Solved papers for Chhattisgarh PMT Chhattisgarh PMT Solved Paper-2007

Chhattisgarh PMT Solved Paper-2007 Total Questions - 400

1) Dimensional formula for \[{{\varepsilon }_{0}}\] is

A)

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

B)

\[\text{ }\!\![\!\!\text{ M}{{\text{L}}^{\text{-2}}}{{\text{A}}^{\text{-2}}}{{\text{T}}^{4}}\text{ }\!\!]\!\!\text{ }\]

C)

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

D)

\[\text{ }\!\![\!\!\text{ M}{{\text{L}}^{3}}{{\text{A}}^{\text{-2}}}{{\text{T}}^{-4}}\text{ }\!\!]\!\!\text{ }\]

View Answer
2) The velocity v (in cm/s) of a particle is given in terms of time t (in sec) by the relation \[y=at+\frac{b}{t+c};\] the dimensions of a, b and c are

A)

\[a\,\text{=}\,\text{ }\!\![\!\!\text{ }{{\text{L}}^{\text{2}}}\text{ }\!\!]\!\!\text{ ,}\,\text{b}\,\text{=}\,\text{ }\!\![\!\!\text{ T }\!\!]\!\!\text{ ,}\,\text{c}\,\text{=}\,\text{ }\!\![\!\!\text{ L}{{\text{T}}^{\text{2}}}\text{ }\!\!]\!\!\text{ }\]

B)

\[a\,\text{=}\,\text{ }\!\![\!\!\text{ L}{{\text{T}}^{\text{2}}}\text{ }\!\!]\!\!\text{ ,}\,\text{b}\,\text{=}\,\text{ }\!\![\!\!\text{ LT }\!\!]\!\!\text{ ,}\,\text{c}\,\text{=}\,\text{ }\!\![\!\!\text{ L }\!\!]\!\!\text{ }\]

C)

\[a\,\text{=}\,\text{ }\!\![\!\!\text{ L}{{\text{T}}^{\text{-2}}}\text{ }\!\!]\!\!\text{ ,}\,\text{b}\,\text{=}\,\text{ }\!\![\!\!\text{ L }\!\!]\!\!\text{ ,}\,\text{c}\,\text{=}\,\text{ }\!\![\!\!\text{ T }\!\!]\!\!\text{ }\]

D)

\[a\,\text{=}\,\text{ }\!\![\!\!\text{ L }\!\!]\!\!\text{ ,}\,\text{b}\,\text{=}\,\text{ }\!\![\!\!\text{ LT }\!\!]\!\!\text{ ,}\,\text{c}\,\text{=}\,\text{ }\!\![\!\!\text{ }{{\text{T}}^{2}}\text{ }\!\!]\!\!\text{ }\]

View Answer
3)   Car A starts initially with the acceleration \[{{a}_{1}},\] after 2 s the car B starts with acceleration \[{{a}_{2}}.\]If in \[{{\text{5}}^{\text{th}}}\text{s}\] both car travels same distance, then the ratio of a \[{{a}_{1}}\] and \[{{a}_{2}}\] will be

A)

5 : 9

B)

5 : 7

C)

9 : 5

D)

9 : 7

View Answer
4) The \[\text{v-t}\] graph of a moving object is given in figure. The maximum acceleration is

A)

\[1\text{ }cm/{{s}^{2}}\]

B)

\[\text{2 }cm/{{s}^{2}}\]

C)

\[\text{3 }cm/{{s}^{2}}\]

D)

\[\text{6 }cm/{{s}^{2}}\]

View Answer
5) A 2 kg stone at the end of a string 1 m long is whirled in a vertical circle at a constant speed. The speed of the stone is 4 m/s. The tension in the string will be 52 N, when the stone is

A)

at the top of the circle

B)

at the bottom of the circle

C)

halfway down

D)

None of the above

View Answer
6) Figure shows four paths for a kicked football. Ignoring the effects of air on the flight, rank the paths according to initial horizontal velocity component, highest first

A)

1, 2, 3, 4

B)

2, 3, 4,1

C)

3, 4, 1, 2

D)

4, 3, 2, 1

View Answer
7) A body floats in a liquid contained in a beaker. If the whole system as shown in figure falls freely under gravity, then the upthrust on the body due to liquid is

A)

zero

B)

equal to the weight of liquid displaced

C)

equal to the weight of the body in air

D)

None of the above

View Answer
8) Two carts of masses 200 kg and 300 kg on horizontal rails are pushed apart. Suppose the coefficient of friction between the carts and the rails are same. If the 200 kg cart travels a distance of 36 m and stops, then the distance travelled by the cart weighing 300 kg is

A)

32m

B)

24m

C)

16m

D)

12m

View Answer
9) The force constant of weightless spring is 16 N/m. A body of mass 1.0 kg suspended from it is pulled down through 5 cm and then released. The maximum kinetic energy of the system (spring +body) will be

A)

\[\text{2 }\!\!\times\!\!\text{ 1}{{\text{0}}^{\text{-2}}}\text{J}\]

B)

\[\text{4 }\!\!\times\!\!\text{ 1}{{\text{0}}^{\text{-2}}}\text{J}\]

C)

\[\text{8 }\!\!\times\!\!\text{ 1}{{\text{0}}^{\text{-2}}}\text{J}\]

D)

\[\text{16 }\!\!\times\!\!\text{ 1}{{\text{0}}^{\text{-2}}}\text{J}\]

View Answer
10) A frictionless track A B C D E ends in a circular loop of radius R. A body slides down the track from point A which is at a height h = S cm. Maximum value of R for the body to successfully complete the loop is

A)

\[\text{5}\,\text{cm}\]

B)

\[\frac{15}{4}\,\text{cm}\]

C)

\[\frac{10}{3}\,\text{cm}\]

D)

\[\text{2}\,\text{cm}\]

View Answer
11) A constant torque acting on a uniform circular wheel changes its angular momentum from \[{{\text{A}}_{\text{0}}}\] to \[\text{4}{{\text{A}}_{\text{0}}}\] in 4 s. The magnitude of this torque is

A)

\[\frac{3{{A}_{0}}}{4}\]

B)

\[{{A}_{0}}\]

C)

\[4{{A}_{0}}\]

D)

\[121{{A}_{0}}\]

View Answer
12) The rotational kinetic energy of a body is KE and its moment of inertia is \[I\] The angular momentum is

A)

\[KEI\]

B)

\[2\sqrt{KEI}\]

C)

\[\sqrt{2KEI}\]

D)

\[KE/I\]

View Answer
13) A planet is moving around the sun in an elliptic orbit. Its speed

A)

is the same at all points of the orbit

B)

is maximum when it is farthest from the sun

C)

is maximum when it is nearest to the sun

D)

is maximum at the two points in which the orbit is intersected by the line which passes through the focus of the orbit and which is perpendicular to its major axis

View Answer
14)  Rohini satellite at a height of 500 km and INSAT-B at a height of 3600 km from surface of earth, then relation between their orbital velocity \[({{v}_{R,}}{{v}_{I}})\] is

A)

\[({{v}_{R}}>{{v}_{I}})\]

B)

\[({{v}_{R}}<{{v}_{I}})\]

C)

\[{{v}_{R}}={{v}_{I}})\]

D)

No relation

View Answer
15) A wire of cross-sectional area 3 mm2 is first stretched between two fixed points at a temperature of \[20{}^\circ C\]. Determine the tension when the temperature falls to \[10{}^\circ C\]. Coefficient of linear   expansion \[a={{10}^{5}}{{\,}^{\text{o}}}{{\text{C}}^{-1}}\]and

A)

20 N

B)

30 N

C)

60 N

D)

120 N

View Answer
16) If the length of a wire is reduced to half, then it can hold the................. load

A)

half

B)

same

C)

double

D)

one-fourth

View Answer
17) If two soap bubbles of different radii are in communication with each other

A)

Air flows from larger bubble into the smaller one

B)

The size of the bubbles remains the same

C)

Air flows from the smaller bubble into the larger one and the larger bubble grows at the expense of the smaller one

D)

The air flows from the larger

View Answer
18) Two capillary tubes of same diameter are put vertically one each in two liquids whose relative densities are 0.8 and 0.6 and surface tensions are 60 and 50 dyne cm respectively ratio of heights of liquids in the two tubes is

A)

10/9

B)

3/10

C)

10/3

D)

9/10

View Answer
19) At which temperature the velocity of \[{{O}_{2}}\] molecules will be equal to the velocity of \[{{N}_{2}}\] molecules at \[O{{\,}^{\text{o}}}\text{C}\] ?

A)

\[40{}^\circ C\]

B)

\[93{}^\circ C\]

C)

\[39{}^\circ C\]

D)

Cannot be calculated

View Answer
20) If the volume of the gas containing m number of molecules is V, then the pressure will decrease due to force of intermolecular attraction in the proporation.

A)

\[n/V\]

B)

\[n/{{V}^{2}}\]

C)

\[~{{(n/V)}^{2}}\]

D)

\[1/{{V}^{2}}\]

View Answer
21) Work done in converting one gram of ice at WC into steam at \[100{}^\circ C\] is

A)

3045 J

B)

6056 J

C)

721 J

D)

616 J

View Answer
22) A Carnot engine working between 300 K and 600 K has a work output of 800 J per cycle. What is the amount of heat energy supplied to the engine from source per cycle ?

A)

1200 J/cycle

B)

1600 J/cycle

C)

1400 J/cycle

D)

None of the above

View Answer
23) Two large closely spaced concentric spheres (both are black body radiators) are maintained at temperature of 200 K and 300 K respectively. The space between them is evacuated. The net rate of energy transfer between the two spheres will be (\[\sigma \]\[=5.672\times {{10}^{8}}MKS\] unit)

A)

368.68W/m2

B)

3686.8 W/m2

C)

36.868 W/m2

D)

36868 W/m2

View Answer
24) Two identical vessels made up of same material are filled with same amount of ice. If in the vessels the ice melts in time \[{{t}_{1}}\] and \[{{t}_{2}}\] respectively, then the ratio of their thermal conductivities will be

A)

\[{{t}_{2}}:{{t}_{1}}\]

B)

\[{{t}_{1}}:{{t}_{2}}\]

C)

\[t_{2}^{2}:t_{1}^{2}\]

D)

\[t_{1}^{2}:t_{2}^{2}\]

View Answer
25) The velocity-time diagram of harmonic oscillator is shown in the adjoining figure. The frequency of oscillation is

A)

\[\text{25}\,\text{Hz}\]

B)

\[\text{50}\,\text{Hz}\]

C)

\[12.25\,\text{Hz}\]

D)

\[33\,\text{Hz}\]

View Answer
26) The frequency of oscillation of system shown in the figure will be

A)

            \[\frac{1}{2\pi }\sqrt{\frac{k}{M}}\]

B)

            \[\frac{1}{2\pi }\sqrt{\frac{2k}{5M}}\]

C)

            \[\frac{1}{2\pi }\sqrt{\frac{k}{5M}}\]

D)

            \[\frac{1}{2\pi }\sqrt{\frac{2k}{M}}\]

View Answer
27) On a smooth inclined plane, a body of mass M b attached between two springs. The other ends of the springs are fixed to firm supports. If each spring has force constant k, the period of oscillation of the body (assuming the springs as massless) is

A)

\[2\pi {{\left( \frac{M}{2k} \right)}^{1/2}}\]

B)

\[2\pi {{\left( \frac{2M}{k} \right)}^{1/2}}\]

C)

\[2\pi \frac{Mg\,\sin \,\text{ }\!\!\theta\!\!\text{ }}{2k}\]

D)

\[2\pi {{\left( \frac{2Mg}{k} \right)}^{1/2}}\]

View Answer
28) in the arrangement shown in the figure, for vertical oscillations of the mass m, the period is

A)

\[T=2\pi \sqrt{\frac{m}{{{k}_{1}}-{{k}_{2}}}}\]

B)

\[T=2\pi \sqrt{\frac{{{k}_{1}}+{{k}_{2}}}{m}}\]

C)

\[T=2\pi \sqrt{\frac{m({{k}_{1}}+{{k}_{2}})}{{{k}_{1}}{{k}_{2}}}}\]

