Give the uses of Freon-$12$,$DDT$,carbon tetrachloride,and iodoform.

(N/A) Uses of Freon-$12$:
Freon-$12$ (dichlorodifluoromethane,$CF_2Cl_2$) is commonly known as $CFC$. It is used as a refrigerant in refrigerators and air conditioners. It is also used in aerosol spray propellants such as body sprays and hair sprays. However,it damages the ozone layer,so its manufacture was banned in many countries in $1994$.
Uses of $DDT$:
$DDT$ ($p,p'$-dichlorodiphenyltrichloroethane) is a well-known insecticide. It is very effective against mosquitoes and lice. Due to its harmful environmental effects,it was banned in the United States in $1973$.
Uses of carbon tetrachloride $(CCl_4)$:
$(i)$ It is used for manufacturing refrigerants and propellants for aerosol cans.
$(ii)$ It is used as feedstock in the synthesis of chlorofluorocarbons and other chemicals.
$(iii)$ It is used as a solvent in the manufacture of pharmaceutical products.
$(iv)$ Until the mid-$1960$s,it was widely used as a cleaning fluid,a degreasing agent in industries,and a fire extinguisher.
Uses of iodoform $(CHI_3)$:
Iodoform was used earlier as an antiseptic. It has now been replaced by other iodine-containing formulations due to its objectionable smell. Its antiseptic property is due to the liberation of free iodine when it comes in contact with the skin.