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O-LevelChemistryOrganic Chemistry5070/11 · Oct/Nov 2015 · Q351 Mark

A carbohydrate such as starch can be represented as shown. What is X?

This question uses a diagram from the original paper, which isn't shown here. Open the full paper from the past papers archive to see it.

Acarbon

Bhydrogen

Cnitrogen

Doxygen

✓ Correct answer

D: oxygen

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About this question

Topic: Organic Chemistry, O-Level Chemistry (syllabus 5070). Multiple choice, 1 mark.
Source: O-Level Chemistry, Oct/Nov 2015 Paper 1 Variant 1, question 35.

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