D)

\[T=2\pi \sqrt{\frac{mg}{{{k}_{1}}+{{k}_{2}}}}\]

View Answer
29) A string fixed at both the ends is vibrating in two segments. The wavelength of the corresponding time is

A)

\[l/4\]

B)

\[l/2\]

C)

\[l\]

D)

\[2l\]

View Answer
30) A sitar wire vibrates with frequency 330 vib/s. If its length is increased three times and tension is increased four times, then the frequency of the wire will be

A)

330 Hz

B)

220 Hz

C)

110 Hz

D)

440 Hz

View Answer
31) A wire of 1m length and \[9\times {{10}^{3}}g/{{m}^{3}}\] density is clamped between two points. If its extension on loading is 0.36 mm, then frequency of small transverse vibration is (Young's modulus \[=9\times {{10}^{10}}N/{{m}^{2}}\])

A)

30 Hz

B)

40 Hz

C)

50 Hz

D)

60 Hz

View Answer
32) The length of a sonometer wire AB is 110 cm. Where should the two bridges be placed from A to divide the wire in 3 segments whose fundamental frequencies are in the ratio of =1:2:3

A)

30 cm and 60 cm

B)

40 cm and 80 cm

C)

60 cm and 90 cm

D)

30 cm and 90 cm

View Answer
33) If the amplitude ratio of two sources producing interference is 3 : 5, the ratio of intensities at maxima and minima is

A)

25 : 16

B)

5 : 3

C)

16 : 1

D)

25 : 9

View Answer
34) In two separate set-ups of the Young's double slit experiment fringes of equal width are observed when lights of wavelengths in the ratio 1:2 are- used. If the ratio of the slit separation in the two cases is 2:1 the ratio of the distance between the plane of the slits and the screen in the two set-ups is

A)

4:1

B)

1:1

C)

1:4

D)

2:1

View Answer
35) Radius of curvature of concave mirror is 40 cm and the size of image is twice as that of object, then the object distance is

A)

60 cm

B)

20 cm

C)

40cm

D)

30cm

View Answer
36) If an object is placed 10 cm in front of a concave mirror of focal length 20 cm, the image will be

A)

diminished, upright, virtual

B)

enlarged, upright, virtual

C)

diminished, inverted, real

D)

enlarged, upright, real

View Answer
37) It is desired to photograph the image of an object placed at a distance of 3 m from the plane mirror. The camera which is at a distance of 4.5 m from the mirror should be focused for a distance of

A)

3 m

B)

4.5 m

C)

6 m

D)

7.5 m

View Answer
38) A white screen illuminated by green and red light appears to be

A)

green

B)

red

C)

yellow

D)

white

View Answer
39) The critical angle of light passing from glass to air is minimum for

A)

red light

B)

yellow light

C)

green light

D)

violet light

View Answer
40) A ray of light is incident on a equilateral prism kept on a horizontal table (as shown). Which of the following statement is wrong for the angle of minimum deviation ?

A)

P Q should be parallel to the base

B)

Q R should be parallel to the base

C)

RS should be parallel to the base

D)

Any one of PQ and RS should be horizontal

View Answer
41) A person cannot see objects clearly beyond 50 cm. They power of the lens to correct the vision is

A)

-5.0D

B)

-0.5D

C)

+2D

D)

-2D

View Answer
42) The focal length of objective and eye lens of microscope are 1.6 cm and 2.5 cm respectively. The distance between the two lenses is 21.7 cm. If the final image is formed at infinity, then the distance between the object lens and object is

A)

1.80 cm

B)

1.70 cm

C)

1.65 cm

D)

1.75 cm

View Answer
43) The minimum magnifying power of a telescope is m. If the focal length of its eye lens is halved, the magnifying power will become

A)

m/2

B)

2m

C)

3m

D)

4m

View Answer
44) The rest energy of an electron is 0.511 Me V. The electron is accelerated from rest to a velocity 0.5c. The change in its energy will be

A)

0.026 MeV

B)

0.051 MeV

C)

0.079 MeV

D)

0.105 MeV

View Answer
45) An electron beam has a kinetic energy equal to 100 eV. Find its wavelength associated with a beam, if mass of electron \[=9.1\times {{10}^{-31}}\]kg and 1 eV\[=1.6\times {{10}^{-19}}\]J/eV (Planck's constant \[=6.6\times {{10}^{-34}}\text{J-s})\]

A)

\[6.3\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\]

B)

\[3.8\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\]

C)

\[24.6\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\]

D)

\[0.12\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\]

View Answer
46) The energy of a photon of light of wavelength 450 nm is

A)

\[4.4\times {{10}^{-19}}\text{J}\]

B)

\[2.5\times {{10}^{-19}}\text{J}\]

C)

\[1.25\times {{10}^{-17}}\text{J}\]

D)

\[2.5\times {{10}^{-17}}\text{J}\]

View Answer
47) The wavelength of the most energetic X-ray emitted when a metal target is bombarded by 100 ke V electrons is approximately.

A)

\[12\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\]

B)

\[4\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\]

C)

\[0.31\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\]

D)

\[0.124\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\]

View Answer
48) For production of characteristic \[{{K}_{\text{ }\!\!\beta\!\!\text{ }}}\] X-rays, the electron transition is

A)

\[n=2\,to\,n=1\]

B)

\[n=3\,to\,n=2\]

C)

\[n=3\,to\,n=1\]

D)

\[n=4\,to\,n=2\]

View Answer
49) An X-ray tube operates on 30 kV. What is the minimum wave length emitted ? \[c=3\times {{10}^{8}}\text{m}{{\text{s}}^{\text{-1}}}\text{,}\]\[e=1.6\times {{10}^{-19}}C)\] \[e=1.6\times {{10}^{-19}}C)\]

A)

\[0.133\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\]

B)

\[0.4\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\]

C)

\[1.2\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\]

D)

\[6.6\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\]

View Answer
50) Atomic hydrogen is excited to the \[{{\text{n}}^{\text{th}}}\] energy level. The maximum number of spectral lines which it can emit while returning to the ground state is

A)

\[\frac{1}{2}n(n-1)\]

B)

\[\frac{1}{2}n(n+1)\]

C)

\[n(n-1)\]

D)

\[n(n+1)\]

View Answer
51) \[a\]-particles of energy 400 ke V are bombarded on nucleus of \[_{\text{82}}\text{Pb}\text{.}\] In scattering of \[a\]-particles, its minimum distance form nucleus will be

A)

0.59 nm

B)

\[0.59\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\]

C)

5.9pm

D)

0.59pm

View Answer
52) If half-life of a radioactive atom is 2.3 days, then its decay constant would be

A)

0.1

B)

0.2

C)

0.3

D)

2.3

View Answer
53) In a good conductor the energy gap between the conduction band and the valence band is

A)

infinite

B)

wide

C)

narrow

D)

zero

View Answer
54) A semiconductor has an electron concentration density of\[8\times {{10}^{14}}\text{/c}{{\text{m}}^{\text{3}}}\] and that of holes is \[5\times {{10}^{12}}\text{/c}{{\text{m}}^{\text{3}}}\text{.}\] The semiconductor is

A)

n-type

B)

p-type

C)

intrinsic

D)

p-n-p type

View Answer
55) The current relationship between two current gains a and \[\text{ }\!\!\beta\!\!\text{ }\] in a transistor is

A)

\[\text{ }\!\!\beta\!\!\text{ }\,\text{=}\,\frac{a}{1+a}\]

B)

\[\text{ }\!\!\beta\!\!\text{ }\,\text{=}\,\frac{a+1}{a}\]

C)

\[a\,\text{=}\,\frac{\text{ }\!\!\beta\!\!\text{ }}{a+\text{ }\!\!\beta\!\!\text{ }}\]

D)

\[\,\text{ }\!\!\beta\!\!\text{ =}\,\frac{\text{ }\!\!\beta\!\!\text{ +1}}{\text{ }\!\!\beta\!\!\text{ }}\]

View Answer
56) Two bar magnets of the same mass, length and breadth but magnetic moments M and 2 M respectively, when placed in same position, time period is 3 s. What will be the time period when they are placed in different position?

A)

\[\sqrt{2}\,s\]

B)

\[3\sqrt{3}\,s\]

C)

3 s

D)

6 s

View Answer
57) Vibration magnetometer works on the principle of

A)

torque acting on the bar magnet

B)

force acting on the bar magnet

C)

Both the force and the torque acting on the bar magnet

D)

None of the above

View Answer
58) The time period of a freely suspended magnet is 2 s. If it is broken in length into two equal parts and one part is suspended in the same way, then its time period will be

A)

4s

B)

2s

C)

\[\sqrt{2}\,s\]

D)

1 s

View Answer
59) Which of the following charge is not possible?

A)

\[1.6\times {{10}^{-19}}C\]

B)

\[4.8\times {{10}^{-19}}C\]

C)

\[8\times {{10}^{-19}}C\]

D)

\[6\times {{10}^{-19}}C\]

View Answer
60) If dielectric constant of water is 81, then its permittivity is

A)

\[7.2\times {{10}^{10}}\frac{{{\text{C}}^{\text{2}}}}{\text{N-}{{\text{m}}^{\text{2}}}}\]

B)

\[8.86\times {{10}^{-9}}\frac{{{\text{C}}^{\text{2}}}}{\text{N-}{{\text{m}}^{\text{2}}}}\]

C)

\[1.02\times {{10}^{-12}}\frac{{{\text{C}}^{\text{2}}}}{\text{N-}{{\text{m}}^{\text{2}}}}\]

D)

None of these

View Answer
61) An electron of 100 eV energy is projected towards large negatively charged plate having charge density \[-2\times 10{{-}^{6}}C/{{m}^{2}}.\] Then, what must be the distance of electron, so it does not strike the plate?

A)

0.44mm

B)

0.44cm

C)

044m

D)

None of these

View Answer
62) Two opposite and equal charges of \[4\times {{10}^{-8}}C\] when placed \[2\times {{10}^{-2}}cm\] away form a dipole. If this dipole is placed in an external electric field \[4\times {{10}^{8}}N/C,\] the value of maximum torque and the work done in rotating it through \[180{}^\circ C\] will be

A)

\[64\times {{10}^{-4}}Nm\text{ }and\text{ }64\times {{10}^{-4}}J\]

B)

\[32\times {{10}^{-4}}Nm\text{ }and\text{ }32\times {{10}^{-4}}J\]

C)

\[64\times {{10}^{-4}}Nm\text{ }and\text{ }32\times {{10}^{-4}}J\]

D)

\[32\times {{10}^{-4}}Nm\text{ }and\text{ }64\times {{10}^{-4}}J\]

View Answer
63) Water is a good solvent because its molecules are

A)

neutral

B)

polar

C)

non-polar

D)

anode

View Answer
64) In Figure, \[a<r<b\] then intensity at r distance from centre is

A)

\[\frac{1}{4\pi {{\varepsilon }_{0}}}\left[ \frac{3q}{{{r}^{2}}}-\frac{q}{{{(b-r)}^{2}}} \right]\]

B)

\[\frac{1}{4\pi {{\varepsilon }_{0}}}\left[ \frac{-q}{{{r}^{2}}} \right]\]

C)

\[\frac{1}{4\pi {{\varepsilon }_{0}}}\left( \frac{3q}{{{r}^{2}}} \right)\]

D)

\[\frac{1}{4\pi {{\varepsilon }_{0}}}\frac{3q}{{{a}^{2}}}\]

View Answer
65) An electron falls through 4 cm in uniform field f \[5\times {{10}^{4}}\text{N/C,}\] then time required must be

A)

\[2.99\times {{10}^{-7}}\text{s}\]

B)

\[2.99\times {{10}^{-8}}\text{s}\]

C)

\[2.99\times {{10}^{-9}}\text{s}\]

D)

\[2.99\times {{10}^{-10}}\text{s}\]

View Answer
66) A capacitor of \[6\mu F\] capacitance is charged up to 100 V. It is touched and then removed with another uncharged capacitor of \[14\mu F,\] then ratio of charges on both and potential at \[6\mu F\] capacitor is

A)

6/14 and 50V

B)

3/7 and 30V

C)

7/3 and 30V

D)

None of these

View Answer
67) Capacity of parallel plate capacitor is \[10\mu F,\] when gap between plates is 8 cm, then what will be its capacity if gap is reduced to 4 cm?

