{2}{{H}_{2}}O\]

    D) \[CaS{{O}_{4}}\,.\,4{{H}_{2}}O\]

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  • question_answer62) Cone. \[HN{{O}_{3}}\] reacts with \[{{I}_{2}}\] to form

    A) HI

    B) HOI

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

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

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  • question_answer63) Coal gas is a mixture of

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

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

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

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

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  • question_answer64) Stainless steel contains

    A) Fe + Cr + Cu

    B) Fe + Cu + Ni

    C) Fe + Cr + Ni

    D) Fe +Ni + Cu

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  • question_answer65) The isomers which can be converted into another form by rotation of the molecule around single bond are

    A) geometrical isomers

    B) conformers

    C) enantiomers

    D) diastereomers

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  • question_answer66) An organic compound contains 49.3% carbon, 6.84% hydrogen and its vapour density is 73. Molecular formula of the compound is

    A) \[{{C}_{3}}{{H}_{5}}{{O}_{2}}\]

    B) \[{{C}_{4}}{{H}_{10}}{{O}_{2}}\]

    C) \[{{C}_{6}}{{H}_{10}}{{O}_{4}}\]

    D) \[{{C}_{3}}{{H}_{10}}{{O}_{2}}\]

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  • question_answer67) Ozone in stratosphere is depleted by

    A) \[C{{F}_{2}}C{{l}_{2}}\]

    B) \[{{C}_{7}}{{F}_{16}}\]

    C) \[{{C}_{6}}{{H}_{6}}C{{l}_{6}}\]

    D) \[{{C}_{6}}{{F}_{6}}\]

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  • question_answer68) Iodine is formed when KI reacts with a solution of

    A) \[CuS{{O}_{4}}\]

    B) \[{{(N{{H}_{4}})}_{2}}S{{O}_{4}}\]

    C) \[ZnS{{O}_{4}}\]

    D) \[FeS{{O}_{4}}\]

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  • question_answer69) Select the correct order of the strength of acids given below

    A) \[HCl{{O}_{4}}<HCl{{O}_{3}}<HClO<HCl{{O}_{2}}\]

    B) \[HCl{{O}_{4}}<HCl{{O}_{3}}<HCl{{O}_{2}}<HClO\]

    C) \[HClO<HCl{{O}_{2}}<HCl{{O}_{3}}<HCl{{O}_{4}}\]

    D) None of the above

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  • question_answer70) Which one of the following statements regarding helium is incorrect?

    A) It is used to fill gas balloons instead of hydrogen because it is lighter and non- inflammable

    B) It is used as a cryogenic agent for carrying out experiments at low temperatures.

    C) It is used to produce and sustain powerful superconducting magnets

    D) It is used in gas-cooled nuclear reactors

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  • question_answer71) One would expect proton to have very large

    A) ionisation potential

    B) radius

    C) charge

    D) hydration energy

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  • question_answer72) What is the correct orbital designation of an electron with the quantum number, \[n=4,\,l=3,\,m=-2,\,\,s=\frac{1}{2}?\]

    A) 3s

    B) 4f

    C) 5p

    D) 6s

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  • question_answer73) The energy of an electron in second Bohr orbit of hydrogen atom is

    A) \[-5.44\times {{10}^{-19}}eV\]

    B) \[-5.44\times {{10}^{-19}}cal\]

    C) \[-5.44\times {{10}^{-19}}kJ\]

    D) \[-5.44\times {{10}^{-19}}J\]

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  • question_answer74) One of the following has greatest electron affinity. Identify it.

