Q.

The vapour pressure of pure water at 75oC is 296 torr the vapour pressure lowering due to 0.1 m solute is

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0.533 torr

0.296 torr

0.333 torr

0.428 torr

answer is A.

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Detailed Solution

ΔP296=0.10.1+100018,where 100018=number of moles of water ∴ΔP=0.533 torr

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