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Question (31)

QN0038301

The root mean square velocity of hydrogen molecules at is . Then the r.m.s velocity of oxygen molecules at will be

(A)
(B)
(C)
(D)

Correct Answer: B

Explanation:

Root-mean square-velocity is given by

i.e.,

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Question (32)

QN0038302

The average transitional energy and the rms speed of molecules in a sample of oxygen gas at are and respectively. The corresponding values at are nearly (assuming ideal gas behaviour)

(A)
(B)
(C)
(D)

Correct Answer: D

Explanation:

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Question (33)

QN0038303

Maxwell's laws of distribution of velocities shows that

(A)
the number of molecules with most probable velocity is very large
(B)
the number of molecules with most probable velocity is very small
(C)
the number of molecules with most probable velocity is zero
(D)
the number of molecules with most probable velocity is exactly equal to 1

Correct Answer: A

Explanation:

Based on Maxwell's velocity distribution curve.

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Question (34)

QN0038304

At what temperature the mean speed of the molecule of hydrogen gas equals the escape speed from the earth?

(A)
(B)
(C)
(D)

Correct Answer: A

Explanation:

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Question (31)

The root mean square velocity of hydrogen molecules at is . Then the r.m.s velocity of oxygen molecules at will be

Explanation:

Link:

Question (32)

The average transitional energy and the rms speed of molecules in a sample of oxygen gas at are and respectively. The corresponding values at are nearly (assuming ideal gas behaviour)

Explanation:

Link:

Question (33)

Maxwell's laws of distribution of velocities shows that

Explanation:

Link:

Question (34)

At what temperature the mean speed of the molecule of hydrogen gas equals the escape speed from the earth?

Explanation:

Link:

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