Question

Acetaldoxime formed from acetaldehyde is a _______ reaction.
A.nucleophilic substitution
B.nucleophilic addition
C.electrophilic substitution
D.electrophilic addition

Answer 1

In this question, acetaldehyde is reacted with hydroxyl amine to produce acetaldoxime as a product. electrophiles are electron deficient and therefore accept electrons whereas nucleophiles are electron rich and have a tendency to donate electrons.

Complete step by step answer:
When an acetaldehyde reacts with hydroxyl amine it gives acetaldoxime as a product.
The reaction can be written as follows:

Here, the nucleophilic of the nitrogen on the hydroxylamine is increased due to the presence of oxygen. Elimination of water takes place due to proton transfer. Oximes form a mixture of geometric isomers.
Nucleophilic substitution is taking place in this reaction;
therefore, the correct option is (A) nucleophilic substitution.

Additional information:
-Nucleophilic substitution reaction is defined as the reaction in which a leaving group is replaced by an electron rich compound.
-Nucleophilic addition reaction is defined as the reaction in which double bonds and triple bonds break due to their reaction with nucleophiles.
-Electrophilic substitution reaction is defined as the reaction in which electrophile replaces a functional group.
-Electrophilic addition reaction is the reaction in which one pi bond is broken and two sigma bonds are formed.
-Acetaldehyde is defined as an organic compound that contains aldehyde as a functional group.
-Hydroxylamine is defined as an inorganic compound obtained in a crystalline form. Hydroxyl amine is used to prepare oximes. It is hygroscopic in nature.
-Acetaldoxime is a chemical compound. It is an oxime containing compound.

Note: In this reaction, water is eliminated to form oximes.
-Nucleophilic substitution reaction takes place where water is removed.