O-LevelChemistryAtomic Structure5070/12 · May/June 2015 · Q81 Mark

Which row shows correct statements about the speed at which a gas diffuses?

Ahigher molecular mass diffuses faster, diffusion is faster at higher temperatures

Bhigher molecular mass diffuses faster, diffusion is faster at lower temperatures

Clower molecular mass diffuses faster, diffusion is faster at higher temperatures

Dlower molecular mass diffuses faster, diffusion is faster at lower temperatures

✓ Correct answer

C: lower molecular mass diffuses faster, diffusion is faster at higher temperatures

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Topic: Atomic Structure, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, May/June 2015 Paper 1 Variant 2, question 8.

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