If 240mL of a gas X diffuses through a p...

If 240mL of a gas X diffuses through a porous membrane in 20 min whereas the same volume of methane diffuses in 10 min at the same temperature and pressure, the molar mass in g `mol^(-1)` of gas X is

A

128

B

8

C

64

D

32

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The correct Answer is:

C

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