A-LevelChemistryReaction kineticsOct/Nov 2013Paper 1 Q71 Mark
Which stage in the free radical substitution of methane by chlorine will have the lowest activation energy?
ACH3• + Cl2 → CH3Cl + Cl•
BCl• + Cl• → Cl2
CCl• + CH4 → CH3• + HCl
DCl2 → Cl• + Cl•
✓ Correct Answer
The correct answer is B. This question tests the candidate's understanding of reaction kinetics 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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