    A) O

    B) S

    C) Se

    D) Te

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  • question_answer75) The ONO angle is maximum in

    A) \[NO_{3}^{-}\]

    B) \[NO_{2}^{-}\]

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

    D) \[NO_{2}^{+}\]

    View Answer play_arrow
  • question_answer76) The pH value for \[\frac{1}{1000}\] N-KOH solution is

    A) 3

    B) 10-11

    C) 2

    D) 11

    View Answer play_arrow
  • question_answer77) The equilibrium constant for a reaction, \[{{N}_{2}}(g)+{{O}_{2}}(g)\,\,\,\rightleftarrows \,\,\,2NO(g)\] is \[4\times {{10}^{-4}}\] at 2000 K. In the presence of catalyst, the equilibrium is attained 10 times faster. The equilibrium constant in presence of catalyst at 2000 K is

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

    B) \[4\times {{10}^{-2}}\]

    C) \[4\times {{10}^{-4}}\]

    D) \[40\times {{10}^{-4}}\]

    View Answer play_arrow
  • question_answer78) Consider the following \[{{E}^{o}}\] values \[E_{F{{e}^{3+}}/F{{e}^{2+}}}^{o}=+0.77\,\,V\] \[E_{S{{n}^{2+}}/Sn}^{o}=-0.14\,\,V\] Under standard conditions the potential for the reaction, \[Sn(s)+2F{{e}^{3+}}(aq)\xrightarrow{{}}2F{{e}^{2+}}(aq)+S{{n}^{2+}}(aq)\] is

    A) 1.68 V

    B) 1.40 V

    C) 0.91 V

    D) 0.63 V

    View Answer play_arrow
  • question_answer79) The relationship between the values of osmotic pressure of 0.1 M solutions of \[KN{{O}_{3}}({{p}_{1}})\] and \[C{{H}_{3}}COOH({{p}_{2}})\] is

    A) \[\frac{{{p}_{1}}}{{{p}_{1}}+{{p}_{2}}}=\frac{{{p}_{2}}}{{{p}_{1}}+{{p}_{2}}}\]

    B) \[{{p}_{1}}>{{p}_{2}}\]

    C) \[{{p}_{2}}>{{p}_{1}}\]

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

    View Answer play_arrow
  • question_answer80) Volume of 0.6 M \[NaOH\] required to neutralize \[30\,c{{m}^{3}}\] of 0.4 M HCl is

    A) \[30\,\,c{{m}^{3}}\]

    B) \[45\,\,c{{m}^{3}}\]

    C) \[20\,\,c{{m}^{3}}\]

    D) \[50\,\,c{{m}^{3}}\]

    View Answer play_arrow
  • question_answer81) For nth order reaction, the half-life period, \[{{t}_{1/2}}\] is proportional to initial concentration as

    A) \[\frac{1}{{{a}^{n-1}}}\]

    B) \[{{a}^{n+1}}\]

    C) \[{{a}^{n-1}}\]

    D) \[\frac{1}{{{a}^{n}}}\]

    View Answer play_arrow
  • question_answer82) Thermite is a mixture of

    A) \[C{{r}_{2}}{{O}_{3}}+A{{l}_{2}}{{O}_{3}}\]

    B) \[F{{e}_{2}}{{O}_{3}}+Al\]

    C) \[F{{e}_{2}}{{O}_{3}}+A{{l}_{2}}{{O}_{3}}\]

    D) \[A{{l}_{2}}{{O}_{3}}+2Cr\]

    View Answer play_arrow
  • question_answer83) Of the ions \[Z{{n}^{2+}},N{{i}^{2+}}\] ad \[C{{r}^{3+}}\] (atomic number of Zn = 30, Ni = 28 and Cr = 24)

    A) all these are colourless

    B) all these are coloured

    C) only \[N{{i}^{2+}}\] is coloured and \[Z{{n}^{2+}}\]and \[C{{r}^{3+}}\] are colourless

    D) only \[Z{{n}^{2+}}\] is colourless and \[N{{i}^{2+}}\] and \[C{{r}^{3+}}\] are coloured

    View Answer play_arrow
  • question_answer84) The coordination number of a central metal atom in a complex is determined by

    A) the number of ligands around a metal ion bonded by G-bonds

    B) the number of ligands around a metal ion bonded by TC-bonds

    C) the number of ligands around a metal ion bonded by a and Ti-bonds both

    D) the number of only anionic ligands bonded to the metal ion

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  • question_answer85) Potassium ferricyanide on ionisation produces

