83. The acidity of p-chlorobenzoic acid is less than p-nitrobenzoic acid but more than benzoic acid. This is because:

  • Chlorine is more electronegative than nitrogen.
  • Nitro group has a stronger electron-withdrawing resonance effect than chlorine.
  • Chlorine is an electron-donating group.
  • Nitro group destabilizes the carboxylate ion.
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