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50 mL of each gas A and of gas B takes 1...

`50 mL` of each gas `A` and of gas `B` takes `150 and 200` seconds respectively for effusing through a pin hole under the similar conditon. If molecular mass of gas `B` is `36`, then the molecular mass of gas `A` will be

A

96

B

128

C

32

D

64

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The correct Answer is:
D
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