Question

Acetaldehyde reacts with hydroxyl amine to form _____
A.Formonitrile
B.Acetone cyanohydrin
C.Acetaldoxime
D.Acetoxime

Answer 1

Hint: We have to know that when acetaldehyde reacts with hydroxyl amine it undergoes nucleophilic substitution reaction. In a nucleophilic substitution reaction, the electron rich compound replaces the leaving group. In acetaldehyde, the functional group found is aldehyde. Hydroxylamine is found in crystalline form.

Complete answer:
We know that electrophiles are species which are deficient in electrons, so they have tendency to gain electrons but nucleophiles are species that are rich in electrons, so they have the ability to donate electrons.
We have to know that the reaction between acetaldehyde with hydroxylamine is a nucleophilic substitution reaction. In this nucleophilic substitution reaction, acetaldehyde and hydroxyl amine react to form Acetaldoxime. We can write the chemical reaction as,

In this reaction, the nucleophilicity found in nitrogen of the hydroxylamine is raised because of the presence of oxygen. Because of the transfer of protons, elimination of water occurs. Mixture of geometric isomers is formed by oxides.
We can draw the skeletal structure of Acetaldoxime is,

When acetaldehyde reacts with hydroxyl amine by nucleophilic substitution reaction, the product formed is Acetaldoxime. So, we can say that Option (C) is correct.

Note:
We have to know that the reaction between acetaldehyde with hydroxylamine is
condensation reaction. In this reaction, a molecule of acetaldehyde is condensed with hydroxylamine to form Acetaldoxime. As this reaction is a condensation reaction, a molecule of water is eliminated. Hydroxylamine is helpful in the formation of oxides. We have to remember that a compound that contains oxime is Acetaldoxime.