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Q.

The rms speed of N2 molecules in a gas is u If the temperature is doubled and the nitrogen molecules dissociate into nitrogen atoms, the rms speed becomes:

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a

u/2

b

2 u

c

4 u

d

14 u

answer is B.

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Detailed Solution

Urms=3RTMu1u2=n1T1n2T2=n×T2n×2T=14=12 u2=2u1=2u
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