A) \[{{H}_{2}}\]
B) \[{{N}_{2}}\]
C) He
D) \[{{O}_{2}}\]
Correct Answer: A
Solution :
Velocity \[\upsilon \propto \frac{1}{\sqrt{M}}\] where M=molecular wt. Molecular weight of \[{{H}_{2}}\] is minimum, velocity of sound is maximum in H2
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