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JEE Advanced levelSingle correct optionDifficulty 3 of 3co007

Reactivity of the following towards (nucleophilic addition) increases in the order

  1. A4-methoxybenzaldehyde < benzophenone < 4-nitrobenzaldehyde < benzaldehyde
  2. Bbenzophenone < 4-methoxybenzaldehyde < benzaldehyde < 4-nitrobenzaldehyde
  3. Cbenzophenone < 4-nitrobenzaldehyde < benzaldehyde < 4-methoxybenzaldehyde
  4. D4-nitrobenzaldehyde < benzaldehyde < 4-methoxybenzaldehyde < benzophenone

Answer: B

Benzophenone is a hindered diaryl ketone and is least reactive. Among aldehydes, a donating lowers electrophilicity by resonance and a withdrawing raises it, so the order is as written.
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