Which of the following conditions in drinking water causes methemoglobinemia?
>50ppm of load
>100ppm of sulphate
>50ppm of nitrate
>50ppm of chloride
A
>50ppm of nitrate
B
>50ppm of load
C
>100ppm of sulphate
D
>50ppm of chloride
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Solution
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The concentration of nitrate >50ppm in drinking water causes methemoglobinemia which is a blood disorder in which an abnormal amount of methemoglobin is produced.
Hence, option D is correct.
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