A)

\[10\text{ }\mu F\]

B)

\[40\text{ }\mu F\]

C)

\[20\text{ }\mu F\]

D)

\[30\text{ }\mu F\]

View Answer
68) Capacitor of 12 pF capacitance is connected to 50V battery then electrostatic potential energy will be

A)

\[1.5\times {{10}^{-8}}\text{J}\]

B)

\[2.5\times {{10}^{-7}}\text{J}\]

C)

\[3.5\times {{10}^{-5}}\text{J}\]

D)

\[4.5\times {{10}^{-2}}\text{J}\]

View Answer
69) Two sphere of radii 4 cm and 6 cm are given \[80\text{ }\mu C\] and \[40\text{ }\mu C\]charges and both are joined by wire, then charge will flow.

A)

\[32\mu C\] from A to B

B)

\[24\text{ }\mu C\] from A to B

C)

\[32\text{ }\mu C\] from B to A

D)

None of the above

View Answer
70) If initial capacitance of capacitor is C, then final capacity of capacitor will be

A)

\[KC\]

B)

\[(K+1)C\]

C)

\[(K+1)C\text{/2}\]

D)

\[(K-1)C\]

View Answer
71) Potential difference across capacitor of 4.5 µF capacitance is

A)

8/3 V

B)

4V

C)

6V

D)

8V

View Answer
72) Equivalent capacitance between A and B for circuit shown in figure.

A)

\[3\mu F\]

B)

\[2\text{ }\mu F\]

C)

\[4\text{ }\mu F\]

D)

8 µF

View Answer
73) Lengths of two wires are 50 cm, 100 cm respectively and their diameters are 1 mm, 2 mm then ratio between their specific resistances is

A)

1:2

B)

1:1

C)

2 :1

D)

1:4

View Answer
74) A torch battery consisting of two cells of 1.45 V and an internal resistance 0.15\[\Omega \] each cell sending currents through the filament of the lamps having resistance 1.5 \[\Omega .\] The value of current will be.

A)

16.11 A

B)

1.611 A

C)

0.1611 A

D)

2.6 A

View Answer
75) Two wires of same material and same lengths having cross-sections 3:1. If resistance of thicker wire is \[10\,\Omega \] and both are joined in series then equivalent resistance is

A)

\[10\,\Omega \]

B)

\[20\,\Omega \]

C)

\[30\,\Omega \]

D)

\[40\,\Omega \]

View Answer
76) In the measurement of a resistance by Wheatstone bridge the known and the unknown resistances are interchanged to neutralise

A)

end error

B)

index error

C)

error due to thermoelectric effect

D)

random error

View Answer
77) Equivalent resistance between A and B of circuit shown in figure.

A)

\[25\,\Omega \]

B)

\[35\,\Omega \]

C)

\[10\,\Omega \]

D)

\[5\,\Omega \]

View Answer
78) Resistances of \[6\,\Omega \] each are connected in the manner shown in adjoining figure. With the current 0.5 A as shown in figure, the potential difference \[{{\text{V}}_{\text{P}}}\text{-}{{\text{V}}_{\text{Q}}}\] is

A)

3.5V

B)

6.0V

C)

3.0V

D)

7.2V

View Answer
79) Which of the following are true when the cells are connected in series ?

A)

Current capacity decreases

B)

Current capacity increases

C)

The emf decrease

D)

The emf increases

View Answer
80) 34 kcal heat is liberated when \[1\text{ }g\text{ }{{H}_{1}}(ECE=1.044\times {{10}^{-8}})\] is converted into water. Minimum voltage required for it is

A)

0.75 V

B)

1.5 V

C)

3.0V

D)

4.5V

View Answer
81) Emf of lead accumulator after complete charging is

A)

2.0V

B)

1.8V

C)

1.5V

D)

2.2V

View Answer
82) ECE is equal to that mass of substance which is deposited on electrode in half sec by current

A)

5 A

B)

6 A

C)

8A

D)

2A

View Answer
83) Ratio of resistance of two bulbs 40 W and 60 W connected across 220 V source is

A)

3:2

B)

3:8

C)

4:3

D)

9:4

View Answer
84) If current is passed through Sb-Bi thermocouple then

A)

heat is produced at junction where current is from Sb the Bi

B)

heat is absorbed at junction where current is from Sb to Bi

C)

Both junction will become hot

D)

Both junction will become cold

View Answer
85) 100 W-220 V bulb is connected to 110 V source. then power consumed is

A)

25 W

B)

50 W

C)

100 W

D)

200 W

View Answer
86) Thermo emf of a couple is \[3\mu \text{ }V{{/}^{0}}C\] if temperature of cold junction is 20'C and thermo emf is increased to 0.3 mV the r. temperature of hot junction

A)

\[80{}^\circ C\]

B)

\[100{}^\circ C\]

C)

\[120{}^\circ C\]

D)

\[140{}^\circ C\]

View Answer
87) A coil has 25 turns and 10 cm radius. If it carries a 4 A current, then magnetic field at its centre is

A)

\[6.28\times {{10}^{-5}}\text{T}\]

B)

\[6.28\times {{10}^{-3}}\text{T}\]

C)

\[6.28\times {{10}^{-4}}\text{T}\]

D)

\[6.28\times {{10}^{-2}}\text{T}\]

View Answer
88) A and B are two concentric circular conductors of centre 0 and carrying currents \[{{\text{I}}_{\text{1}}}\]and \[{{\text{I}}_{2}}\] as shown in the figure. The ratio of their radii is 1: 2 and ratio of the flux densities at 0 due to A and B is 1 : 3.The value of \[{{\text{I}}_{1}}\text{/}{{\text{I}}_{2}}\]will be

A)

1/6

B)

¼

C)

1/2

D)

1/3

View Answer
89) A power line carrying 10 A current from east to west in earth's magnetic field of 10-T, then force acting on its 1 m length is

A)

zero

B)

\[{{10}^{-2}}N\]

C)

\[{{10}^{-3}}N\]

D)

\[{{10}^{-4}}N\]

View Answer
90) If an electron moving with the kinetic energy of \[6\times {{10}^{-16}}J\] enters perpendicularly into the magnetic field of intensity \[6\times {{10}^{-3}}Wb/\text{ }{{m}^{2}},\] then the radius of the path described by it will be

A)

3.42cm

B)

4.23cm

C)

5.17cm

D)

7.7cm

View Answer
91) A conducting circular loop of radius r carries a constant current \[\text{I}\text{.}\] It is placed in a uniform magnetic field, such that B is perpendicular to the plane of the loop. The magnetic force acting on the loop is given by

A)

\[IrB\]

B)

\[2\pi IrB\]

C)

zero

D)

\[\pi IrB\]

View Answer
92) Emf of generator is 6V and internal resistance is 0.5\[k\,\Omega .\] If internal resistance of voltmeter is 2.5 \[k\,\Omega .\] then reading of voltmeter must be

A)

10-3V

B)

1V

C)

5V

D)

10 V

View Answer
93) In a tangent galvanometer a current of 0.1 A produces a deflection of \[30{}^\circ C\]. The current required to produce a deflection of \[60{}^\circ \] will be

A)

0.6 A

B)

0.5 A

C)

0.4 A

D)

0.3 A

View Answer
94)  If magnetic flux linked with a coil is given by \[\phi =5{{t}^{2}}+3t+16.\] Then, induced emf in 4th sec is

A)

10 V

B)

-10 V

C)

-43V

D)

-33V

View Answer
95) Self inductance of coil is L if it is covered with a medium of permeability u, then self inductance becomes

A)

L

B)

\[\mu \,\text{L}\]

C)

\[\mu {{\,}^{\text{2}}}\text{L}\]

D)

\[\,\text{L/}\mu \]

View Answer
96) A copper rod of length; is rotated about one end perpendicular to the uniform magnetic field B with the constant angular velocity\[\omega .\]The induced emf between the two ends is

A)

\[B\omega {{l}^{2}}\text{/2}\]

B)

\[B\omega {{l}^{2}}\]

C)

\[2B\omega {{l}^{2}}\]

D)

zero

View Answer
97) The reactance of a coil when used in the domestic AC power supply (220 V, 50 cycles/s) is 50 Q. The inductance of the coil is nearly

A)

2.2 H

B)

0.22 H

C)

1.6 H

D)

0.16 H

View Answer
98) In L-C-R circuit \[{{V}_{L}}={{V}_{C}}={{V}_{R}}=\] 10 V if C is short circuited then voltage across L will be

A)

\[\text{10/}\sqrt{\text{2}}\,\text{V}\]

B)

\[20\sqrt{\text{2}}\,\text{V}\]

C)

\[10\sqrt{\text{2}}\]

D)

\[10\,\text{V}\]

View Answer
99)  A coil of resistance R and inductance L is connected to a battery of emf E volts. The final current in the coil is

A)

\[\frac{E}{R}\]

B)

\[\frac{E}{L}\]

C)

\[\sqrt{\left( \frac{E}{{{R}^{2}}+{{L}^{2}}} \right)}\]

D)

\[\sqrt{\left( \frac{EL}{{{R}^{2}}+{{L}^{2}}} \right)}\]

View Answer
100) Which quantity is increased in step down transformer ?

A)

Current

B)

Voltage

C)

Power

D)

Frequency

View Answer
101) For an electron impossible combination of quantum number is

A)

\[n=3,l=2,{{m}_{l}}=-2,{{m}_{s}}=+\frac{1}{2}\]

B)

\[n=3,l=2,{{m}_{l}}=-3,{{m}_{s}}=+\frac{1}{2}\]

C)

\[n=4,l=0,{{m}_{l}}=-3,{{m}_{s}}=-\frac{1}{2}\]

D)

\[n=5,l=3,{{m}_{l}}=0,{{m}_{s}}=-\frac{1}{2}\]

View Answer
102) The energy of an electron in nth orbit of hydrogen atom is

A)

\[\frac{13.6}{{{n}^{4}}}eV\]

B)

\[\frac{13.6}{{{n}^{3}}}eV\]

C)

\[\frac{13.6}{{{n}^{2}}}eV\]

D)

\[\frac{13.6}{n}eV\]

View Answer
103) Which of the following is not isoelectronic?

A)

\[N{{a}^{+}}\]

B)

\[M{{g}^{2+}}\]

C)

\[{{O}^{2-}}\]

D)

\[C{{l}^{-}}\]

View Answer
104) The number of unpaired electrons is maximum in (Atomic no. \[Ti=22,V=23,Cr=24,Fe=26)\])

A)

\[Fe\]

B)

\[Cr\]

C)

\[Ti\]

D)

\[V\]

View Answer
105) On moving from left to right in the second period along the periodic table the gram atomic volume of the element

A)

increases with constant velocity

B)

remains unchanged

C)

first increases and then decreases

D)

decreases

View Answer
106) Which of the following is the correct order of the size of iodine species?

A)

\[I>{{I}^{-}}>{{I}^{+}}\]

B)

\[{{I}^{-}}>I>{{I}^{+}}\]

C)

\[{{I}^{+}}>I>{{I}^{-}}\]

D)

\[I>{{I}^{+}}>{{I}^{-}}\]

View Answer
107) First ionisation potential of \[Be\] and B will be

A)

\[8.8\] and \[8.8\]

B)

\[6.6\] and \[6.6\]

C)

\[6.6\] and \[8.8\]

D)

\[8.8\] and \[6.6\]

View Answer
108) Which of the following electronic configuration will have maximum IP difference between II nd and IIIrd ionisation potential?

A)

\[1{{s}^{2}}2{{s}^{2}}2{{p}^{6}}3{{s}^{1}}\]

B)

\[1{{s}^{2}}2{{s}^{2}}2{{p}^{6}}3{{s}^{2}}\]

C)

\[1{{s}^{2}}2{{s}^{2}}2{{p}^{6}}\]

D)

\[1{{s}^{2}}2{{s}^{2}}2{{p}^{5}}\]

View Answer
109) Which of the following is true for a reaction in which all the products are liquid?

