Define the following:

(a) Cationic detergents

(b) Broad spectrum antibiotics

(c) Tranquilizers

(a) Cationic detergents are quaternary ammonium salts [chlorides, bromides, acetates, etc.] having long chain alkyl groups. The cationic detergents are more expensive than anionic detergents and hence they find only limited use. However, they possess germicidal properties and are used quite extensively as germicides.

(b) The class of antibiotics which is effective against wide range of disease causing bacteria including the gram positive and gram negative bacteria is termed as Broad Spectrum antibiotics. Example: Amoxicillin, Streptomycin.

(c) Sleeping pills belong to tranquilizers class of drugs. Sleeping pills induce artificial sleep in people suffering from insomnia by depressing the activities of central nervous system [brain and spinal cord].