A Levels Chemistry (9701)•9701/12/O/N/19

Explanation
Oxidative cleavage by hot, concentrated acidified KMnO4 yields one product from symmetrical alkenes
Steps:
- Identify the reaction: Hot, concentrated acidified KMnO4 cleaves C=C bonds in alkenes to carbonyl compounds (ketones or CO2/COOH).
- Determine product condition: A single carbon-containing product implies complete oxidation to CO2 or HCOOH from a symmetrical structure with equivalent carbons.
- Evaluate options: All choices are CH3CH2CH3 (propane, an alkane), which resists oxidation under these conditions, yielding no defined products.
- Conclude ambiguity: Identical options provide no distinction, making selection impossible.
Why B is correct:
- Not enough information; all options identical, but specified as B without differentiation.
Why the others are wrong:
- A: Identical to B, alkane not cleaved to single product.
- C: Identical to B, alkane not cleaved to single product.
- D: Identical to B, alkane not cleaved to single product.
Final answer: Not enough information.
Topic: Hydrocarbons
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