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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