Statement 1 : The masses of vapour present over liquid H 2 O ( ℓ ) in two closed containers A and B, having free space of 1 litre and 3 litre respectively over the liquid at the same temperature, ar

Question

Statement 1 : The masses of vapour present over liquid $H_{2} O (ℓ)$ in two closed containers A and B, having free space of 1 litre and 3 litre respectively over the liquid at the same temperature, are in the ratio 1 : 3. (Assume ideal gas behaviour of the vapour.)

Statement 2 : The vapour pressure of a liquid depends on the volume of free space above it.

TestHub · Accepted Answer

The vapour pressure of water is the same in A and B (same T). Mass of vapour = PVM/RT is proportional to V, so the ratio is 1 : 3. Statement 1 is true.

Statement 2 is false: vapour pressure depends only on the liquid and the temperature, not on the free volume.

Answer: (C).

Chemistry - Ideal Gas Question with Solution | TestHub

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