Explanation
Correct option : option A and D
Explanation:
We know T∝n3 thus ,
T1T2∝(n1n2)3
81∝(n1n2)3
(because here T1T2 is 81)
⇒n1n2=21
thus the options in which n1=2n2 are the correct options.
Thus Option A and option D is correct .
Vrms=√3RTM
Vrms for helium =√3RT4
Vrms for argon =√3RT40
Vrms(helium)Vrms(Argon)=√10
=3.16
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