A-LevelChemistryElectrochemistry9701/12 · May/June 2014 · Q171 Mark

When solid sodium iodide reacts with concentrated sulfuric acid, the products include NaHSO4, H2S, SO2 and S. In the formation of which product has the oxidation state of sulfur changed by a value of 8?

AH2S

BNaHSO4

DSO2

✓ Correct answer

A: H2S

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Topic: Electrochemistry, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, May/June 2014 Paper 1 Variant 2, question 17.

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