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Question

Presence of which makes water unsuitable for drinking.


A

Fe = 0.2 ppm

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B

Cu = 2 ppm

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C

Mn = 0.5 ppm

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D

Zn = 0.05 ppm

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Solution

The correct option is C

Mn = 0.5 ppm


Explanation of correct answer:-

Option (C):

  • Presence of Manganese ions more than 0.5 ppm causes discoloration
  • It makes unpleasant taste in the water which makes it unsuitable for drinking purpose.
  • Plenty of Manganese causes toxicity in the body.
  • It reduces memory, motor skills causing nausea, constipation, etc.

Therefore, option (C) is the correct answer.


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