Explain the following terms with one suitable exmaple in each case. (3 marks)
(i) Cationic detergents (ii) Enzymes (iii) Antifertility drugs
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(i) Cationic detergents : They are quaternary ammonium salts of amines with acetates,
chlorides or bromides as anions and the cationic part possess a long hydrocarbon chain, and a
positive charge on nitrogen atom. Therefore they are called cationic detergents.
Example : Cetyltrimethyl ammonium bromide
(ii) Enzymes : The enzymes may be defined as bio-catalysts which catalyse the bio-chemical
reactions in the living organisms.
Example : Pepsin and Amylase.
(iii) Antifertility drugs : Chemical substances, which are used to check pregnancy in women, are
called antifertility drugs or birth control pills or oral contraceptives. These control the female
menstrual cycle and ovulation.
Example : Norethindrone, Ethinyl estradol, Mestranol.