    A) 2 ions

    B) 1 ion

    C) 3 ions

    D) 4 ions

    View Answer play_arrow
  • question_answer86) The IUPAC name of \[C{{H}_{3}}-\underset{\begin{smallmatrix} | \\ OH \end{smallmatrix}}{\mathop{C}}\,H-C{{H}_{2}}-\overset{\begin{smallmatrix} C{{H}_{3}} \\ | \end{smallmatrix}}{\mathop{\underset{\begin{smallmatrix} | \\ OH \end{smallmatrix}}{\mathop{C}}\,}}\,-C{{H}_{3}}\]

    A) 1,1-dimethyl-1,3-butanediol

    B) 2-methyl-2,4-pentanediol

    C) 4-methyl-2,4-pentanediol

    D) 1,3,3-trimethyl-l,3-propane diol

    View Answer play_arrow
  • question_answer87) The order of decreasing Stability of the carbanions is \[{{(C{{H}_{3}})}_{3}}\overline{C}(1),\,{{(C{{H}_{3}})}_{2}}\overline{C}H(2)C{{H}_{3}}\overline{C}{{H}_{2}}(3)\], \[{{C}_{6}}{{H}_{5}}\overline{C}{{H}_{2}}(4)\]

    A) \[1>2>3>4\]

    B) \[4>3>2>2>1\]

    C) \[1>2>4>3\]

    D) \[4>1>2>3\]

    View Answer play_arrow
  • question_answer88) Which set of products is expected on reductive ozonolysis of the following diolefin? \[C{{H}_{3}}CH=\overset{\begin{smallmatrix} C{{H}_{3}} \\ | \end{smallmatrix}}{\mathop{C}}\,-CH=C{{H}_{2}}\]

    A) \[C{{H}_{3}}CHO;C{{H}_{3}}COCH=C{{H}_{2}}\]

    B) \[C{{H}_{3}}CH=\underset{\begin{smallmatrix} | \\ C{{H}_{3}} \end{smallmatrix}}{\mathop{C}}\,-CHO;C{{H}_{2}}O\]

    C) \[C{{H}_{3}}CHO;C{{H}_{3}}COCHO;C{{H}_{2}}O\]

    D) \[C{{H}_{3}}CHO;C{{H}_{3}}COC{{H}_{2}};C{{H}_{2}}O\]

    View Answer play_arrow
  • question_answer89) Which of the following pairs is/are correctly matched?

    Reaction Product
    I. \[RX+AgCN\] RNC
    II. \[RX+KCN\] RCN
    III. \[RX+KN{{O}_{2}}\]
    IV. \[RX+AgN{{O}_{2}}\] \[R-O-N=O\]
    Select the correct answer using the codes given below

    A) I alone

    B) I and II

    C) III and IV

    D) I, II, III and IV

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  • question_answer90) A mixture of benzaldehyde and formaldehyde on heating with aqueous NaOH solution gives

    A) benzyl alcohol and sodium formate

    B) sodium benzoate and methyl alcohol

    C) sodium benzoate and sodium formate

    D) benzyl alcohol and methyl alcohol

    View Answer play_arrow
  • question_answer91) Which of the following react with NaOH to produce an acid and an alcohol?

    A) \[HCHO\]

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

    C) \[C{{H}_{3}}C{{H}_{2}}COOH\]

    D) \[{{C}_{6}}{{H}_{5}}COOH\]

    View Answer play_arrow
  • question_answer92) Which of the following has the maximum acidic strength?

