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The vapour pressure of two liquids P and...

The vapour pressure of two liquids P and Q are 80 and 60 torr respectively. The total vapour pressure of solution obtained by mixing 3 mol of P and 2 mol of Q would be.

A

72 torr

B

140 torr

C

68 torr

D

20 torr

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The correct Answer is:
A
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