Question

Match the following:

• A. A – V, B – III, C – II, D – I
• B. A – III, B – IV, C – I, D – II
• C. A – II, B – III, C – V, D – IV
• D. A – II, B – I, C – IV, D – III

Hint:

Reimer–Tiemann gives ortho-formylation of phenol; Kolbe gives ortho-carboxylation.

Answer 1

The Correct Option is D

Concept: Each named reaction corresponds to a characteristic transformation of aromatic compounds.

Step 1: Reimer–Tiemann reaction.
Phenol + CHCl$_3$/NaOH gives salicylaldehyde (o-hydroxybenzaldehyde).

Step 2: Etard reaction.
Toluene is oxidized using chromyl chloride to benzaldehyde.

Step 3: Kolbe reaction.
Sodium phenoxide reacts with CO$_2$ to give salicylic acid after acidification.

Step 4: Sandmeyer reaction.
Diazonium salts give aryl halides like chlorobenzene via CuCl. Conclusion:
A--II, B--I, C--IV, D--III.