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The vapour pressure of two liquids 'P' a...

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 mole of P and 2 mol of Q would be

A

140 torr

B

20 torr

C

68 torr

D

72 torr

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The correct Answer is:
D
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