# A water sample has ppm level concentration of the following metals:

Question:

A water sample has ppm level concentration of the following metals: $\mathrm{Fe}=0.2 ; \mathrm{Mn}=5.0 ; \mathrm{Cu}=3.0 ; \mathrm{Zn}=5.0$. The metal that makes the water sample unsuitable for drinking is:

1. Cu

2. Mn

3. Fe

4. Zn

Correct Option:

Solution:

The water sample containing $\mathrm{Mn}=5 \mathrm{ppm}$ is unsuitable for drinking as the prescribed level for Mn in drinking water is $0.5 \mathrm{ppm}$.