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Solution


Q.

Salicylaldehyde is synthesized from phenol, when reacted with.                        [2024]
1  
2 CO2,NaOH  
3 CCl4,NaOH  
4 HCCl3,NaOH  

Ans.

(4)

1.  Formyl chloride (HCOCl) is unstable and does not exist, hence it cannot be used as a reagent.

2.  This is Kolbe's reaction.

3.  This is Reimer-Tiemann carboxylation reaction.

4.  This is Reimer-Tiemann formylation reaction.