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An ideal mixture of liquids A and B with...

An ideal mixture of liquids A and B with 2 moles of A and 2 moles of B has a total vapour pressure of 1 atm at a certain temperature. Another mixture with 1 mole of A and 3 moles of B has a vapour pressure greater than 1 atm. But if 4 moles of C are added to second mixture, the vapour pressure comes down to 1 atm. Vapour pressure of `C, P_(C)^(@)=0.8` atm. Calculate the vapour pressure of pure A and B :

A

`P_(A)^(@)=1.4 atm, P_(B)^(@)=0.7 atm`

B

`P_(A)^(@)=1.2 atm , P_(B)^(@)=0.6 atm`

C

`P_(A)^(@)=1.4 atm, P_(B)^(@)=0.6 atm`

D

`P_(A)^(@)=0.6 atm, P_(B)^(@)=1.4 atm`

Text Solution

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The correct Answer is:
D
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