    A) o-nitrobenzoic acid

    B) m-nitrobenzoic acid

    C) p-nitrobenzoic acid

    D) p-nitrophenol

    View Answer play_arrow
  • question_answer93) Fentons reagent is

    A) \[Zn+HCl\]

    B) \[Sn+HCl\]

    C) \[FeS{{O}_{4}}+{{H}_{2}}{{O}_{2}}\]

    D) None of these

    View Answer play_arrow
  • question_answer94) The energy stored in the cells of a living body is in the form of

    A) fats

    B) glucose

    C) ATP

    D) proteins

    View Answer play_arrow
  • question_answer95) Saccharin is a/an

    A) aliphatic hydrocarbon

    B) polynuclear compound

    C) sweetening agent

    D) sugar

    View Answer play_arrow
  • question_answer96) The nucleic acid the purine base having two possible binding sites is

    A) thymine

    B) cytosine

    C) guanine

    D) adenine

    View Answer play_arrow
  • question_answer97) On reduction secondary amine is given by

    A) nitroethane

    B) methylcyanide

    C) methylisocyanide

    D) nitrobenzene

    View Answer play_arrow
  • question_answer98) In chlorobenzene solution, the basic strength of amines increases in the order

    A) \[{{({{C}_{2}}{{H}_{5}})}_{3}}N<{{({{C}_{2}}{{H}_{5}})}_{2}}NH<{{C}_{2}}{{H}_{5}}N{{H}_{2}}\]

    B) \[({{C}_{2}}{{H}_{5}})N{{H}_{2}}<{{({{C}_{2}}{{H}_{5}})}_{2}}NH<{{({{C}_{2}}{{H}_{5}})}_{3}}N\]

    C) \[{{({{C}_{2}}{{H}_{5}})}_{2}}NH<{{C}_{2}}{{H}_{5}}N{{H}_{2}}<{{({{C}_{2}}{{H}_{5}})}_{3}}N\]

    D) \[{{({{C}_{2}}{{H}_{5}})}_{3}}N<{{C}_{2}}{{H}_{5}}N{{H}_{2}}<{{({{C}_{2}}{{H}_{5}})}_{2}}NH\]

    View Answer play_arrow
  • question_answer99) Dimethyl terephthalate and ethylene glycol react to form

    A) nylon-6

    B) nylon-66

    C) dacron

    D) neoprene

    View Answer play_arrow
  • question_answer100) Gasoline is a mixture of

    A) \[{{C}_{6}}-{{C}_{11}}\] alkanes

    B) \[{{C}_{3}}-{{C}_{5}}\] alkanes

    C) \[{{C}_{7}}-{{C}_{9}}\] alkanes

    D) \[{{C}_{15}}-{{C}_{20}}\] alkanes

    View Answer play_arrow
  • question_answer101) Paraffin wax is

    A) ester

    B) acid

    C) monohydric alcohol

    D) cholesterol

    View Answer play_arrow
  • question_answer102) In Pinus, male cone bears a large number of

    A) ligules

    B) anthers

    C) microsporophylls

    D) megasporophylls

    View Answer play_arrow
  • question_answer103) In plants, water supply is due to

    A) osmosis

    B) imbibition

    C) guttation

    D) adhesion force

    View Answer play_arrow
  • question_answer104) Streptomycin is obtained from

    A) Streptomyces griseus

    B) Streptomyces aureofaciens

    C) Streptomyces venezuelae

    D) Streptomyces ramosus

    View Answer play_arrow
  • question_answer105) Podocytes are the cells, present in

    A) cortex of nephron

    B) inner wall of Bowmans capsule

    C) outer wall of Bowmans capsule

    D) wall of glomerular capillaries

    View Answer play_arrow
  • question_answer106) Vitamin-D is synthesised in skin by the action of sunlight on

    A) cholesterol

    B) 7-hydroxy cholesterol

    C) cephalin cholesterol

    D) All of the above

    View Answer play_arrow
  • question_answer107) Lichen is the pioneer vegetation on which succession?