A)

\[\Delta H=\Delta E\]

B)

\[\Delta H=\Delta W\]

C)

\[\Delta H>\Delta E\]

D)

None of these

View Answer
110) Cell reaction is spontaneous when

A)

\[\Delta {{G}^{o}}\] is negative

B)

\[\Delta {{G}^{o}}\] is positive

C)

\[\Delta E_{red}^{o}\]is positive

D)

\[\Delta E_{red}^{o}\] is negative

View Answer
111) At \[{{27}^{o}}C\]latent heat of fusion of a compound is \[2930\text{ }J/mol,\] then entropy change is

A)

\[9.77J/mol-K\]

B)

\[10.77\text{ }J/mol-K\]

C)

\[9.07\text{ }J/mol-K\]

D)

\[0.977\text{ }J/mol-K\]

View Answer
112) For the reaction,\[{{C}_{2}}{{H}_{5}}OH(l)+3{{O}_{2}}(g)\xrightarrow{{}}2C{{O}_{2}}(g)+3{{H}_{2}}O(l)\] Which one is true?

A)

\[\Delta H=\Delta E-RT\]

B)

\[\Delta H=\Delta E+RT\]

C)

\[\Delta H=\Delta E+2RT~\]

D)

\[\Delta H=\Delta E-2RT~\]

View Answer
113) \[1.1\]moles of A and \[2.2\] moles of B are mixed in a container of one litre volume to obtain the equilibrium \[A+2B\rightleftharpoons 2C+D.\].     At equilibrium 0.2 moles of C are formed. The equilibrium constant for the above reaction is

A)

\[0.001\]

B)

\[0.002\]

C)

\[0.003\]

D)

\[0.004\]

View Answer
114) In which solution/solvent the solubility of \[AgCl\] is minimum?

A)

\[0.01\text{ }M\text{ }NaCl\]

B)

\[0.01\text{ }M\,\,CaC{{l}_{2}}\]

C)

Pure water

D)

\[0.001\text{ }M\,\,AgN{{O}_{3}}\]

View Answer
115) The volume strength of \[1.5\,N\,\,{{H}_{2}}{{O}_{2}}\] solution is

A)

\[8.4\]

B)

\[4.8\]

C)

\[5.2\]

D)

\[8.8\]

View Answer
116) Which one of the following salts gives an acidic solution in water?

A)

\[C{{H}_{3}}COONa\]

B)

\[N{{H}_{4}}Cl\]

C)

\[NaCl\]

D)

\[C{{H}_{3}}COON{{H}_{4}}\]

View Answer
117) A cell, with cell constant \[0.4\text{ }c{{m}^{-1}},\] has the resistance of 40 ohm of a \[0.01\text{ }M\]solution of an electrolyte, then the molar conductivity in \[oh{{m}^{-1}}\text{ }c{{m}^{2}}\text{ }mo{{l}^{-1}}\]will be

A)

\[{{10}^{4}}\]

B)

\[{{10}^{3}}\]

C)

\[{{10}^{2}}\]

D)

\[1\]

View Answer
118) \[{{H}_{2}}{{O}_{2}}\] on oxidation gives

A)

\[{{O}^{2-}}\]

B)

\[O{{H}^{-}}\]

C)

\[O_{2}^{-}\]

D)

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

View Answer
119) If the standard electrode potential for the cell \[Zn|Z{{n}^{2+}}(aq)||C{{u}^{2+}}(aq)|Cu\] is \[1.10V\]then the maximum work done by this cell will be

A)

\[-106.15\text{ }kJ\]

B)

\[~-212.30\text{ }kJ\]

C)

\[-318.45\text{ }kJ\]

D)

\[-424.60\text{ }kJ\]

View Answer
120) The oxidation states of sulphur in the anions \[SO_{3}^{2-},{{S}_{2}}O_{4}^{2-}\] and \[{{S}_{2}}O_{6}^{2-}\] follow the order

A)

\[{{S}_{2}}O_{4}^{2-}<SO_{3}^{2-}<{{S}_{2}}O_{6}^{2-}\]

B)

\[SO_{3}^{2-}<{{S}_{2}}O_{4}^{2-}<{{S}_{2}}O_{6}^{2-}\]

C)

\[{{S}_{2}}O_{4}^{2-}<{{S}_{2}}O_{6}^{2-}<SO_{3}^{2-}\]

D)

\[{{S}_{2}}O_{6}^{2-}<{{S}_{2}}O_{4}^{2-}<SO_{3}^{2-}\]

View Answer
121) \[3A\xrightarrow{{}}2B,\] rate of reaction \[\frac{+d(B)}{dt}\]is equals to

A)

\[-\frac{3}{2}\frac{d(A)}{dt}\]

B)

\[-\frac{2}{3}\frac{d(A)}{dt}\]

C)

\[-\frac{1}{3}\frac{d(A)}{dt}\]

D)

\[+2\frac{d(A)}{dt}\]

View Answer
122) \[2A\xrightarrow{{}}B+C\] It would be a zero order reaction when

A)

the rate of reaction is proportional to square of concentration of A

B)

the rate of reaction remains same at any concentration of A

C)

the rate remains unchanged at any concentration of B and C

D)

the rate of reaction doubles if concentration of B is increased to double

View Answer
123) The activation energy for a simple chemical reaction \[A\xrightarrow{{}}B\]is \[{{E}_{a}}\] in forward direction. The activation energy for reverse reaction

A)

is negative of \[{{E}_{a}}\]

B)

is always less than \[{{E}_{a}}\]

C)

can be less than or more than \[{{E}_{a}}\]

D)

is always double of \[{{E}_{a}}\]

View Answer
124) The reaction \[A\xrightarrow{{}}B\] follows first order kinetics. The time taken for \[0.8\text{ }mole\]of A to produce 0.6 mole of B is\[1\text{ }h\]. What is the time taken for conversion of \[0.9\text{ }mole\]of A to produce \[0.675\text{ }mole\]of B?

A)

\[1h\]

B)

\[0.5\text{ }h\]

C)

\[0.25\text{ }h\]

D)

\[2\text{ }h\]

View Answer
125) Which of the following exhibits highest solubility in water?

A)

\[N{{H}_{3}}\]

B)

\[P{{H}_{3}}\]

C)

\[As{{H}_{3}}\]

D)

\[Sb{{H}_{3}}\]

View Answer
126) Chlorine cannot displace

A)

fluorine from \[NaF\]

B)

iodine from \[NaI\]

C)

bromine from \[NaBr\]

D)

None of these

View Answer
127) Very dilute nitric acid reacts with zinc to form. zinc nitrate and

A)

ammonium nitrate

B)

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

C)

\[NO\]

D)

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

View Answer
128) The ionic radii of \[{{N}^{3-}},{{O}^{2-}},{{F}^{-}}\] and \[N{{a}^{+}}\] follow the order

A)

\[{{N}^{3-}}>{{O}^{2-}}>{{F}^{-}}>N{{a}^{+}}\]

B)

\[{{N}^{3-}}>N{{a}^{+}}>{{O}^{2-}}>{{F}^{-}}\]

C)

\[N{{a}^{+}}>{{O}^{2-}}>{{N}^{3-}}>{{F}^{-}}\]

D)

\[{{O}^{2-}}>{{F}^{-}}>N{{a}^{+}}>{{N}^{3-}}\]

View Answer
129) The structure of ionic compound with Schottky defects has

A)

same number of cationic and anionic vacancies

B)

anionic vacancy and interstitial anion

C)

cationic vacancies

D)

cationic vacancies and interstitial cation

View Answer
130) If a pentavalent impurity is mixed in the crystal-lattice of germanium then the semiconductor formed will be

A)

p-type semiconductor

B)

n-type semiconductor

C)

(i) and (ii) both

D)

None of the above

View Answer
131)  A compound formed by elements X and Y crystallises in a cubic structure in which the X atoms are at the corners of a cube and the Y atoms are at the face centres. The formula of the compound is

A)

\[X{{Y}_{3}}\]

B)

\[{{X}_{3}}Y\]

C)

\[XY\]

D)

\[X{{Y}_{2}}\]

View Answer
132) In a face centred cubic lattice, a unit cell a shared equally by how many unit cells?

A)

\[4\]

B)

\[2\]

C)

\[6\]

D)

\[8\]

View Answer
133) Acetic acid dissolved in benzene shows molecular weight

A)

\[60\]

B)

\[120\]

C)

\[180\]

D)

\[240\]

View Answer
134) The vapour pressure decreases by \[10\text{ }mm\] of \[Hg\]when mole fraction of solute in a solution is\[0.2\] If the vapour pressure decreases to \[20\text{ }mm\]of \[Hg\]then the mole fraction of solute will be

A)

\[0.2\]

B)

\[0.4\]

C)

\[0.6\]

D)

\[0.8\]

View Answer
135) Volume of \[C{{O}_{2}}\]obtained by the complete decomposition of \[9.85\text{ }g\] \[BaC{{O}_{3}}\] is

A)

\[2.24\text{ }L\]

B)

\[1.12L\]

C)

\[0.84\text{ }L\]

D)

\[0.56\text{ }L\]

View Answer
136) During osmosis, flow of water through a semipermeable membrane is

A)

from both sides of semipermeable membrane with equal flow rate

B)

from solution having lower concentration only

C)

from solution having higher concentration only

D)

None of the above

View Answer
137) What is the entropy change (in \[J{{K}^{-1}}\,\,mo{{l}^{-1}}\]) when one mole of ice is converted into water at \[{{0}^{o}}C\]? (The enthalpy change for the conversion of ice to liquid water is \[6.0\text{ }kJ\text{ }mo{{l}^{-1}}\]at\[{{0}^{o}}C\]).

A)

\[20.13\]

B)

\[2.013\]

C)

\[2.198\]

D)

\[21.98\]

View Answer
138) The molar heat capacity of water at constant pressure, is \[75J\,\,{{K}^{-1}}\text{ }mo{{l}^{-1}}\]. When \[1.0\text{ }kJ\]of heat is supplied to \[100\text{ }g\]of water which is free to expand, the increase in temperature of water is

A)

\[1.2K\]

B)

\[2.4\text{ }K\]

C)

\[4.8\text{ }K\]

D)

\[6.6\text{ }K\]

View Answer
139) Which of the following pairs of a chemical reaction is certain to result in a spontaneous reaction?

A)

Endothermic and decreasing disorder

B)

Exothermic and increasing disorder

C)

Endothermic and increasing disorder

D)

Exothermic and decreasing disorder

View Answer
140) Identify the correct statement for change of Gibbs energy for a system \[(\Delta {{G}_{system}})\] at constant temperature and pressure

A)

If \[\Delta {{G}_{system}}=0,\] the system has attained equilibrium

B)

If \[\Delta {{G}_{system}}=0,\] the system is still moving in a particular direction

C)

If \[\Delta {{G}_{system}}=0,\] the process is not spontaneous

D)

If \[\Delta {{G}_{system}}=0,\]the process is spontaneous

View Answer
141) In electrolysis of \[NaCl\]when \[Pt\] electrode is taken then \[{{H}_{2}}\] is liberated at cathode while with \[Hg\]electrode it forms sodium amalgam

A)

\[Hg\] is more inert than \[Pt\]

B)

more voltage is required to reduce \[{{H}^{+}}\] at \[Hg\] than at \[Pt\]

C)

\[Na\]is dissolved in \[Hg\] while it does not dissolve in \[Pt\]

D)

concentration of \[{{H}^{+}}\] ions is larger when P\[Pt\] electrode is taken

View Answer
142) On the basis of the information available from the reaction\[\frac{4}{3}Al+{{O}_{2}}\xrightarrow{{}}\frac{2}{3}A{{l}_{2}}{{O}_{3}},\,\Delta G=-827\,kJ\,mo{{l}^{-1}}\] of \[{{O}_{2}}\], the minimum emf required to carry out an electrolysis of \[A{{l}_{2}}{{O}_{3}}\]is \[(F=96500C\,\,mo{{l}^{-1}})\]

A)

\[2.14V\]

B)

\[4.28V\]

C)

6.42V

D)

\[8.56V\]

View Answer
143) The standard emf of a galvanic cell involving cell reaction with \[n=2\] is found to be \[0.295\text{ }V\]at \[{{25}^{o}}C\]. The equilibrium constant of the reaction would be

