O-LevelChemistryAcids, Bases & Salts5070/11 · May/June 2013 · Q31 Mark

In which pair do neither of the gases change the colour of damp blue litmus paper?

Aammonia and hydrogen

Bammonia and hydrogen chloride

Ccarbon dioxide and chlorine

Dcarbon dioxide and sulfur dioxide

✓ Correct answer

A: ammonia and hydrogen

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Topic: Acids, Bases & Salts, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, May/June 2013 Paper 1 Variant 1, question 3.

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