Question

Two containers A and B are partly filled with water and closed. The volume of A is twice that of B and it contains half the amount of water in B. If both are at same temperature, the water vapour in the containers will have pressure in the ratio of ___________

(a) 1:2

(b) 1:1

(c) 2:1

(d) 4:1

This question was posed to me in a job interview.

This interesting question is from Latent Heat in section Kinetic Theory of Gases of Engineering Physics I

Answer 1

The correct answer is (b) 1:1

Explanation: Vapour pressure does not depend on the amount of the substance. It depends on temperature only.