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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
Let `M_(A) = a " and " M_(B) = 4a`
`w_(A) = w_(B) = m` (say)
`x_(B) = (m//4a)/(m//4a + m//a) = (1)/(5)`
`P_(B) = x_(B) xx P_("total") = P//5`
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