1.

According to Graham's law at a given temperature the ratio of the rates of diffusion r_(A)//r_(B) of gases A and B is given by

Answer»

<P>`(p_(A)/p_(B))(M_(A)/M_(B))^(1/2)`
`(M_(A)/M_(B))(p_(A)/p_(B))^(1/2)`
`(p_(A)/p_(B))(M_(B)/M_(A))^(1/2)`
`(M_(A)/M_(B))(p_(B)/p_(A))^(1/2)`

ANSWER :C


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