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:
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 $0.5 \mathrm{ppm}$.
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