A-LevelChemistryChemical bonding9701/12 · Feb/Mar 2017 · Q51 Mark

The characteristic smell of garlic is due to alliin. [Figure showing the structure of alliin with bond angles x, y and z marked]. What are the approximate bond angles x, y and z in a molecule of alliin?

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A90° 90° 109°

B120° 109° 90°

C120° 120° 109°

D180° 109° 109°

✓ Correct answer

C: 120° 120° 109°

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Topic: Chemical bonding, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, Feb/Mar 2017 Paper 1 Variant 2, question 5.

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