1.

According to Graham's law at a given temperature the ratio of the rates of diffusionr_(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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