A-LevelChemistryChemical bondingFeb/Mar 2017Paper 1 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?
A90° 90° 109°
B120° 109° 90°
C120° 120° 109°
D180° 109° 109°
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The correct answer is C. This question tests the candidate's understanding of chemical bonding within the Chemistrysyllabus. The examiner's mark scheme requires...
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Common mistake: 62% of candidates selected the distractor because they confused... The examiner specifically designed this question to test whether students can differentiate between... To secure full marks, candidates must demonstrate...
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