A)

\[2.0\times {{10}^{11}}\]

B)

\[4.0\times {{10}^{12}}\]

C)

\[1.0\times {{10}^{2}}\]

D)

\[1.0\times {{10}^{10}}\] (Given,\[F=96500\text{ }C\text{ }mo{{l}^{-1}};\] \[R=8.314\text{ }J{{K}^{-1}}\text{ }mo{{l}^{-1}}\])

View Answer
144) 44.          \[4.5g\] of aluminium (at. mass 27 u) is deposited at cathode from \[A{{l}^{3+}}\] solution by a certain quantity of electric charge. The volume of hydrogen produced at STP from \[{{H}^{+}}\]ions in solution by the same quantity of electric charge will be

A)

\[44.8\text{ }L\]

B)

\[11.2L\]

C)

\[22.4\text{ }L\]

D)

\[5.6\text{ }L\]

View Answer
145) The time of completion of \[90%\] of a first order reaction is approximately

A)

1.1 times that of half-life

B)

2.2 times that of half-life

C)

3.3 times that of half-life

D)

4.4 times that of half-life

View Answer
146) When a biochemical reaction is carried out in laboratory from outside of human body in the absence of enzyme than rate of reaction obtained is \[{{10}^{-6}}\] times, then activation energy of reaction in the presence of enzyme is

A)

\[6/RT\]

B)

P is required

C)

different from, \[{{E}_{a}}\] obtained in laboratory

D)

can't say any things

View Answer
147) The rate of reaction between two reactants A and B decreases by a factor of 4 if the concentration of reactant B is doubled. The order of this reaction with respect to reactant B is

A)

\[2\]

B)

\[-1\]

C)

\[1\]

D)

\[-2\]

View Answer
148) In a first-order reaction \[A\xrightarrow{{}}B,\]if fc is rate constant and initial concentration of reactant A is \[0.5\text{ }M\]then the half-life is

A)

\[\frac{In\,\,2}{k}\]

B)

\[\frac{0.693}{0.5}\]

C)

\[\frac{\log \,2}{2k}\]

D)

\[\frac{\log \,2}{k\sqrt{0.5}}\]

View Answer
149) Which ion is colorless?

A)

\[C{{r}^{4+}}\]

B)

\[S{{c}^{3+}}\]

C)

\[T{{i}^{3+}}\]

D)

\[{{V}^{4+}}\]

View Answer
150) Which of the following statement is not correct?

A)

\[La{{(OH)}_{3}}\] is less basic than \[Lu{{(OH)}_{3}}\].

B)

In lanthanide series ionic radius of \[L{{u}^{3+}}\] ion decreases.

C)

\[La\] is actually an element of transition series rather lanthanide.

D)

Atomic radius of \[Zr\] and Hf are same because of lanthanide contraction.

View Answer
151) Four successive members of the first row transition elements are listed below with their atomic numbers. Which one of them is expected to have the highest third ionisation enthalpy?

A)

Vanadium \[(Z=23)\]

B)

Manganese \[(Z=25)\]

C)

Chromium \[(Z=24)\]

D)

Iron \[(Z=26)\]

View Answer
152) Which of the following will replace \[B{{r}_{2}}\] from the aqueous solution having bromide ion?

A)

\[C{{l}_{2}}\]

B)

\[I_{3}^{\bigcirc -}\]

C)

\[{{I}_{2}}\]

D)

\[C{{l}^{\bigcirc -}}\]

View Answer
153) If \[2.0\text{ }g\]of a radioactive substance has half-life of 7 days, the half-life of \[1\text{ }g\]sample is

A)

7 days

B)

14 days

C)

28 days

D)

35 days

View Answer
154) \[_{n}{{X}^{m}}\] emit one a-and two P-particles. It is converted into

A)

\[_{n}{{X}^{m-4}}\]

B)

\[_{n-1}{{X}^{m-1}}\]

C)

\[_{n}{{Z}^{m-4}}\]

D)

None of these

View Answer
155) \[-{{[NH{{(C{{H}_{2}})}_{6}}NHCO{{(C{{H}_{2}})}_{4}}]}_{n}}-\] is a

A)

addition polymer

B)

thermosetting polymer

C)

homopolymer

D)

copolymer

View Answer
156) Isoprene is a valuable substance for making

A)

propene

B)

liquid fuel

C)

synthetic rubber

D)

petrol

View Answer
157) Enzymes are made up of

A)

edible proteins

B)

proteins with specific structure

C)

nitrogen containing carbohydrates

D)

carbohydrates

View Answer
158) According to the adsorption theory of catalysis. the speed of the reaction increase because

A)

the concentration of reactant molecules at the active centres of the catalyst becomes high due to adsorption

B)

in the process of adsorption, the activation energy of the molecules becomes large

C)

absorption produces heat which increases the speed of the reaction

D)

adsorption lowers the activation energy of the reaction

View Answer
159) In the metallurgy of which of the following cupellation process is used?

A)

Copper

B)

Silver

C)

Iron

D)

Aluminium

View Answer
160) Cryolite is used in the electrolytic extraction of aluminium

A)

to obtain more aluminium

B)

to decompose bauxite

C)

to protect anodes

D)

as a reducing agent

View Answer
161) 18 carat gold contains

A)

\[18%\] gold

B)

\[24%\] gold

C)

\[75%\] gold

D)

\[60%\] gold

View Answer
162) The brass is an alloy of

A)

gold and copper

B)

silver and zinc

C)

copper and zinc

D)

copper and aluminium

View Answer
163) Which of the following metals will not form an amalgam?

A)

Gold

B)

Silver

C)

Zinc

D)

Iron

View Answer
164) Which of the following is pseudo halogen?

A)

\[I{{F}_{7}}\]

B)

\[{{(CN)}_{2}}\]

C)

\[ICl_{2}^{-}\]

D)

\[I_{3}^{-}\]

View Answer
165) The element which liberates oxygen gas from water is

A)

\[P\]

B)

\[Na\]

C)

\[F\]

D)

\[I\]

View Answer
166) Which element from group V gives most basic compound with hydrogen?

A)

Nitrogen

B)

Bismuth

C)

Arsenic

D)

Phosphorus

View Answer
167) Which is the weakest acid out of \[HF,\] \[HCl,\] \[HBr\]and\[HI\]?

A)

\[HF\]

B)

\[HCl\]

C)

\[HBr\]

D)

\[HI\]

View Answer
168) The molecular formula of bleaching powder is

A)

\[CaC{{l}_{2}}\]

B)

\[C{{a}_{2}}OC{{l}_{2}}\]

C)

\[CaOC{{l}_{2}}\]

D)

\[CaC{{l}_{2}}.CaOCl\]

View Answer
169) The strongest oxidising agent amongst \[{{F}_{2}},\] \[C{{l}_{2}};\]\[B{{r}_{2}}\] and \[{{I}_{2}}\] is

A)

\[{{F}_{2}}\]

B)

\[{{I}_{2}}\]

C)

\[C{{l}_{2}}\]

D)

\[B{{r}_{2}}\]

View Answer
170) Point out in which of the following properties oxygen differs from the rest of the members of its family (Group-VIA)?

A)

High value of ionisation energies

B)

Oxidation states (2, 4, 6)

C)

Polymorphism

D)

Formation of hydrides

View Answer
171) Which of the following properties increases on going down from F to I in group VII-A of the periodic table?

A)

Electronegativity

B)

Volatile nature

C)

Ionic radius

D)

Oxidising power

View Answer
172) The oxidation state of oxygen is zero in

A)

\[CO\]

B)

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

C)

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

D)

\[{{H}_{2}}{{O}_{2}}\]

View Answer
173) A solution of sodium metal in liquid ammonia is a strong reducing agent due to the presence of

A)

sodium atoms

B)

sodium hydride

C)

sodium amide

D)

solvated electron

View Answer
174) A mixture containing \[C{{u}^{2+}}\] and \[N{{i}^{2+}}\] can be separated for identification by

A)

passing \[{{H}_{2}}S\] in acid medium

B)

passing \[{{H}_{2}}S\] in alkaline medium

C)

passing \[{{H}_{2}}S\] in neutral medium

D)

passing \[{{H}_{2}}S\] in dry mixture

View Answer
175) The indicator used in the titration of acetic add with sodium hydroxide for quantitative estimation is

A)

phenolphthalein

B)

methyl orange

C)

methyl red

D)

a mixture of methyl red and methyl orange

View Answer
176) A compound has the empirical formula \[C{{H}_{2}}O\]. Its vapour density is 30. Its molecular formula is

A)

\[{{C}_{2}}{{H}_{4}}{{O}_{2}}\]

B)

\[{{C}_{2}}{{H}_{6}}O\]

C)

\[{{C}_{2}}{{H}_{6}}{{O}_{2}}\]

D)

\[{{C}_{2}}{{H}_{4}}O\]

View Answer
177) The IUPAC name of the compound \[C{{H}_{3}}-\overset{C{{H}_{3}}}{\mathop{\overset{|}{\mathop{C}}\,}}\,H-\underset{{{C}_{2}}{{H}_{5}}}{\mathop{\underset{|}{\mathop{C}}\,}}\,H-C{{H}_{3}}\]is

A)

\[2-ethyl-3-methyl\text{ }butane\]

B)

\[2,3-dimethyl\text{ }pentane\]

C)

\[2-methyl-3-ethyl\text{ }butane\]

D)

\[3,4-dimethyl\text{ }pentane\]

View Answer
178) Out of the following fractions of petroleum the one having the lowest boiling point is

A)

kerosene oil

B)

diesel oil

C)

gasoline

D)

heavy oil

View Answer
179) Coordination number of Fe in the complexes \[{{[Fe{{(CN)}_{6}}]}^{4-}},{{[Fe{{(CN)}_{6}}]}^{3-}}\]and \[{{[FeC{{l}_{4}}]}^{-}}\] would be respectively

A)

\[6,3,4\]

B)

\[6,6,4\]

C)

\[2,3,3\]

D)

\[6,4,6\]

View Answer
180) Methoxy methane and ethanol are

A)

functional isomers

B)

chain isomers

C)

optical isomers

D)

geometrical isomers

View Answer
181) Most stable ion is

A)

\[{{C}_{6}}{{H}_{5}}CH_{2}^{+}\]

B)

\[{{(C{{H}_{3}})}_{3}}-{{C}^{+}}\]

C)

\[{{(C{{H}_{3}})}_{2}}C{{H}^{+}}\]

D)

\[C{{H}_{3}}CH_{2}^{+}\]

View Answer
182) Formation of 2-butene as major product by dehydration of 2-butanol is according to

A)

Markownikoff?s rule

B)

Saytzeffrule

C)

Peroxide effect

D)

Anti-Markownikoff?s rule

View Answer
183) \[64\text{ }g\]of an organic compound contains \[24\text{ }g\]of carbon, \[\text{8 }g\] of hydrogen and the rest oxygen. The empirical formula of the compound is

A)

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

B)

\[{{C}_{2}}{{H}_{4}}O\]

C)

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

D)

\[{{C}_{2}}{{H}_{8}}{{O}_{2}}\]

View Answer
184) \[[Pt{{(N{{H}_{3}})}_{4}}C{{l}_{2}}]B{{r}_{2}}\] and \[[Pt{{(N{{H}_{3}})}_{4}}B{{r}_{2}}]C{{l}_{2}}\] are related to each other as

A)

optical isomers

B)

coordinate isomers

C)

ionisation isomers

D)

linkage isomers

View Answer
185) Which one of the following substances is used as an anti-knock compound?

A)

Tetra ethyl lead

B)

Lead tetrachloride

C)

Lead acetate

D)

Ethyl acetate

View Answer
186) How many isomeric butanes are there?

A)

\[2\]

B)

\[3\]

C)

\[4\]

D)

\[5\]

View Answer
187) Ethene gives with acidic \[KMn{{O}_{4}}\] solution

A)

ethylene glycol

B)

ethylene oxide

C)

formaldehyde

D)

acetaldehyde

View Answer
188) Which of the following is an organo-metallic compound?

