Aromatic diazonium salts are more stable than aliphatic diazonium salts. The higher stability of aryl diazonium salts is due to resonance. Electron donating substituents increase electron density on benzene ring. Hereby they increase the stability of diazonium salts. Electron withdrawing substituents decrease electron density on benzene ring. Hereby they decrease the stability of diazonium salts. −COCH3 group is electron withdrawing and hence, diazonium salts from (D) is less stable than that from (B). Although-O- COCH3 is electron donating substituent, but it is present in meta position. Hence, it will not have significant effect on stability. The increasing order of diazotisation is (A) < (D) < (B) < (C).
JEE Main 2018 — Chemistry Organic Chemistry
2018mcqeasy
The increasing order of diazotisation of the following compounds is: (a) 
(b)
(c)
(d)
Official previous-year question
Held on 15 Apr 2018 · Verified 6 Jul 2026.
Options
- A
(D) < (C) < (B) < (A)
- B
(A) < (D) < (B) < (C)
- C
(A) < (B) < (C) < (D)
- D
(A) < (D) < (C) < (B)
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