Wave Mechanics Question 838

Question: Sound velocity is maximum in

[Pb. CET 2000; RPMT 2000]

Options:

A) $ H _{2} $

B) $ N _{2} $

C) $ He $

D) $ O _{2} $

Show Answer

Answer:

Correct Answer: A

Solution:

$ v=\sqrt{\frac{\gamma RT}{M}} $

Therefore $ v\propto \frac{1}{\sqrt{M}} $ . Since $ M $ is minimum for $ H _{2} $ so sound velocity is maximum in H2.