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Questions  

 The root mean square speed of the molecules 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   here T becomes double and M decreases by 2 times vrms= 3R2TM2  = 2v

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