A-LevelChemistryHydrocarbonsFeb/Mar 2024Paper 1 Q271 Mark
But-2-ene reacts with cold dilute acidified KMnO₄ to give product X. But-2-ene reacts with hot concentrated acidified KMnO₄ to give product Y. Which statement about product X and product Y is correct?
ABoth product X and product Y will react with 2,4-dinitrophenylhydrazine.
BNeither product X nor product Y will react with 2,4-dinitrophenylhydrazine.
CProduct X will react with 2,4-dinitrophenylhydrazine, product Y will not.
DProduct Y will react with 2,4-dinitrophenylhydrazine, product X will not.
✓ 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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