A-LevelChemistryElectrochemistry9701/12 · May/June 2024 · Q111 Mark

Nitrogen dioxide reacts with water. 2NO2 + H2O → HNO2 + HNO3 Which statement about this reaction is correct?

ABoth products are formed because oxygen atoms gain electrons.

BNitrogen atoms undergo disproportionation.

CThe oxidation number of hydrogen is increased.

DWater acts as an oxidising agent.

✓ Correct answer

B: Nitrogen atoms undergo disproportionation.

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

Topic: Electrochemistry, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, May/June 2024 Paper 1 Variant 2, question 11.

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

KMnO₄ is an oxidising agent. Its reaction with Fe²⁺ is shown in the following ionic equation. ...X...MnO₄⁻ + ......Fe…

The equations for three reactions involving chlorine or its compounds are listed. 1 2KClO₃ → 2KCl + 3O₂ 2 4KClO₃ → 3K…

The equation for a reaction of KClO3 is shown. 4KClO3 → KCl + 3KClO4 Which row is correct? disproportion…

Sulfur dioxide and oxygen react in the gas phase. 2SO₂(g) + O₂(g) ⇌ 2SO₃(g) ∆H = –197 kJ mol⁻¹ Which statements are c…

Three test-tubes, X, Y, and Z, each contain a small amount of water. • A small amount of NaCl is added to test-tube X…

Sodium chloride and sodium iodide react with concentrated sulfuric acid. Which statements are correct? 1 Sodium chlor…