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The incorrect statement is :

1. Vapour pressure of a liquid always increases by increasing temperature.
2. Vapour pressure onlydepends on temperature and not on the nature of substance.
3. Vapour pressure does not depend on the quantity of the liquid taken and the surface area of the liquid.
4. Vapour pressure is not a colligative property \& is independent of the concentration of the liquid.

Correct answer: Vapour pressure onlydepends on temperature and not on the nature of substance.

Solution

Vapour pressure depends on both temperature and the nature of the liquid because intermolecular forces differ from substance to substance. Stronger attractions lower vapour pressure at a given temperature, so the statement that it depends only on temperature is incorrect.

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