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Question

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 for drinking is:

A
Fe
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B
Mn
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C
Zn
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D
Cu
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Solution

The correct option is B Mn
Metals Maximum Concentration
(in ppm)
ZnFeMnCuAlCd 5.00.20.053.00.20.005







  • These are the permissible concentration of few metals in drinking water.
  • In the given water sample, the concentration of Mn=5.0 that is greater than 0.05.
Hence, Mn makes the water sample unsuitable for drinking.
The correct answer is option (c)

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