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JEE Main · 2024 · 06 Apr 2024 · Shift 1 · Aldehydes Ketones and Carboxylic Acids

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Which among the following aldehydes is most reactive towards nucleophilic addition reactions?
  1. (A)(see structure)
    ✓ Correct
  2. (B)(see structure)
  3. (C)(see structure)
  4. (D)(see structure)

Answer: (A)

Solution

Reactivity toward nucleophilic addition increases with less steric hindrance and greater positive charge on the carbonyl carbon. Formaldehyde (HCHO) has the least steric hindrance and no electron-donating alkyl group, so it is the most reactive.

JEE Main · 2024 · 06 Apr 2024 · Shift 1 · Single correct option

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