Sound velocity is maximum in

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(A) The velocity of sound in an ideal gas is given by the formula $v = \sqrt{\frac{\gamma RT}{M}}$.From this relation,it is clear that $v \propto \fra

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$H_2$

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(A) The velocity of sound in an ideal gas is given by the formula $v = \sqrt{\frac{\gamma RT}{M}}$.From this relation,it is clear that $v \propto \frac{1}{\sqrt{M}}$,where $M$ is the molar mass of the gas.Comparing the molar masses of the given gases:$M(H_2) = 2 \ g/mol$$M(N_2) = 28 \ g/mol$$M(He) = 4 \ g/mol$$M(O_2) = 32 \ g/mol$Since $H_2$ has the minimum molar mass among the given options,the velocity of sound is maximum in $H_2$.

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