Question

Chlorination of alkanes is a/an reaction.

• A. addition
• B. elimination
• C. substitution

Answer 1

The correct option is C substitution

Chlorination of alkanes is a substitution reaction. In this reaction, the hydrogen atoms attached to carbon gets substituted by chlorine. Halogenation takes place either at high temperature or in the presence of diffused sunlight or ultraviolet rays. e.g. ${\mathrm{CH}}_4+{\mathrm{Cl}}_2\stackrel{\mathrm{h\nu }}{\to }$${\mathrm{CH}}_3\mathrm{Cl}+\mathrm{HCl}$
${\mathrm{CH}}_3\mathrm{Cl}+{\mathrm{Cl}}_2\stackrel{\mathrm{h\nu }}{\to }$${\mathrm{CH}}_2{\mathrm{Cl}}_2+\mathrm{HCl}$
${\mathrm{CH}}_2{\mathrm{Cl}}_2+{\mathrm{Cl}}_2\stackrel{\mathrm{h\nu }}{\to }$${\mathrm{CHCl}}_3+\mathrm{HCl}$
${\mathrm{CHCl}}_3+{\mathrm{Cl}}_2\stackrel{\mathrm{hv}}{\to }$${\mathrm{CCl}}_4+\mathrm{HCl}$