Previous Year NEET Question- Alcohols L-7

Question: Consider the reaction :#

$$ \mathrm{RCHO}+\mathrm{NH}_2 \mathrm{NH}_2 \rightarrow \mathrm{RCH}=\mathrm{N}-\mathrm{NH}_2 $$

What sort of reaction is it?

A) Electrophilic addition-elimination reaction

B) Free radical addition-elimination reaction

C) Electrophilic substitution-elimination reaction

D) Nucleophile addition-elimination reaction

Answer: Nucleophile addition-elimination reaction#

Solution:#

$$ \mathrm{RCHO}+\mathrm{NH}_2 \mathrm{NH}_2 \rightarrow \mathrm{RCH}=\mathrm{N}-\mathrm{NH}_2 $$

Such reactions take place in slightly acidic medium and involve nucleophilic addition of the ammonia derivative.