O-LevelChemistryRates of Reaction5070/12 · Oct/Nov 2018 · Q171 Mark

Solid ammonium chloride is heated. The gases ammonia and hydrogen chloride are formed. This is reaction 1. Ammonia gas is mixed with hydrogen chloride gas. Solid ammonium chloride is formed. This is reaction 2. Which statement is correct?

ABoth reaction 1 and reaction 2 are exothermic.

BReaction 2 is reversible.

CThe equation for reaction 1 is NH5Cl → NH4 + HCl.

DThe three substances involved in each reaction all have a simple molecular structure.

✓ Correct answer

B: Reaction 2 is reversible.

Oracle Prep sorts past-paper questions by topic, so you can drill Rates of Reaction and see which topics are most likely to come up next.

Topic: Rates of Reaction, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, Oct/Nov 2018 Paper 1 Variant 2, question 17.

Questions and mark schemes are from past examination papers and remain the copyright of the exam board. How Oracle Prep builds its content