1.

The velocity of sound in diatomic gas is 300 m/s, the root mean square velocity of molecules is of order of :

Answer»

440 m/s
40 m/s
4000 m/s
4 m/s .

Solution :`C_(rms) = SQRT((3RT)/(M)) "" C_("SOUND") = sqrt((gamma RT)/(M)) `
`therefore (C_(rms))/(C_("sound")) = sqrt((3)/(gamma))`
` C_(rms) = 300 sqrt((3)/(1.44)) = 437 ms^(-1)`
Hence the correct choice is (a) .


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