At 400 K, the root mean square (rms) speed of a gas X of molecular weight 40 is equal to the most probable speed of

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Q 1167701685.     At 400 K, the root mean square (rms) speed of a gas X of molecular weight 40 is equal to the most probable speed of gas Y at 60 K. Find the molecular weight of the gas Y.
JEE 2009
A

12

B

2

C

8

D

4`

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