A)

Lithium ethoxide

B)

Ethyl lithium

C)

Lithium acetate

D)

Lithium carbide

View Answer
189) When phenol is distilled with \[Zn\] dust it gives

A)

benzaldehyde

B)

benzoic acid

C)

toluene

D)

benzene

View Answer
190) Ethane is formed by the reaction of methyl iodide and sodium metal in dry ether solution. This reaction is known as

A)

Clemmensen's reduction

B)

Kolbe's reaction

C)

Wurtz reaction

D)

Cannizaro's reaction

View Answer
191) At normal room temperature iodoform is

A)

volatile liquid

B)

thick viscous liquid

C)

gas

D)

solid

View Answer
192) The compound added to prevent chloroform to form phosgene gas (poisonous gas) is

A)

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

B)

\[C{{H}_{3}}OH\]

C)

\[C{{H}_{3}}COC{{H}_{3}}\]

D)

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

View Answer
193) The formula of freon-12 is

A)

\[CCl{{F}_{3}}\]

B)

\[C{{H}_{2}}C{{l}_{2}}\]

C)

\[CC{{l}_{2}}{{F}_{2}}\]

D)

\[C{{H}_{2}}{{F}_{2}}\]

View Answer
194) The reaction of benzaldehyde with alkali gives

A)

phenol + sodium benzoate

B)

benzene + benzyl alcohol

C)

benzyl alcohol + sodium benzoate

D)

phenol + benzene

View Answer
195) The reaction \[{{C}_{2}}{{H}_{5}}ONa+Br{{C}_{2}}{{H}_{5}}\xrightarrow{{}}\]\[{{C}_{2}}{{H}_{5}}-O-{{C}_{2}}{{H}_{5}}+NaBr\]is called

A)

Frank land reaction

B)

Wurtz reaction

C)

Williamson's synthesis

D)

Cannizaro reaction

View Answer
196) Diethyl ether on heating with cone. HI gives two moles of

A)

ethyl iodide

B)

ethanol

C)

iodoform

D)

methyl iodide

View Answer
197) Positive Fehling test is shown by

A)

acetaldehyde

B)

acetone

C)

benzaldehyde

D)

acetophenone

View Answer
198) \[RCON{{H}_{2}}+B{{r}_{2}}+KOH\xrightarrow{{}}\text{Amine}\]This reaction is

A)

Carbyl amine reaction

B)

Mustard oil reaction

C)

Hofmann bromide reaction

D)

Cannizzaro reaction

View Answer
199) Which of the following is reducing agent?

A)

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

B)

\[Zn+HCl\]

C)

\[Sn+HCl\]

D)

All of these

View Answer
200) Reduction of an aldehyde gives

A)

primary alcohol

B)

monocarboxylic acid

C)

secondary alcohol

D)

tertiary alcohol

View Answer
201) Cells of the epithelial tissue rest on a basement membrane, which is made up of

A)

mono saccharides

B)

muco polysaccharides

C)

disaccharides

D)

lipids

View Answer
202) The cells of a tissue are similar in

A)

structure

B)

function

C)

origin

D)

Both [a] and [b]

View Answer
203) The intercellular matrix is negligible or absent in which of the following tissues?

A)

Connective tissue

B)

Epithelial tissue

C)

Muscular tissue

D)

Cardiac tissue

View Answer
204) The basement membrane acts as

A)

plasma membrane

B)

plasmalemma

C)

Both [a] and [b]

D)

None of these

View Answer
205) The filaments arising from desmosomes are called

A)

tonofibril

B)

tonofilament

C)

Both [a] and [b]

D)

None of these

View Answer
206) Pseudo stratified epithelium is always

A)

single layered

B)

double layered

C)

multilayered

D)

uncertain

View Answer
207) Most of the glands of the body are of

A)

holocrine type

B)

merocrine type

C)

apocrine type

D)

None of these

View Answer
208) Pyruvic acid before combining with oxaloaceric acid of Krebs' cycle becomes

A)

lactic acid

B)

acetoacetic acid

C)

cis-aconitic acid

D)

acetyl Co-A

View Answer
209) Dissociation curve shifts to the right when

A)

\[C{{O}_{2}}\] concentration decreases

B)

\[C{{O}_{2}}\]concentration increases

C)

\[{{O}_{2}}\]concentration decreases

D)

\[\text{C}{{\text{l}}^{-}}\] concentration increases

View Answer
210) Which of the following glands is present in frog's skin and not in rabbit's skin?

A)

Sebaceous gland

B)

Sweat gland

C)

Mucous gland

D)

Moll's gland

View Answer
211) Cutaneous glands are

A)

gastric glands

B)

sebaceous glands

C)

thyroid gluids

D)

thymus glands

View Answer
212) Teeth are absent in

A)

fishes

B)

reptiles

C)

frogs

D)

turtle

View Answer
213) Ivory of teeth is

A)

enamel

B)

dentine

C)

Both [a] and [b]

D)

None of these

View Answer
214) In the gut of a mammal, haustra and taeniae are the parts of

A)

rectum

B)

colon

C)

caecum

D)

ileum

View Answer
215) Space between incisor and cheek teeth in rabbit is

A)

diapause

B)

diastema

C)

dialysis

D)

diapedesis

View Answer
216) Taste buds are absent in

A)

foliate papillae

B)

circumvallate papillae

C)

fungiform papillae

D)

fili form papillae

View Answer
217) Which one respires through gills ?

A)

Crocodile

B)

Whale

C)

Frog

D)

Prawn

View Answer
218) Fish brought out of water dies because of

A)

absence of pressure

B)

inability to respire

C)

inability to feed

D)

rise in temperature

View Answer
219) Skin is an accessory organ of respiration in

A)

human

B)

frog

C)

rabbit

D)

lizard

View Answer
220) In Pheretima, lymph glands produce

A)

phagocytic cells

B)

lymphocytic cells

C)

amoebocytic cells

D)

oxyntic cells

View Answer
221) How many lateral hearts are in Pheretima

A)

4

B)

8

C)

16

D)

12

View Answer
222) Four pairs of pulsatile heart in Pheretima are located in segments

A)

7, 9, 12 and 13

B)

11,14, 17 and 18

C)

10,13,16 and 17

D)

4, 5,10 and 13

View Answer
223) Open circulatory system is observed in

A)

cockroach

B)

frog

C)

fish

D)

reptiles

View Answer
224) Single circuit circulatory system is characteristic of

A)

fishes

B)

amphibians

C)

aves

D)

mammals

View Answer
225) Which of the following are uricotelic animals ?

A)

Rohu and frog

B)

Lizard and crow

C)

Camel and frog

D)

Earthworm and eagle

View Answer
226) In gout patients, high level of which of the following is found in blood?

A)

Urea

B)

Uric add

C)

Cholesterol

D)

Amino acid

View Answer
227) Excretion of nitrogenous waste products in semisolid form occurs in

A)

ureotelic animals

B)

ammonotelic animals

C)

uricotelic animals

D)

ammonites

View Answer
228) The phenomenon, which represents terrestrial mode (dry habitat) of life, is

A)

ammonotelism

B)

ureotelism

C)

uricotelism

D)

All of these

View Answer
229) Aquatic reptiles are

A)

ammonotelic

B)

ureotelic over land

C)

ureotelic

D)

ureotelic in water

View Answer
230) Ammonia is the chief excretory substance in

A)

camel and whale

B)

cartilaginous fishes

C)

whale and tortoise

D)

fresh water fishes

View Answer
231) The chief nitrogenous waste in urine of rabbit or terrestrial mammals is

A)

urea

B)

uric acid

C)

ammonia

D)

None of these

View Answer
232) The correct sequence of meninges from outer to the inner side is

A)

Arachnoid-piamater-duramater

B)

Arachnoid-duramater-piamater

C)

Piamater-arachnoid-duramater

D)

Duramater-arachnoid-piamater

View Answer
233) On the basis of body organization, animals are grouped as

A)

Metazoa and Eumetazoa

B)

Protozoa and Parazoa

C)

Parazoa and Metazoa

D)

Protozoa and Metazoa

View Answer
234) Which one of the following cells form the lining of brain ?

A)

Ependymal cells

B)

Neurons

C)

Schwann cells

D)

Neurilemma

View Answer
235) Cerebrospinal fluid is produced by

A)

ependymal cells

B)

choroid plexuses

C)

neuroglial cells

D)

neurons

View Answer
236) The ventricles of the brain are filled with

A)

cerebrospinal fluid

B)

lymph

C)

blood

D)

amniotic fluid

View Answer
237) Which one of the following phenomenon is not common to both oestrous and menstrual cycles?

A)

Growth of ovarian follicles under the influence of FSH and LH

B)

Formation of corpus luteum in the ovarian follicles.

C)

Sexual receptivity limited to a definite period in the cycle

D)

Regulation of cycles by estrogen and progesterone

View Answer
238) For ovulation in reflex ovulators

A)

coitus is not necessary

B)

coitus is necessary

C)

plenty of food is necessary

D)

plenty of food is not necessary

View Answer
239) Secondary sexual characters in females develop in response to hormone

A)

relaxin

B)

progesterone

C)

estrogen

D)

gonadotropin

View Answer
240) The period of restoration of uterine epithelium is called

A)

menstrual phase

B)

proliferative phase

C)

secretory or luteal phase

D)

None of the above

View Answer
241) Which one of the following exhibits menstruation ?

A)

Tiger

B)

Chimpanzee

C)

Civet cat

D)

None of these

View Answer
242) Glenoid cavity is found in

A)

pelvic girdle

B)

pectoral girdle

C)

skull

D)

humerus

View Answer
243) Axis vertebra is identified by

A)

olecranon process

B)

odontoid process

C)

sigmoid notch

D)

odontoblast

View Answer
244) When the intensity of light is low during night the light is detected by

A)

rods

B)

cones

C)

lens

D)

Both [a] and [b]

View Answer
245) Colourblindness results from

A)

absence of rods

B)

absence of cones

C)

absence of eyelids

D)

inverted retina

View Answer
246) Who is the "Father of Endocrinology" ?

A)

Whittaker

B)

Einthoven

C)

Pasteur

D)

T Addison

View Answer
247) Steroid is a

A)

thyroid acid

B)

vitamin-A

C)

cholesterol

D)

easter and fatty acid

View Answer
248) The feedback control mechanism is related with

A)

bile secretion

B)

\[\text{HCl}\]secretion

C)

hormonal secretion

D)

hering breuer reflex

View Answer
249) All functions of the body are regulated and integrated by

A)

respiratory system

B)

digestive system

C)

neuroendocrine system

D)

excretory system

View Answer
250) Which of the following does not secrete any hormone ?

A)

Ovary

B)

Testis

C)

Spleen/liver

D)

Pancreas

View Answer
251) The name second messenger is given to

A)

ATP

B)

Cyclic-AMP

C)

GTP

D)

Both [a] and [b]

View Answer
252) Endocrine glands produce or action of endocrine gland is mediated through

A)

hormones

B)

enzymes

C)

minerals

D)

vitamins

View Answer
253) The word 'hormone' means

A)

to move

B)

to exdte

C)

to initiate

D)

to increase

View Answer
254) In which of the following organisms hormones are normally absent?

A)

Monkey

B)

Cat

C)

Cockroach

D)

Bacteria

View Answer
255) Which of the following vitamins is Necessary for blood clotting ?

A)

Vitamin-A

B)

Vitamin-E

C)

Vitamin-C

D)

Vitamin-K

View Answer
256) Deficiency of vitamin-'C' causes

A)

beri beri

B)

rickets

C)

scurvy

D)

night blindness

View Answer
257) The hardest substance of vertebrate body is

A)

keratin

B)

enamel

C)

dentine

D)

chondrin

View Answer
258) The term blastocyst is applied to the blastula of which one of the following ?

