Compare5 marksStandard
Compare the reactions of chloride, bromide, and iodide ions with concentrated sulfuric acid. Include balanced chemical equations and explain the trend in reducing ability of the halide ions.
CAIE A Level Chemistry 9701 · Group 17
Group 17: compare question
How this question is marked
5 marks, so the mark scheme is looking for about 5 separate creditworthy points. Making the same point twice in different words earns it once.
Compare means: Give similarities or differences between two things, and say which side each point belongs to. Write each point as a pair, for example: A is X, whereas B is Y. Two separate descriptions rarely earn the marks.
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