Question

The rms speed of the molecules of a gas in a vessel is 400 ms^–1. If half of the gas leaks out at constant temperature, the rms speed of the remaining molecules will be

• A. 800 ms^–1
• B. $400\sqrt{2}ms^{- 1}$
• C. 400 ms^–1
• D. 200 ms^–1

Answer 1

Answer: (C)

400 ms^–1

Answer 2

Root mean square velocity does not depends upon the quantity of gas. For a given gas and at constant temperature it always remains same.