Environmental Chemistry - Result Question 21

21. The condition for methemoglobinemia by drinking water is

(2019 Main, 9 Jan II)

(a) $>50$ ppm nitrate

(b) $>50$ ppm chloride

(c) $>50$ ppm lead

(d) $>100$ ppm sulphate

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Answer:

Correct Answer: 21. (a)

Solution:

  1. According to EEC (European Environment Commission), excess of $NO _3^{-}$( $>50 ppm$ ) in drinking water may lead to methemoglobinemia (‘Blue baby syndrome’). It also may cause stomach-cancer.