MHT CET Medical202624 April 2026Morning ShiftChemistryStates of MatterActual
Which of the following relations is correct regarding rate of diffusion of a gas?
Options
- Adirectly proportional to its density
- Bdirectly proportional to its molecular mass
- Cdirectly proportional to the square of its molecular mass
- Dinversely proportional to the square root of its molecular mass
Correct answer
D. inversely proportional to the square root of its molecular mass
Step-by-step solution
According to Graham's law of diffusion, under identical conditions of temperature and pressure, the rate of diffusion of a gas is inversely proportional to the square root of its density or molecular mass. r 1 M where r is the rate of diffusion and M is the molecular mass of the gas. Therefore, the rate of diffusion is inversely proportional to the square root of its molecular mass. Answer: inversely proportional to the square root of its molecular mass