engineering chemistry MCQ #3414

The ratio of the rates of diffusion of two gases is 2 : 1. What is the ratio of their molecular weights?

engineering chemistry MCQ #3414

  1. Question 1

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

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

    Answer: 1 : 4

    Explanation: Graham's law: r1/r2 = √(M2/M1), so (r1/r2)² = M2/M1 = 4/1, hence M1/M2 = 1/4.