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Question

The concentration of fluoride, lead nitrate and iron in water sample from an underground lake was found to be 1000ppb, 100 ppm and 0.2 ppm, respectively. This water is unsuitable for drinking due to high concentration of :


  1. Iron

  2. Fluoride

  3. Lead

  4. Nitrate


Solution

The correct option is D

Nitrate


The maximum limit of nitrate in drinking water is 50 ppm.

Excess nitrate in drinking water can cause blue baby syndrome.

The prescribed limit for fluoride is 10 ppm.

The prescribed limit for lead is 50 ppb.

The prescribed limit for iron is 0.2 ppm

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