Question

Match the items of Column I with the items of Column II with reference to sewage.

Column I	Column II
(a) Inorganic impurities	(i) Phosphorus and nitrogen
(b) Organic impurities	(ii) nitrates and phosphates
(c) Nutrients	(iii) cholera and typhoid
(d) bacteria	(iv) pesticides and herbicides

Answer 1

(a) (ii);

(b) (iv);

(c) (i);

(d) (iii)