(i) Builders like sodium carbonate and trisodium phosphate are added to soap because builders make the soaps action more rapidly.
(ii) Soaps are biodegradable while detergents contains
branched hydrocarbons that are quiet stable, i.e. they do not degrade by the action of microorganism and therefore, causes water pollution in rivers.
(iii) Ethanol is added to soaps to make them