Chemistry Class 12 NCERT Solutions: Chapter 10 Haloalkanes and Haloarenes Part 13

Download PDF of This Page (Size: 244K)

Q: 22. What happens when

(i) n-butyl chloride is treated with alcoholic ,

(ii) Bromobenzene is treated with in the presence of dry ether,

(iii) chlorobenzene is subjected to hydrolysis,

(iv) ethyl chloride is treated with aqueous

(v) methyl bromide is treated with sodium in the presence of dry ether,

(vi) methyl chloride is treated with

Answer:

(i) When n−butyl chloride is treated with alcoholic , the formation of but ene takes place. This reaction is a dehydrohalogenation reaction.

(ii) When bromobenzene is treated with Mg in the presence of dry ether, phenylmagnesium bromide is formed.

Q 22 ii Bromobenzene is treated with Mg in the presence of dry ether

Q 22 Ii Bromobenzene Treated With Mg in Presence of Dry Ether

Q 22 ii Bromobenzene is treated with Mg in the presence of dry ether

(iii) Chlorobenzene does not undergo hydrolysis under normal conditions. However, it undergoes hydrolysis when heated in an aqueous sodium hydroxide solution at a temperature of and a pressure of atm to form phenol.

Q 22 Chlorobenzene is Subjected to Hydrolysis,

Q 22 Chlorobenzene Is Subjected to Hydrolysis,

Q 22 Chlorobenzene is Subjected to Hydrolysis,

(iv) When ethyl chloride is treated with aqueous , it undergoes hydrolysis to form ethanol.

(v) When methyl bromide is treated with sodium in the presence of dry ether, ethane is formed. This reaction is known as the Wurtz reaction.

(vi) When methyl chloride is treated with , it undergoes a substitution reaction to give methyl cyanide.