A) Electrophilic addition elimination reaction
B) Free radical addition elimination reaction
C) Electrophilic substitution elimination reaction
D) Nucleophilic addition elimination reaction
Correct Answer: D
Solution :
\[RCHO+\overset{..}{\mathop{N}}\,{{H}_{2}}N{{H}_{2}}\xrightarrow{{}}RCH=N-N{{H}_{2}}+{{H}_{2}}O\] In this reaction \[-\overset{..}{\mathop{N}}\,{{H}_{2}}\]acts as nucleophilic species which adds on carbon. Therefore this is the case of nucleophilic addition reaction. Simultaneously, a mole of\[{{H}_{2}}O\]also eliminated. Therefore, overall this reaction is a nucleophilic addition elimination reaction.
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