The first reaction involves the conversion of chloroethane (CH\(_3\)CH\(_2\)Cl) to a nitrile (A) using potassium cyanide (KCN). The nitrile (A) is then reduced to an amine (B) using lithium aluminium hydride (LiAlH\(_4\)). Finally, the amine (B) undergoes diazotization with nitrous acid (HNO\(_2\)) to form an alcohol (C).
The reactions are as follows:
1. A: \(\text{CH}_3\text{CH}_2\text{CN}\) (Ethyl Cyanide)
2. B: \(\text{CH}_3\text{CH}_2\text{NH}_2\) (Ethylamine)
3. C: \(\text{CH}_3\text{CH}_2\text{OH}\) (Ethanol)