O-LevelChemistryAcids, Bases & Salts5070/11 · Oct/Nov 2018 · Q221 Mark

The diagram shows the main stages in the manufacture of an ammonia-based fertiliser. What is happening in the process labelled X?

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AAmmonia is returned to the start of the process to shift the equilibrium towards the product.

BThe gases are cooled to cause ammonia to form a liquid.

CUnreacted hydrogen only is recycled.

DUnreacted hydrogen and nitrogen are recycled.

✓ Correct answer

D: Unreacted hydrogen and nitrogen are recycled.

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Topic: Acids, Bases & Salts, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, Oct/Nov 2018 Paper 1 Variant 1, question 22.

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