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Two gases A and B present separately in ...

Two gases A and B present separately in two vessels X & Y at the same temperature with molecular weights M & 2 M respectively are effused out. The orifice in vessel X is circular while that in Y is a square. If the radius of the circular orifice is equal to that of the length of the square orifice, the ration of rates of effusion of gas A to that of gas B is.

A

`sqrt(2 pi)`

B

`sqrt((pi)/(2))`

C

`2 pi`

D

`sqrt((2)/(pi))`

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