JEE Advanced · 2026 · 17 May 2026 · Paper 1 · Aldehydes Ketones and Carboxylic Acids

The major products obtained from the reactions in List-II are the reactants for the named reactions mentioned in List-I. Match each entry in List-I with the appropriate entry in List-II and choose the correct options.

List-I
(P) Stephen reaction
(Q) Sandmeyer reaction
(R) Hoffma …

The correct reaction/reaction sequence that would produce a dicarboxylic acid as the major product is

Reaction of iso-propylbenzene with ${\mathrm{O}}_2$ followed by the treatment with ${\mathrm{H}}_3{\mathrm{O}}^{+}$ forms phenol and a by-product P. Reaction of P with 3 equivalents of ${\mathrm{Cl}}_2$ gives compound Q. Treatment of Q with $\mathrm{Ca}(\mathrm{OH}{)}_2$ produces c …

Complete reaction of acetaldehyde with excess formaldehyde, upon heating with conc. NaOH solution, gives P and Q. Compound P does not give Tollens' test, whereas Q on acidification gives positive Tollens' test. Treatment of P with excess cyclohexanone in the presence of catalytic …

The option(s) with correct sequence of reagents for the conversion of $\mathbf{P}$ to $\mathbf{Q}$ is(are) :

The major products obtained from the reactions in List-II are the reactants for the named reactions mentioned in List-I. Match List-I with List-II and choose the correct option.

List-I
(P) Etard reaction
(Q) Gattermann reaction
(R) Gattermann-Koch reaction
(S) Rosenmund reductio …