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A and B are ideal gases. The molecular w...

A and B are ideal gases. The molecular weights of A and B are in the ratio of `1 : 4`. The pressure of a gas mixture containing equal weights of A and B is P atm. What is the partial pressure (in atm.) of B in the mixture

A

`p/5`

B

`p/2`

C

`p/2.5`

D

`(3p)/4`

Text Solution

Verified by Experts

Let weight `=x` gm for both A and B. If molecular mass of A is M then molecular mass of B would be 4M.
`implies P_(B)=chi_(B)P=(chi//4M)/(x//M+x//4M)xxP=P/5`
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