A-LevelChemistryNitrogen and sulfur9701/12 · May/June 2010 · Q361 Mark

Sulfur dioxide and sulfites are used in food preservation. Why are they used for this purpose? 1 They are reducing agents so retard the oxidation of food. 2 They inhibit the growth of aerobic bacteria. 3 They react with NO2(g) converting it to NO(g).

A1, 2 and 3 are correct

B1 and 2 only are correct

C2 and 3 only are correct

D1 only is correct

✓ Correct answer

B: 1 and 2 only are correct

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Topic: Nitrogen and sulfur, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, May/June 2010 Paper 1 Variant 2, question 36.

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