A-LevelChemistryElectrochemistry9701/12 · Oct/Nov 2011 · Q111 Mark

The amount of titanium dioxide in an ore can be determined by using the following reaction. 3TiO2 + 4BrF3 → 3TiF4 + 2Br2 + 3O2 Which element increases in oxidation number in this reaction?

Abromine

Bfluorine

Coxygen

Dtitanium

✓ Correct answer

C: oxygen

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Topic: Electrochemistry, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, Oct/Nov 2011 Paper 1 Variant 2, question 11.

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