    A) Hydrosere

    B) Lithosere

    C) Psammosere

    D) Xerosere

    View Answer play_arrow
  • question_answer108) Spindle fibre is made up of

    A) tubulin

    B) humulin

    C) intermediate filament

    D) flagellin

    View Answer play_arrow
  • question_answer109) Late blight of potato is caused by

    A) Ustilago

    B) Pseudomonas

    C) Phytophthora infestans

    D) Colletotricum falcatum

    View Answer play_arrow
  • question_answer110) Most accepted theory for ascent of sap is

    A) capillarity theory

    B) root pressure theory

    C) pulsation theory

    D) transpiration pull

    View Answer play_arrow
  • question_answer111) Cleavage polyembryony occurs in

    A) Pinus

    B) mini Cycas

    C) Cycas

    D) Ephedra

    View Answer play_arrow
  • question_answer112) Edible part of mushroom is

    A) basidiocarp

    B) secondary mycelium

    C) primary mycelium

    D) tertiary mycelium

    View Answer play_arrow
  • question_answer113) Which is a major crop in Asia?

    A) Rice

    B) Sugarcane

    C) Jowar

    D) Millet

    View Answer play_arrow
  • question_answer114) In malaria, the product released by mosquito into blood that causes chill and fever, is called

    A) heamatin

    B) Schuffhers dots

    C) haemozoin

    D) haemotoxin

    View Answer play_arrow
  • question_answer115) Most widely used bioweapon is

    A) Bacillus subtilis

    B) Pseudomonas putida

    C) Bacillus anthracis

    D) None of the above

    View Answer play_arrow
  • question_answer116) Ruminate endospermis found in

    A) Cruciferae

    B) Asteraceae

    C) Euphorbiaceae

    D) Annonaceae

    View Answer play_arrow
  • question_answer117) Viral genome incorporated host DNA is called

    A) prophase

    B) prophage

    C) bacteriophage

    D) None of these

    View Answer play_arrow
  • question_answer118) In Mollusca, eye is present over a stalk, called

    A) ostractum

    B) operculum

    C) ommatophores

    D) osphradium

    View Answer play_arrow
  • question_answer119) In cell cycle/during which phase, chromosomes are arranged in equatorial plate?

    A) Metophase

    B) Anaphase

    C) Telophase

    D) Prophase

    View Answer play_arrow
  • question_answer120) Intron transcripts in heterogeneous nuclear RNA (7mRNA)are removed and exon transcripts are joined together under the direction of protein complexes. These complexes are

    A) polysomes

    B) cdk complex

    C) spliceosomes

    D) endopeptidases

    View Answer play_arrow
  • question_answer121) Myrmecobius and Myrmecophaga are closely related and have similar adaptations for the same habitat. This phenomenon is

    A) divergent evolution

    B) homoplasv

    C) convergent evolution

    D) parallel evolution

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  • question_answer122) Which are the sites of ATPase activity in the cilia and flagella?

    A) Base of cilia and flagella

    B) Doublets

    C) Basal granules of cilia and flagella

    D) Dynein arms

    View Answer play_arrow
  • question_answer123) This joint allows restricted movement in different planes.

    A) Arthrodia

    B) Enarthroses

    C) Ginglymi

    D) Rotatoria

    View Answer play_arrow
  • question_answer124) The source of intoxicating beverage called Sake is

    A) Sorghum vulgare

    B) Arachis hypogea

    C) Oryza sativa

    D) Mangifera indica

    View Answer play_arrow
  • question_answer125) In poultry birds, nasal and eye discharges with foul smell, acute respiratory problem and inflamed and swollen eyes are the symptoms of

    A) chronic respiratory disease

    B) infectious coryza dfsease

    C) brooder pneumonia disease

    D) Marcks disease

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  • question_answer126) The hyposecretion of which hormones leads to loss of sodium and water through urine, low blood pressure and hypotension?

    A) Thyro trophic hormones

    B) Hormones of adrenal cortex

    C) Hormones of adrenal medulla

    D) Luteotrophic hormones

    View Answer play_arrow
  • question_answer127) From among the following, identify the substrate required for the only oxidative reaction that occurs in the process of glycolysis.

