A water sample has ppm level concentration of the following metals : Fe = 0.2; Mn = 5.0; Cu = 3.0; Zn = 5.0. The metal that makes the water sample unsuitable drinking is
(1) Zn
(2) Fe
(3) Mn
(4) Cu
Correct option (3) Mn
Explanation:
(i) zn 5.0 ppm
(ii) Fe 0.2 ppm
(iii) Mn 5.0 ppm
(iv) Cu 3.0 ppm
