Chemistry · Oct / Nov 2018 · Paper 12 · Question 17
5070Reversible reactions and equilibrium
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.
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Correct answer: B. Reaction 2 is reversible.
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