Question -
Answer -
(i) n-butyl chloride is treated with alcoholic KOH,
(ii) bromobenzene is treated with Mg in the presence ofdry ether,
(iii) chlorobenzene is subjected to hydrolysis,
(iv) ethyl chloride is treated with aqueous KOH,
(v) methyl bromide is treated with sodium in thepresence of dry ether,
(vi) methyl chloride is treated with KCN.
Answer
(i) When n−butyl chloride is treated with alcoholic KOH,the formation of but−l−ene takes place. This reaction is a dehydrohalogenationreaction.
(ii) When bromobenzene is treated with Mg in the presenceof dry ether, phenylmagnesium bromide is formed.
(iii) Chlorobenzene does not undergo hydrolysis undernormal conditions. However, it undergoes hydrolysis when heated in an aqueoussodium hydroxide solution at a temperature of 623 K and a pressure of 300 atmto form phenol.
(iv) When ethyl chloride is treated with aqueous KOH, itundergoes hydrolysis to form ethanol.
(v) When methyl bromide is treated with sodium in thepresence of dry ether, ethane is formed. This reaction is known as the Wurtzreaction.
(vi) When methyl chloride is treated with KCN, it undergoes asubstitution reaction to give methyl cyanide.
