O-LevelChemistryRates of Reaction5070/11 · May/June 2014 · Q201 Mark

Ammonia is made by a reversible reaction between nitrogen and hydrogen. N₂(g) + 3H₂(g) ⇌ 2NH₃(g) ΔH = −92 kJ/mol What is the effect of increasing the pressure in this process?

ALess heat is produced.

BMore ammonia is formed.

CMore nitrogen is present at equilibrium.

DThe reaction slows down.

✓ Correct answer

B: More ammonia is formed.

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Topic: Rates of Reaction, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, May/June 2014 Paper 1 Variant 1, question 20.

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