The r.m.s. speed of the molecules of a gas in a vessel is 200 m/s. if 25% of the gas leaks out of the vessel, at constant temperature, then the r.m.s. speed of the remaining molecules will be
400 m/s
150 m/s
100 m/s
200 m/s
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For hydrogen gas CP – CV = a, and for oxygen gas CP – CV = b, so that relation between a and b given by