A-LevelChemistryHydrocarbonsMay/June 2021Paper 1 Q231 Mark
Methane and bromine react by free radical substitution. P and Q are involved in the reaction mechanism. • are both involved in propagation steps as reactants • are both involved in termination steps as reactants. What could be P and Q?
ABr and H
BBr and CH₃
CBr and C₂H₆
DCH₃ and CH₃Br
✓ Correct Answer
The correct answer is B. This question tests the candidate's understanding of hydrocarbons within the Chemistrysyllabus. The examiner's mark scheme requires...
📋 Examiner Report & Trap Analysis
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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