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Two monoatomic ideal gases 1 and 2 of molecular masses m 1 and m 2 respectively are enclosed in separate containers kept at the same temperature. The ratio of the speed of sound in gas 1 to that in gas 2 is given by

1. 1 2 m m
2. 2 1 m m
3. 1 2 m m
4. 2 1 m m

Correct answer: 2 1 m m

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