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The concentration of fluoride, lead, nit...

The concentration of fluoride, lead, nitrate and iron in a water sample from an underground lake was found to be 1000 ppb, 40 ppb, 100 ppm and 0.2 ppm respectively. This water is unsuitable for drinking due to high concentration of

A

fluoride

B

lead

C

nitrate

D

iron

Text Solution

Verified by Experts

The correct Answer is:
C
In drinking water, maximum permissible concentration (tolerable limits) of different chemicals are fluoride (1 ppm), lead (50 ppb), nitrate (50 ppm) and iron (0.2 ppm). As the given sample of water contain higher concentration of nitrate ions (100 ppm) than the permissible limit of 50 ppm, therefore, given sample of water is unsuitable for drinking.
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