1.

Define the following: (a) Anionic detergents (b) Limited spectrum antibiotics (c) Antiseptics

Answer»

Solution :(a) Anionic detergents: These are so CALLED because a large part of their molecules are anions.
these are of two types:
(a) Sodium alkyl sulphates: for example, sodium lauryl sulphate `C_(17)H_(23)CH_(2)OSO_(3)Na`
(b) Sodium alkyl benzene sulphonates:

(b) Limited spectrum antiobiotics: Antibiotics which are are specific for certain desease only. Ex: pencillin. Streptomycin for tuberculosis etc.
(c) Antiseptics: They are the chemical SUBSTANCES which prevent the growth of micro-organism and may even kill them. they are safe to be APPLIED to living tissues.
For example, Dettol, Savlon, Iodine, Boric aciid etc.


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