A-LevelChemistryHydrocarbons9701/12 · Oct/Nov 2009 · Q251 Mark

Which equation represents a valid propagation step in the free radical reaction between ethane and chlorine?

AC2H6 + Cl• → C2H5Cl + H•

BC2H5Cl + Cl• → C2H4Cl• + HCl

CC2H6 + H• → C2H5• + HCl

DC2H5• + Cl2 → C2H5Cl + Cl•

✓ Correct answer

B: C2H5Cl + Cl• → C2H4Cl• + HCl

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Topic: Hydrocarbons, A-Level Chemistry (syllabus 9701). Multiple choice, 1 mark.
Source: A-Level Chemistry, Oct/Nov 2009 Paper 1 Variant 2, question 25.

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