A-LevelChemistryNitrogen and sulfur9701/12 · Oct/Nov 2010 · Q311 Mark

When ammonia, NH₃, is produced in a school or college laboratory, it is usually dried before being collected. Which drying agents may be used to dry ammonia? 1 calcium oxide, CaO 2 phosphorus(V) oxide, P₄O₁₀ 3 concentrated sulfuric acid, H₂SO₄

A1, 2 and 3 are correct

B1 and 2 only are correct

C2 and 3 only are correct

D1 only is correct

✓ Correct answer

D: 1 only is correct

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Topic: Nitrogen and sulfur, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, Oct/Nov 2010 Paper 1 Variant 2, question 31.

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