UPSC General Studies Sample Paper General Studies Sample Paper-5

  • question_answer
    Consider the following statements regarding nitrate.
    1. Excess nitrate in drinking water can cause a disease called Methemoglobinemia.
    2. The maximum concentration of nitrate in drinking water as per WHO norms is 45 ppm.
    Which of the statement(s) given above is/are correct?

    A)  Only 1             

    B)  Only 2            

    C)  Both 1 and 2                

    D)  Neither1nor 2

    Correct Answer: C

    Solution :

    [c] Nitrate oxidise the iron atoms in haemoglobin rendering it unable to carry oxygen, this can lead to generalised lack of oxygen in organ tissue and a dangerous condition called Methemoglobinemia (which is called blue baby syndrome in instants). WHO prescribes nitrate content not more than 45 ppm. So, both the statements are correct and option [c] is the answer.

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