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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

The correct Answer is:
a
Molecular weights of ideal gases A and B are in the ratio `1:4`.
`P_(B)=X_(B)P`
`X_(B)=n_(B)/(n_(A)+n_(B))= ((x/4))/((x/4)+(x/1))`
` implies P_(B)= [((x/4))/((x/4)+(x/1))]P=P/5`
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