    A) 3-phosphogylceric acid

    B) Glyceraldehyde-3-phosphate

    C) Fructose-6-phosphate

    D) Glucose-6-phosphate

    View Answer play_arrow
  • question_answer128) Fasciola hepatica is a digenetic parasite. Sheep and snail are two hosts. Snail is

    A) intermediate host

    B) paratenic host

    C) vector host

    D) reservoir host

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  • question_answer129) Seeds possess spongy aril in

    A) Eicchornia

    B) Potamogeton

    C) Sagittaria

    D) Nymphaea

    View Answer play_arrow
  • question_answer130) What type of plant is formed when colchicine is used in the process of development of Raphanobrassica?

    A) Triploid

    B) Haploid

    C) Autotetraploid

    D) Allotetraploid

    View Answer play_arrow
  • question_answer131) Which one of the following denotes the water potential of the mesophyll cell in wilted condition?

    A) Equal to the value of osmotic potential

    B) Equal to the value of pressure potential

    C) Greater than the value of its osmotic potential

    D) Equal to zero

    View Answer play_arrow
  • question_answer132) Identify the hepatitis virus, which cannot survive independently and it requires another hepatitis virus for its multiplication.

    A) Hepatitis-A virus

    B) Hepatitis-B virus

    C) Hepatitis-C virus

    D) Hepatitis-D virus

    View Answer play_arrow
  • question_answer133) The aerial, short and branched roots of an autotrophic plant that provide stability are known as

    A) lateral roots

    B) haustoria

    C) velamen roots

    D) clinging roots

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  • question_answer134) The parthenospores of Rhizopus are

    A) uninucleate

    B) binucleate

    C) trinucleate

    D) multinucleate

    View Answer play_arrow
  • question_answer135) The yielding of rice is increased by

    A) Azolla

    B) Nostoc

    C) Anabaena

    D) Clostridium

    View Answer play_arrow
  • question_answer136) Thigmotaxis is not shown by

    A) Paramecium

    B) Amoeba

    C) Ascaris

    D) Hydra

    View Answer play_arrow
  • question_answer137) 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_answer138) Which crop utilises solar energy most efficiently?

    A) Potato

    B) Sugarcane

    C) Wheat

    D) Rice

    View Answer play_arrow
  • question_answer139) The process after glycolysis in anaerobic respiration is known as

    A) fermentation

    B) respiration

    C) Krebs cycle

    D) decomposition

    View Answer play_arrow
  • question_answer140) In Funaria, stomata are present on the

    A) stem

    B) leaves

    C) capsule

    D) apophysis

    View Answer play_arrow
  • question_answer141) Wilting of plant is due to

    A) blockage of phloem

    B) blockage of xylem

    C) when some roots and phloem are removed

    D) tracheid is blocked

    View Answer play_arrow
  • question_answer142) Among the following, colonial insects are

    A) locusts

    B) mosquitoes

    C) white ants

    D) bed bug

    View Answer play_arrow
  • question_answer143) 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

    View Answer play_arrow
  • question_answer144) The following process is used to get desired breed of plants.

    A) Tissue culture

    B) Genetic engineering

    C) Inbreeding

    D) Ikebana

    View Answer play_arrow
  • question_answer145) Which enzyme converts glucose into alcohol?

    A) Zymase

    B) Diastase

    C) Invertase

    D) Lipase

    View Answer play_arrow
  • question_answer146) Calyptra is derived from

    A) archegonia

    B) capsule

    C) antheridia

    D) columella

    View Answer play_arrow
  • question_answer147) The embryo at 16-celled stage is known as

    A) morula

    B) gastrula

    C) blastula

    D) blastomere

    View Answer play_arrow
  • question_answer148) Medicine for curing respiratory problems is obtained from

    A) Ephedra

    B) Calotropis

    C) Eucalyptus

    D) Cannabis

    View Answer play_arrow
  • question_answer149) For production of haploids, we culture

    A) shoot tip

    B) anther

    C) root tip

    D) None of these

    View Answer play_arrow
  • question_answer150) Most nutritious among the following is

    A) wheat

    B) maize

    C) bajra

    D) rice

    View Answer play_arrow

   

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