$\mathrm{CHCl}_3$ - used in production of freon - 12.

$\mathrm{CCl}_4$ - used in production of freon - 22.

$\mathrm{CH}_2 \mathrm{Cl}_2$ - used as propellant in aerosols.

DDT - first chlorinated organic herbicide.

$\mathrm{HCl}+\mathrm{ZnCl}_2$

$\mathrm{PCl}_5$

$\mathrm{SOCl}_2$

$\mathrm{PCl}_3$

A-III, B-IV, C-II, D-I

A-III, B-IV, C-I, D-II

A-II, B-III, C-I, D-IV

A-I, B-II, C-IV, D-III