A-LevelChemistryElectrochemistry9701/12 · Feb/Mar 2025 · Q141 Mark

Copper reacts with nitric acid under certain conditions. The products are copper(II) nitrate, water and an oxide of nitrogen. 3 mol of copper reacts with exactly 8 mol of nitric acid. What is the oxidation state of nitrogen in the oxide produced?

A+1

B+2

C+3

D+4

✓ Correct answer

B: +2

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Topic: Electrochemistry, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, Feb/Mar 2025 Paper 1 Variant 2, question 14.

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