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- The concentration of fluoride, lead, nitrate, and iron in a water sample from an underground lake was found to be 1 ppm, 40 ppm, 100 ppm and 0.2 ppm, respectively. This water is unsuitable for drinking due
The concentration of fluoride, lead, nitrate, and iron in a water sample from an underground lake was found to be 1 ppm, 40 ppm, 100 ppm and 0.2 ppm, respectively. This water is unsuitable for drinking due to high concentration of :
Option: 1 Fluoride
Option: 10 Lead
Option: 19 Nitrate
Option: 36 Iron
Answers (1)
As we learned in concept
Hard Water -
It contains calcium and Magnesium salt in the form of hydrogen carbonate , chloride and sulphate
- wherein
Hard water does not give Lathers with soap.
Maximum permissible concentration of constituents
lead : 50 ppm
nitrate : 50 ppm
Iron : 0.2 ppm
fluoride: 1 ppm
Therefore, option (3) is correct.
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