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JAMB Chemistry 1982 Question 23

Question 23

Gas Laws

If the rate of diffusion of oxygen gas is taken as 1, what will be the rate of diffusion of methane whose relative molar mass is 16?

  1. A.2.0
  2. B.1.8
  3. C.1.4
  4. D.1.0
  5. E.0.5
Show the answer and explanation

Answer: C (1.4)

Explanation

Graham's law: rate ∝ 1/√M. Rate(CH4)/rate(O2) = √(32/16) = √2 ≈ 1.4.