Maximum prescribed limit of Zn in drinking water is:
A
1 ppm
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B
10 ppm
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C
4 ppm
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D
5 ppm
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Solution
The correct option is D 5 ppm
⇒ Zinc is one of the important trace elements that play a vital role in the physiological and metabolic process of many organisms. Nevertheless, higher concentrations of zinc can be toxic to the organism.
⇒ It plays an important role in protein synthesis and is a metal which shows fairly low concentration in surface water due to its restricted mobility from the place of rock weathering or from the natural sources.
⇒ According to the standards maximum prescribed limit of Zn in drinking water is 5ppm