WAEC Chemistry 2015 Objective — Question 25
Question 25 of 50 from the West African Examinations Council (WAEC) Chemistry 2015 Objective paper, with the correct answer and a full explanation.
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Which of the following gases will diffuse most rapidly? [H=1.00, C=12.0, O=16.0, S=32.0, Cl=35.5]
- A. Cl₂
- B. SO₂
- C. CH₄Correct
- D. C₂H₆
Explanation
CH₄ has the lowest molar mass (16), so per Graham's law of diffusion, it diffuses most rapidly.
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