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A-LevelChemistryElectrochemistry9701/12 · Oct/Nov 2017 · Q331 Mark

Hydrogen sulfide can be oxidised to form sulfur dioxide. 2H2S + 3O2 → 2SO2 + 2H2O Which statements are correct? 1 The oxidation number of sulfur increases by 6. 2 The oxidation number of oxygen increases by 2. 3 The oxidation number of hydrogen decreases.

A1, 2 and 3 are correct
B1 and 2 only are correct
C2 and 3 only are correct
D1 only is correct

✓ Correct answer

D: 1 only is correct

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About this question

Topic
Electrochemistry, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source
A-Level Chemistry, Oct/Nov 2017 Paper 1 Variant 2, question 33.

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