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ChemistryJEE Main 2 Apr 2026, Shift 1·Q18·MCQ·Moderate

Amines · Azo coupling steric inhibition of resonance

Consider the three aromatic molecules (P, Q and R) whose structures have been given below :
The correct order regarding the reactivity of these compounds with Ph−N(+)≡N  Cl(−)\mathrm{Ph{-}\underset{{\scriptstyle(+)}}{N}{\equiv}N\;Cl^{(-)}} under optimum but slightly acidic medium is :
  1. (1)P >> Q >> R
  2. (2)R >> P >> Q
  3. (3)R >> Q >> P
  4. (4)P >> R >> Q

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See the full 2 Apr 2026, Shift 1 paper