Q.

The ratio of the speed of sound in nitrogen gas to that in helium gas, at 300 K is

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a

2/7

b

1/7

c

3/5

d

6/5

answer is C.

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Detailed Solution

Velocity of sound in gas v=γRTM⇒v∝γTM⇒vN2vHe=γN2γHe×MHeMH2=75R×453R×28=35
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