Which of the following changes decrease


Which of the following changes decrease the vapour pressure of water kept in a sealed vessel?

(a) Decreasing the quantity of water

(b) Adding salt to water

(c) Decreasing the volume of the vessel to one-half

(d) Decreasing the temperature of water


(b, d) Vapour pressure does not depend upon the quantity of water or size of the vessel. It decreases on adding salt to water or decreasing the

temperature of water.

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