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Which of the following cannot be converted to benzoic acid on reaction with KMnO4-KOH followed by H3O+?
  • a)
    Ethyl benzene
  • b)
    Acetophenone
  • c)
    4-Methylacetophenone
  • d)
    Styrene
Correct answer is option 'C'. Can you explain this answer?
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Most Upvoted Answer
Which of the following cannot be converted to benzoic acid on reaction...
The ethyl group, acetyl group and ethene group are all oxidised to potassium carboxylate groups which are further oxidised to carboxyl groups. In the case of 4-Methylacetophenone, there are two groups that will be oxidised to carboxyl groups, hence forming terephthalic acid instead of benzoic acid.
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Community Answer
Which of the following cannot be converted to benzoic acid on reaction...
Explanation:
When a compound is treated with KMnO4-KOH followed by H3O, it undergoes oxidative cleavage.

- Ethyl benzene: Ethyl benzene can be converted to benzoic acid on reaction with KMnO4-KOH followed by H3O. The benzene ring is oxidized to a carboxylic acid group.
- Acetophenone: Acetophenone can be converted to benzoic acid on reaction with KMnO4-KOH followed by H3O. The benzene ring is oxidized to a carboxylic acid group.
- 4-Methylacetophenone: 4-Methylacetophenone can be converted to benzoic acid on reaction with KMnO4-KOH followed by H3O. The benzene ring is oxidized to a carboxylic acid group.
- Styrene: Styrene cannot be converted to benzoic acid on reaction with KMnO4-KOH followed by H3O. Styrene contains a double bond between the carbons of the benzene ring and the vinyl group. KMnO4-KOH followed by H3O will oxidize the double bond to a carboxylic acid group, but it will not oxidize the benzene ring.

Therefore, the compound that cannot be converted to benzoic acid on reaction with KMnO4-KOH followed by H3O is 4-Methylacetophenone.
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Which of the following cannot be converted to benzoic acid on reaction with KMnO4-KOH followed by H3O+?a)Ethyl benzeneb)Acetophenonec)4-Methylacetophenoned)StyreneCorrect answer is option 'C'. Can you explain this answer?
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