A-LevelChemistryNitrogen and sulfur9701/12 · May/June 2025 · Q81 Mark

In the Haber process, the reaction between the two gaseous reactants requires the use of a catalyst that contains a transition element. What is the metal and in which mole ratio do the gases react?

A[metal: Fe, mole ratio: 1:2]

B[metal: Fe, mole ratio: 1:3]

C[metal: V, mole ratio: 1:2]

D[metal: V, mole ratio: 1:3]

✓ Correct answer

B: [metal: Fe, mole ratio: 1:3]

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Topic: Nitrogen and sulfur, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, May/June 2025 Paper 1 Variant 2, question 8.

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