51. Rate of diffusion of a gas is (a) Directly proportional to its density (b) Directly proportional to its molecular mass (c) Directly proportional to the square root of its molecular mass (d) Inversely proportional to the square root of its molecular mass
Solution : According to Graham's law of diffusion of gases, the rate of diffusion of a gas is inversely proportional to the square root of its molecular mass.
