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JEE Advanced levelOne or more correct optionsDifficulty 3 of 3co163

Each of the following reaction sequences is carried out to completion on the starting compound. In which are the final organic products (after acidification where needed) correctly named?

  1. Abenzaldehyde, Wolff-Kishner reduction, then hot alkaline , then acid: benzoic acid
  2. Bbutan-2-one, excess , then acid: propanoic acid
  3. Cphenyl methyl ketone, , then dilute acid: ethylbenzene
  4. D1-phenylpropan-1-one, /, then acid: benzoic acid

Answer: A, B

Benzaldehyde gives toluene, which hot oxidises to benzoic acid. Butan-2-one undergoes the haloform reaction to propanoic acid. gives only the alcohol, 1-phenylethan-1-ol. is not a methyl ketone and does not give the haloform reaction.
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