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A-LevelChemistryHydrocarbons9701/12 · May/June 2016 · Q111 Mark

Which stage in the free radical substitution of ethane by chlorine has the lowest activation energy?

ACl₂ → 2Cl•
BCl• + C₂H₆ → C₂H₅• + HCl
CC₂H₅• + Cl₂ → C₂H₅Cl + Cl•
DCl• + C₂H₅• → C₂H₅Cl

✓ Correct answer

D: Cl• + C₂H₅• → C₂H₅Cl

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About this question

Topic
Hydrocarbons, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source
A-Level Chemistry, May/June 2016 Paper 1 Variant 2, question 11.

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