MDCAT Chemistry MCQ #4288

The ratio of the rates of diffusion of two gases is 2:1. The ratio of their molecular masses is

MDCAT Chemistry MCQ #4288

  1. Question 1

    Q1. The ratio of the rates of diffusion of two gases is 2:1. The ratio of their molecular masses is

    • A) 1:4
    • B) 4:1
    • C) 1:2
    • D) 2:1

    Answer: 1:4

    Explanation: According to Graham's law, rate ∝ 1/√M; so M1/M2 = (rate2/rate1)² = (1/2)² = 1/4.