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Time required to effuse V mL of H(2) gas...

Time required to effuse V mL of `H_(2)` gas through a porous wall at a constant temperature and pressure is 20 min. under the same conditions time required to effuse V mL of the following gases is-

A

He:28.28 min

B

`CO_(2):90.82`min

C

`CH_(4):60.52` min

D

`N_(2):74.83` min

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The correct Answer is:
A, D
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