Question

Phenol $+ CCl_4 + KOH \longrightarrow X$ ;
Which of the following statement is true for $X$ ?

• A. It gives effervescence with $NaHCO_3$
• B. Gives silver mirror with Tollen’s reagent
• C. Does not give the red colour with $FeCl_3$
• D. All of the above

Answer 1

Answer: (A)

The given reaction is Reimer-Tiemann reaction.





(a) Salicylic acid gives effervescence with $NaHCO _{3}$, which is a characteristic feature of carboxylic acid. Thus, it ensures the presence of a carboxylic group in it.

(b) It doesn't give silver mirror with Tollen's reagent because it doesn't have aldehydic group.

(c) It gives red colour with neutral $FeCl _{3}$ as it contains enol group i.e., group i.e., $=\underset{|}{C}-OH$ group