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X mL of H2 gas has effused through a ho...

X mL of `H_2` gas has effused through a hole in a container in 5 second. The time taken for the effusion of the same volume of the gas specified below under identical conditions is

A

X ml He : 10 seconds

B

X ml `O_2 : 20 seconds

C

X ml `CO_2` : 25 seconds

D

X ml `CO_2` : 20 seconds

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The correct Answer is:
B
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