A-LevelChemistryEquilibria9701/12 · Feb/Mar 2025 · Q101 Mark

Methanol is manufactured by reacting carbon dioxide and hydrogen together. CO2(g) + 3H2(g) ⇌ CH3OH(g) + H2O(g) ΔH = −49 kJ mol⁻¹ What increases the equilibrium yield of methanol in this process?

Aincreasing the pressure

Badding an excess of steam

Cadding a catalyst

Dincreasing the temperature

✓ Correct answer

A: increasing the pressure

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

Topic: Equilibria, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, Feb/Mar 2025 Paper 1 Variant 2, question 10.

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

In an experiment, 2.00 mol of hydrogen and 3.00 mol of iodine were heated together in a sealed container and allowed …

Ammonium sulfate, (NH₄)₂SO₄, and ammonium nitrate, NH₄NO₃, are used as fertilisers. These salts have different percen…

Which statements about reversible reactions are correct? 1 An increase in concentration of a reactant always increase…

Alkenes react with aqueous hydrogen bromide. The reaction proceeds via an intermediate carbocation. The more stable t…

A sample of 2.30 g of ethanol is mixed with an excess of aqueous acidified potassium dichromate(VI). The reaction mix…

Which compound gives both: an orange precipitate with 2,4-DNPH reagent and a yellow precipitate with alkaline I₂(aq)?