Q.

What is the permitted concentration of arsenic in drinking water?

A. 10 g/l
B. 20 g/l
C. 30 g/l
D. 40 g/l
Answer» A. 10 g/l
Explanation: the permitted concentration of arsenic in drinking water is 10g/l. the permitted concentration of iron in drinking water is 200g/l. the permitted concentration of manganese in drinking water is 50g/l.
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