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Two liquids X and Y from an ideal soluti...

Two liquids X and Y from an ideal solution at`300K`, Vapour pressure of the Solution containing `1`mol of X and `3`mol of Y is `550`mmHg . At the same temperature, if `1` mol of Y is further added to this solution ,vapour pressur of the solutions increases by `100`mmHg Vapour pressure (in mmHg) of X and Y in their pure states will be,respectively

A

`300` and 400`

B

`400` and `600`

C

`500` and `600`

D

`200` and `300`

Text Solution

Verified by Experts

The correct Answer is:
B
`P_("total")=P_(A)^(@)x_(A)+P_(B)^(@)x_(A)`
`760=520x_(A)+1000(1-x_(A))`
`760=520x_(A)+1000-1000x_(A)`
`x_(A)=0.5`
mol `%=50%`
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