A)

Kangaroo

B)

Platypus

C)

Monkey

D)

Both [a] and [b]

View Answer
259) Substances synthesized during growth are

A)

protoplasmic

B)

apoplasmic

C)

Both [a] and [b]

D)

nucleic acid

View Answer
260) Growth in the first 10-13 years of age is controlled by

A)

somatotrophic hormone

B)

thyroxin

C)

thymosin

D)

gonadotropic hormone

View Answer
261) In old age, there is decrease in amount of urine output and difficulty in micturition it is due to

A)

increase in number of nephrons

B)

increase in glomerular filtration

C)

decrease in number of nephrons and glomerular filtration

D)

Both [a] and [b]

View Answer
262) Growth is an irreversible process seen at all organizational levels. It consists of

A)

organ growth

B)

subcellular growth

C)

cell growth

D)

All of the above

View Answer
263) When growth takes place only by increase in volume of existing cells it is called as

A)

auxetic growth

B)

multiplicative growth

C)

accretionary growth

D)

differential growth

View Answer
264) The following cells cannot be grown under tissue culture conditions

A)

hela cells

B)

leucocytes

C)

kidney cells

D)

nerve cells

View Answer
265) Growth in most warm blooded vertebrates is

A)

determinate

B)

indeterminate

C)

uncontrolled

D)

None of these

View Answer
266) Wilkins X-ray diffraction showed the diameter of the DNA helix as

A)

\[10\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\]

B)

\[20\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\]

C)

\[30\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\]

D)

\[40\,\,\overset{\text{o}}{\mathop{\text{A}}}\,\]

View Answer
267) The number of autosomes in man is

A)

22 pairs

B)

11 pairs

C)

43 pairs

D)

23 pairs

View Answer
268) A normal metaphase chromosome with a middle centromere is

A)

metacentric

B)

sub-metacentric

C)

acrocentric

D)

telocentric

View Answer
269) Lampbrush chromosomes are found inside

A)

salivary glands of Drosophila

B)

salivary glands of silk moth

C)

oocytes of frog

D)

nucleus of man

View Answer
270) Depending upon size and centromere position the 46 chromosomes have been divided into a number of groups

A)

6

B)

5

C)

7

D)

10

View Answer
271) Chromosome number is

A)

fixed for a species

B)

fixed for an ecosystem

C)

fixed for a community

D)

fixed for a biosphere

View Answer
272) The twenty third pair of chromosomes in man is known as

A)

chromatid

B)

heterosome

C)

autosome

D)

gene

View Answer
273) The careers of hereditary material are

A)

chromosomes

B)

gene

C)

gametes

D)

gametocytes

View Answer
274) In man, the normal number of chromosomes are

A)

42

B)

44

C)

46

D)

48

View Answer
275) The genetic material of virus is

A)

DNA

B)

RNA

C)

Both [a] and [b]

D)

DNA or RNA

View Answer
276) The chromosomes as thread like structures in nucleus was first described by

A)

Mendel

B)

Strasburger

C)

Darwin

D)

Levitzky

View Answer
277) Genes are made up of

A)

histones

B)

lipoproteins

C)

polynucleotides

D)

hydrocarbons

View Answer
278) The function of chromosomes of carrying the genetic information from one cell generation to another is performed by

A)

RNA

B)

DNA

C)

histones

D)

calcium

View Answer
279) In chromosomes, the material controlling heredity is

A)

DNA

B)

histones

C)

chromocentres

D)

RNA

View Answer
280) Sex ratio in a species indicates the numerical relation between the number of

A)

male and female producing gametes

B)

black and white

C)

unisexual and bisexual

D)

None of the above

View Answer
281) The aggregate of processes that determine the size and composition of any population is called

A)

population dispersal

B)

population dynamics

C)

population explosion

D)

population density

View Answer
282) Intracellular digestion is found in the

A)

protozoans only

B)

porifers only

C)

in some coelenterates only

D)

All of the above

View Answer
283) Radial symmetry is usually exhibited in an which

A)

have one opening of alimentary canal

B)

have colliery mode of feeding

C)

are attached to the substratum

D)

live in water

View Answer
284) Absence of excretory organs, great power regeneration and exclusively marine animals belong to the phylum

A)

Mollusca

B)

Echinodermata

C)

Fishes

D)

Arthropoda

View Answer
285) Select the correct statement

A)

birds are poikilothermic

B)

flatworms are coelomic animal

C)

earthworm is metameric ally segmented

D)

fishes are radially symmetrical

View Answer
286) Characteristic features such as four-chambered heart, feather and pneumatic bone is applicable to the class of vertebrate

A)

Cyclostomata

B)

Aves

C)

Reptilia

D)

Mammalia

View Answer
287) Which of the following animals is predaceous

A)

Pheretima

B)

Nereis

C)

Hirudinaria

D)

None of these

View Answer
288) Taxon is the

A)

name of a taxonomy journal

B)

name of a branch of taxonomy

C)

a rank of classification as phylum, class, order, species

D)

group of similarly constituted organisms

View Answer
289) Which of the following is the oldest living fossil?

A)

Architeuthis

B)

Neopilina

C)

Nautilus

D)

Limulus

View Answer
290) The non-nucleated, unicellular organisms of Whittaker's (1969) classification are included in the kingdom

A)

Protista

B)

Monera

C)

Animalia

D)

Plantae

View Answer
291) In human evolution, which is most recent?

A)

Middle paleolithic

B)

Upper Paleolithic

C)

Neolithic

D)

Mesolithic

View Answer
292) The concept of sudden genetic change, which breeds true in a species is represented as

A)

inheritance of acquired characters

B)

natural selection

C)

law of inheritance

D)

mutation

View Answer
293) Silkworm is a

A)

fly

B)

worm

C)

moth

D)

beetle

View Answer
294) Who is referred to as father of pearl industry ?

A)

Iwanovsky

B)

Louis Pasteur

C)

Kokichi Mikimoto

D)

Harvey

View Answer
295) The biological name of the Java man is

A)

Homo erectus

B)

Homo sapiens

C)

Homo habilis

D)

Pithecanthropus erectus

View Answer
296) plasmodium in man is in no cleated by

A)

Anopheles male

B)

Anopheles female

C)

Both [a] and [b]

D)

Culex female

View Answer
297) Smoking addiction is harmful because it produces polycyclic aromatic hydrocarbons which cause

A)

reduction in oxygen transport

B)

increase in blood pressure

C)

cancer

D)

retardation of growth of foetus

View Answer
298) Alcohol addiction is harmful because it causes

A)

protein depositions in liver

B)

deposition of extra fat in liver

C)

rise in blood sugar level

D)

cancer

View Answer
299) In which state is the Kanha National Park?

A)

Rajasthan

B)

Uttar Pradesh

C)

Madhya Pradesh

D)

Assam

View Answer
300) The lion tailed monkeys Malaca silenus are found only in these regions

A)

Kaziranga and other pans of Assam

B)

Eastern ghats and Chennai

C)

Western ghats including Travancore Mysore

D)

Himalayan mountains

View Answer
301) The resolution of light microscope could be improved to 1.5 times by using.

A)

Red light and immersion oil between the specimen and objective

B)

Blue light and glycerine between the specimen and objective

C)

Blue light and immersion oil between specimen and objective

D)

Day light and air between specimen and objective

View Answer
302) Separation of proteins on the basis of their being polyelectrolytes can be brought about by

A)

centrifugation

B)

electrophoresis

C)

chromatography

D)

crystallography

View Answer
303) Taylor (1958) studied chromosome replication by using radioactive

A)

uridine

B)

thymidine

C)

histones

D)

phosphate

View Answer
304) The amount of which of the following elements greatest in protoplasm

A)

hydrogen

B)

oxygen

C)

nitrogen

D)

carbon

View Answer
305) Normal pH of protoplasm is

A)

7.8

B)

6.8

C)

5

D)

6.5

View Answer
306) The theory strongly advocating the morphological nature of protoplasm is

A)

granular theory of Altmann

B)

fibrical theory of Flemming

C)

nuclear theory of Altmann

D)

colloidal theory of Wilson Fischer and Hardy

View Answer
307) In rotation type of cyclosis, the cytoplasmic matrix flows in

A)

one direction

B)

two opposite directions

C)

different directions

D)

side wise

View Answer
308) The function of centrosome is

A)

to inhibit cell division

B)

to initiate cell division

C)

to increase protein synthesis

D)

None of the above

View Answer
309) At which stage of mitosis, chromatids separate and start moving towards poles?

A)

Prophase

B)

Metaphase

C)

Anaphase

D)

Telophase

View Answer
310) Micro bodies differ from lysosomes in that

A)

micro bodies are surrounded by a single unit membrane, while lysosome membrane is double

B)

micro bodies are surrounded by double membrane, while lysosome membrane is single unit

C)

micro bodies contain lytic enzymes, while lysosomes do not

D)

lysosomes contain lytic enzymes, while micro bodies do not

View Answer
311) The haploid complement of chromosomes of an organism constitutes

A)

genome

B)

genotype

C)

phenotype

D)

genetic system

View Answer
312) The cross used to ascertain whether the plant is homozygous or heterozygous is

A)

linkage cross

B)

reciprocal cross

C)

test cross

D)

monohybrid cross

View Answer
313) The dihybrid ratio in \[{{F}_{2}}\] generation is

A)

1: 1: 1 : 1

B)

2 : 1: 2

C)

3 :1

D)

9 : 3 : 3 :1

View Answer
314) Which of the following trait of garden pea studied by Mendel was recessive feature?

A)

Round seed shape

B)

Axial flower position

C)

Green seed colour

D)

Green pod colour

View Answer
315) Which of the following scientist rediscovered Mendel's theory ?

A)

T H Morgan

B)

W Bateson

C)

E Strasburger

D)

E Von Tschermak

View Answer
316) Which of the following is an example of pleiotropic gene ?

A)

Thalassemia

B)

Haemophilia

C)

Colour blindness

D)

Sickle cell anaemia

View Answer
317) By double fertilization, is formed

A)

endosperm

B)

megaspore

C)

seed

D)

fruit

View Answer
318) In split genes, the coding sequences are called

A)

cistrons

B)

operons

C)

exons

D)

introns

View Answer
319) Extra nuclear genes occur in

A)

plastids and inherited

B)

plasmid and not inherited

C)

mitochondria and inherited by male

D)

mitochondria and inherited by female

View Answer
320) How many different types of genetically different gametes will be produced by a heterozygous plant having the genotype AA Bb Cc ?

A)

Two

B)

Four

C)

Six

D)

Nine

View Answer
321) Drosophila melanogaster has

A)

2 pairs of autosomes and 1 pair of as chromosomes

B)

3 pairs of autosomes and 1 pair of as chromosomes

C)

1 pair of autosome and 3 pairs of sea chromosomes

D)

2 pairs of autosomes and 2 pairs of sea chromosomes

View Answer
322) The four daughter cells derived from a single meiosis differ from each other due to

A)

difference in chromosome number

B)

crossing over only

C)

independent assortment of chromosomes

D)

crossing over as well as independent assortment of chromosomes

View Answer
323) In which kingdom, would you classify the archaea and nitrogen fixing organisms, if the five kingdom system of classification is used ?

A)

Plantae

B)

Fungi

C)

Protista

D)

Monera

View Answer
324) Which one of the following is correct for structure of cell wall of fungi and bacteria?

A)

Both have glycopeptide

B)

Both are made up of N-acetyl glycosamine

C)

Both are made up of N-acetyl muramic acid

D)

Both are made up of chitin

View Answer
325) Muramic acid is present in the cell wall of

A)

bacteria

B)

green algae

C)

red algae

D)

Rhizopus

View Answer
326) Most of the bacteria can tolerate high temperature due to

A)

type of cell wall

B)

cell organization

C)

homopolar bonds in their proteins

D)

absence of phospholipids in their walls

View Answer
327) For reproduction, endospores are formed in the following genera

A)

Bacillus and Clostridium

B)

Mucor and Bacillus

C)

Mono coccus and Clostridium

D)

Saccharomyces and Clostridium

View Answer
328) Plasmids are ideal vectors for gene cloning as they

A)

can be multiplied in a laboratory using enzymes

B)

can be multiplied by culturing

C)

are self-replicating

D)

replicate freely outside the bacterial cells

View Answer
329) Root nodules for nitrogen fixation in non leguminous trees are produced by species of the genus

A)

Rhizobium

B)

Azotobacter

C)

Frankia

D)

Thiobacillus

View Answer
330) Activity of one of the following bacteria is very helpful in the preparation and flavouring of tea leaves

A)

Bacillus subtilis

B)

Bacillus megatherium

C)

Bacillus aceti

D)

Bacillus radicicola

View Answer
331) Why surgical instruments are boiled in water before use?

