A vessel contains only two gas molecules. Which of the following relation is correct for RMS speed (u), average speed (c) and most probable speed (α) for the molecules?

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TestHub · Accepted Answer

The most probable speed α is a property of the Maxwell distribution; with only two molecules there is no distribution, so α cannot be predicted. For any two speeds, RMS ≥ mean, with c < u whenever the two speeds differ (equality only if both speeds happen to be identical). The best statement is (b). Confirms Ans (b).

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