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Question

Find the speed of sound in H2 gas if the speed of sound in O2 gas is 450 m/s at the same temperature.

A
1800 m/s
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B
1200 m/s
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C
1500 m/s
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D
1600 m/s
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Solution

The correct option is A 1800 m/s
We know that the velocity of sound in any medium is given by,
v=γRTM
Since temperature is same for both the gases and both the gases are diatomic,
So, vH2vO2=MO2MH2
vH2vO2=322=4
vH2=4×vO2=4×450=1800 m/s

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