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A-LevelChemistryElectrochemistry9701/12 · May/June 2018 · Q81 Mark

Sulfur reacts with concentrated nitric acid in a redox reaction. S + 4HNO3 → SO2 + 4NO2 + 2H2O What are the changes in oxidation number of sulfur and of nitrogen in this reaction? [Table showing changes in oxidation number for sulfur and nitrogen]

A+2 -3
B+2 -1
C+4 -3
D+4 -1

✓ Correct answer

D: +4 -1

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About this question

Topic
Electrochemistry, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source
A-Level Chemistry, May/June 2018 Paper 1 Variant 2, question 8.

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