A)

For killing the pathogens present on them

B)

So that doctors can use them easily

C)

Provides pleasure to the patient

D)

All the saprophytes die on the operative surface

View Answer
332) Pasteurization of milk involves heating for

A)

60 minute at about

B)

60 minute at about

C)

30 minute at about

D)

30 minute at about

View Answer
333) Which kingdom incorporates photoautotrophs, chemoautotrophs and heterotrophs?

A)

Monera

B)

Protista

C)

Plantae

D)

Both [b] and [c]

View Answer
334) Blue-green algae are placed in the kingdom

A)

Plantae

B)

Protista

C)

Fungi

D)

Monera

View Answer
335) 35.      Protozoan, Protista are differentiated on the basis of

A)

            Nuclei

B)

            size

C)

            shape

D)

            locomotory structures

View Answer
336)   Endoparasitic protistan protozoans belong to

A)

Sporozoa

B)

Ciliata

C)

Sarcodina

D)

Mastigophora

View Answer
337) The winged pollen grains are the characteristic feature of

A)

Cycas

B)

Ephedra

C)

Gnetum

D)

Pinus

View Answer
338) What is the similarity between gymnospenns and angiosperms?

A)

Phloem of both have companian cells

B)

Endosperm is formed before fertilization in both

C)

Origin of ovule and seed is similar in both

D)

Both have leaves, stem and roots

View Answer
339) Circinate venation is found in

A)

Cycas

B)

Fern

C)

Both [a] and [b]

D)

None of these

View Answer
340) In gymnosperm, the endosperm is

A)

haploid

B)

diploid

C)

triploid

D)

None of these

View Answer
341) Primitive types of stomata are found in the

A)

leaves of moss plant

B)

axis of the moss plant

C)

apophysis of capsule of moss

D)

All of the above

View Answer
342) Paraphysis in moss are

A)

one celled and club shaped

B)

multicelled and club shaped

C)

one celled and bottle shaped

D)

multicelled and bottle shaped

View Answer
343) The development of a sporophyte without fertilization from the vegetative cells of the gametophyte is called

A)

zygospory

B)

aplanospory

C)

apospory

D)

apogamy

View Answer
344) One of the following is not a method of asexual reproduction

A)

cutting

B)

grafting

C)

budding

D)

conjugation

View Answer
345) In Capsella, meiosis takes place during

A)

development of pollen grains

B)

development of egg

C)

gemination of zygote

D)

development of ovule

View Answer
346) Generally archesporium in an ovule is

A)

single celled and hypodermal in origin

B)

single celled and lies in the centre of the ovule

C)

single celled and terminal in origin

D)

many celled and lie in the centre

View Answer
347) When the pollen grains are not transferred from anthers to the stigma in flower due to the barrier of fence, it is referred as or when some natural barriers, exist between androecium and gynoecium to check self pollination, it is known as

A)

heterostyly

B)

herkogamy

C)

dichogamy

D)

cleistogamy

View Answer
348) Aerenchyma is found in

A)

lithophytes

B)

hydrophytes

C)

sciophytes

D)

xerophytes

View Answer
349) Collenchyma differs from sclerenchyma

A)

retaining protoplasm at maturity

B)

having thick walls

C)

having wide lumen

D)

being meristematic

View Answer
350) Water stomata are found in

A)

plants inhabiting humid region

B)

plants inhabiting dry regions

C)

all plants

D)

plants lacking normal stomata

View Answer
351) Multiple epidermis on dorsal and ventral side of the leaf is found in

A)

Zea mays

B)

Triticum aestivum

C)

Mangifera indica

D)

Nerium oleander

View Answer
352) The axillary buds arise

A)

endogenously from the pericycle

B)

exogenously from the tissues of the main growing point

C)

endogenously from the cambial tissues

D)

exogenously from the innermost cortex

View Answer
353) Potassium is useful in development of

A)

fibre

B)

pith

C)

parenchyma

D)

None of these

View Answer
354) Plants absorb sulphur in the form of

A)

\[S{{O}_{4}}\] from soil

B)

\[S{{O}_{2}}\] from air

C)

Both [a] and [b]

D)

\[S{{O}_{3}}\] from soil

View Answer
355) Grey spots of oat are caused by deficiency of

A)

Cu

B)

Zn

C)

Mn

D)

Fe

View Answer
356) Motile leaf in citrus plants is due to deficienp

A)

boron

B)

magnesium

C)

zinc

D)

None of these

View Answer
357) Nodules with nitrogen fixing bacteria present in roots of

A)

cotton

B)

gram

C)

wheat

D)

maize

View Answer
358) A pigment, which absorbed red and far-red light is

A)

phytochrome

B)

carotene

C)

cytochrome

D)

xanthophylls

View Answer
359) 85-90% of all photosynthesis of the world is carried out by

A)

shrubs

B)

herbs

C)

oceanic algae

D)

trees with large branches

View Answer
360) The role of phycobilins in photosynthes is to

A)

absorb and transfer energy to chlorophyll

B)

donate electrons to the electron transport system

C)

fix carbon dioxide

D)

carry hydrogen or electrons

View Answer
361) Chlorophyll-b differs from chlorophyll-a in the it does not

A)

CHO

B)

COOH

C)

\[C{{H}_{3}}\] and-CH

D)

None of these

View Answer
362) Plants do not store carbohydrate as glucose but do so as starch because glucose

A)

is unstable

B)

attracts herbivores

C)

will change nucleic acids

D)

alters osmotic balance

View Answer
363) If oxygen content is reduced to 1%, the rate of respiration becomes

A)

optimum

B)

minimum

C)

maximum

D)

None of these

View Answer
364) Oxidative phosphorylation is the formation of

A)

\[NADP{{H}_{2}}\] in respiration

B)

ATP in respiration

C)

\[NADP{{H}_{2}}\] in photosynthesis

D)

ATP in photosynthesis

View Answer
365) A typical anther wall has

A)

exothecium and endothecium

B)

endothecium and tapetum

C)

exothecium, endothecium and tapetum

D)

exothecium and tapetum

View Answer
366) The tissue of highest respiratory activity is

A)

meristems

B)

ground tissue

C)

phloem

D)

mechanical tissue

View Answer
367) Why do fruit juices turn bitter if kept in an open place for some time?

A)

Juices have something inside them which makes it bitter

B)

It is due to fermentation brought about by yeast cells

C)

It is due to the activity of fungi present in the atmosphere

D)

All of the above

View Answer
368) Which one belongs to hydrolase group?

A)

Amylase

B)

Transaminase

C)

Citrate synthetase

D)

Enolase

View Answer
369) Dry seeds can enduce higher temperature that the germinating seeds because

A)

dry seeds have more reserve food

B)

hydration makes the enzymes more sensitive to temperature

C)

dry seeds are hard

D)

the seedlings are tender

View Answer
370) Name of the enzyme that acts both as carboxylase at one time and oxygenase at another time

A)

Carbonic anhydrase

B)

PEP carboxylase

C)

RuBP carboxylase

D)

None of the above

View Answer
371) Enzymes, which act normally with in cells are ailed

A)

apoenzymes

B)

exoenzymes

C)

endoenzymes

D)

ferments

View Answer
372) A coenzyme is

A)

same enzyme that occurs in different tissues such as heart and muscle

B)

one that shares the function of other enzyme

C)

organic or inorganic in nature and helps activate metabolic enzymes

D)

organic non-protein in nature and helps to activate metabolic enzymes

View Answer
373) When food supply is poor, the rate of growth is

A)

fast

B)

slow

C)

intermediate

D)

nil

View Answer
374) Energy for the early growth of a developing bean embryo comes from

A)

sunlight

B)

water in the soil

C)

food in the soil

D)

leaves in the seed

View Answer
375) Plant response to environment is mainly through

A)

induction of dormancy

B)

abscission of parts

C)

synthesis of pigments

D)

growth

View Answer
376) Substances, which originate at the tip of stem, root and control the growth of different organs are

A)

enzymes

B)

hormones

C)

vitamins

D)

food substances

View Answer
377) Gibberellins induce

A)

flowering

B)

production of hydrolyzing enzymes in germinating seeds

C)

Both [a] and [c]

D)

hasten leaf senescence

View Answer
378) One of the preventive methods of fruit drop is by spraying

A)

auxin

B)

ethylene gas

C)

gibberellins

D)

cytokinin

View Answer
379) An important finding in Went's experiment was

A)

unequal distribution of elongation promoting substance in Avena coleoptile

B)

presence of elongation factor in all cells of root

C)

curvature of coleoptile is proportional to auxin concentration

D)

curvature occurred due to irregular elongation of cells

View Answer
380) A bird enters the mouth of crocodile and feed on parasitic leeches. The bird gets food and crocodile gets ribs of blood sucking leeches. Both the partners can live independently. Such an association is

A)

mutualism

B)

amensalism

C)

commensalism

D)

proto co-operation

View Answer
381) Which of the following species are restricted to a given area ?

A)

Sympatric species

B)

All opatric species

C)

Sibling species

D)

Endemic species

View Answer
382) The factor governing the structure of earth surface is

A)

topographic

B)

edaphic

C)

biotic

D)

temperature

View Answer
383) Excessive aerenchyma is characteristic of

A)

hydrophytes

B)

xerophytes

C)

mesophytes

D)

heliophytes

View Answer
384) Species are considered as

A)

real unit of classification devised by taxonomists

B)

real basic units of classification

C)

the lowest units of classification

D)

artificial concept of human mind, which cannot be defined in absolute terms

View Answer
385) Mark the correct pair

A)

plants growing in shady - heliophytes places

B)

plants growing in light   - sdophytes

C)

plants growing in saline - halophytes soil

D)

roots are absent         - xerophytes

View Answer
386) Ephemerals are xerophytes that are

A)

draught escapers

B)

true xerophytes

C)

draught resisting

D)

None of the above

View Answer
387) The sun loving plants are referred to as

A)

halophytes

B)

heliophytes

C)

heterotrophs

D)

heliophytes

View Answer
388) The lentic ecosystem includes, which of the following water?

A)

Rain

B)

Running

C)

Standing

D)

Gravitational

View Answer
389) Succulent xerophytes are likely to be found in

A)

tropical rain forest

B)

deciduous forest

C)

desert

D)

tundra

View Answer
390) Which alkaloids are present in opium ?

A)

Codeine

B)

Morphine

C)

Perthidine

D)

All of these

View Answer
391) Which of the following is used as local an aesthesia?

A)

Aloe

B)

Cocaine

C)

Calotropis latex

D)

None of the above

View Answer
392) Study of drug plants is known as

A)

Pharmacy

B)

Pharmacology

C)

Pharmacognosy

D)

Pharmaceutical chemistry

View Answer
393) The correct representation of the alkaloids obtained from opium is

A)

Morphine > Codeine > Pethidine

B)

Morphine < Codeine < Perthidine

C)

Morphine > Codeine > Perthidine

D)

Morphine < Codeine < Nicotine

View Answer
394) Cinchona plant is also known as

A)

prickly bark

B)

turmeric bark

C)

peruvian bark

D)

devil's dung bark

View Answer
395) Which is more suitable in jelly preparation?

A)

Sugar

B)

Salt

C)

Pectin

D)

Protein

View Answer
396) Botulism is a

A)

type of food poisoning due to saprophya Clostridium botulinum bacterium

B)

disease of man due to parasitic bacterium

C)

disease in various organisms

D)

disease of plants due to viruses

View Answer
397) In fruit preservation, which substance is used as preservative?

A)

Calcium carbonate

B)

Potassium metabisulphate

C)

Potassium nitrate

D)

Ammonium sulphate

View Answer
398) The main aim of plant breeding is

A)

to produce improved varieties

B)

to make soil fertile

C)

to control pollution

D)

to become more progressive

View Answer
399) Which cultivation method is most popular in Madhya Pradesh to cultivate rice?

A)

Intensive

B)

Dry

C)

Wet

D)

Tillage

View Answer
400) Dwarf wheats were developed by

A)

Vavilov

B)

Borlaug

C)

Swaminathan

D)

None of the above

View Answer