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Question

At the room temperature the velocity of sound in O2 gas is V. Then in mixture of H2 and O2 gas the speed of sound at same temperature :

A
will be less than V.
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B
will be more than V
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C
will be equal to V
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D
will becomes zero
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Solution

The correct option is A will be less than V.velocity of sound is given by :- V=√γRTM where M = Molar mass of gas in mediumthat B, V∝1√M (at same temperature T)The molar mass of O2 gas in less then the equivalent molar mass of mixture containing H2 and O2 (more gases mean more molar mass )as molar mass Increases, velocity of sound decreasesV′<V

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