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Q.16 A closed vessel contains a mixture of two
diatomic gases A and B. Molar mass of A is 16
times that of B and mass of gas A contained in
the vessel is 2 times that of B. Which of the
following statements are correct ?
(a) Average kinetic energy per molecule of A is
equal to that of B
(b) Root mean square value of translational
velocity of B is four times that of A
(c) Pressure exerted by B is eight times of that
exerted by A
(d) Number of molecules of B, in the cylinder,
is eight times that of A
(1) a (2) a, b
(3) a, b, c (4) a ,b, c, d
Q.17 Inter molecular potential energy is
A B
U = −
12 6
r r
A B
(a) Inter molecular force is F = −
13 6
r r
(b) Inter molecular separation at equilibrium
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2
=
⎛ A ⎞
⎜ ⎟⎠
⎝ B
(c) Minimum potential energy is = –
Correct answer is -
(1) a (2) b, c
(3) c (4) a,b,c
Q.18 In single slit diffraction
4A
2
B
2λD
(a) Width of the central maxima =
d
λ D
(b) Width of the first maxima =
d
λ D
(c) Width of the second maxima =
2d
Correct answer is -
(1) a (2) a, b
(3) a,b,c (4) None
Q.16 ,d can ik=k nks f}ijekf.od xSlksa A o B ds feJ.k
ls ;qDr gSA A dk eksyj nzO;eku B dk 16 xquk gS
rFkk ik=k esa Hkjh xSl A dk nzO;eku B dk 2 xquk
gSA fuEu esa ls dkSulk dFku lgh gS ?
(a) A dh izfr v.kq vkSlr xfrt ÅtkZ B ds cjkcj gS
(b) B ds LFkkukraj.k osx dk ek/; ewy osx A dk
pkj xquk
(c) B }kjk vkjksfir nkc] A }kjk vkjksfir nkc dk
vkB xquk gS
(d) flys.Mj esa B ds v.kqvksa dh la[;k A dh vkB
xquk gS
(1) a (2) a, b
(3) a, b, c (4) a ,b, c, d
Q.17 vUrjvkf.od fLFkfrt ÅtkZ gS -
A B
U = −
12 6
r r
A B
(a) vUrjvkf.od cy F = − gS
13 6
r r
2
(b) lkE;koLFkk ij vUrjvkf.od nwjh =
⎛ A ⎞
⎜ ⎟⎠
⎝ B
(c) U;wure fLFkfrt ÅtkZ = –
lgh mÙkj gS -
4A
gS 2
B
(1) a (2) b, c
(3) c (4) a,b,c
Q.18 ,dy fLyV foorZu esa
2λD
(a) dsUnzh; mfPp"B dh pkSM+kbZ =
d
λ D
(b) izFke mfPp"B dh pkSM+kbZ =
d
λ D
(c) f}rh; mfPp"B dh pkSM+kbZ =
2d
lgh mÙkj gS -
(1) a (2) a, b
(3) a,b,c (4) dksbZ ugha
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