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Questions  

The root mean square speed.of the rnolecules of a diatomic gas is v. When the temperature is doubled, the molecules dissociate into two atoms. The new root mean square speed of the atom is

a
2v
b
v
c
2v
d
4v

detailed solution

Correct option is C

vrms = 3RTM      According to problem T will become T2 and M will become M2 so the value of vrms will increased by 4 = 2 times  i.e., new root mean square velocity will be 2v.

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