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JEE Main & Advanced JEE Main Solved Paper-2016

  • question_answer
    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 :- [JEE Main Solved Paper-2016 ]

    A) Iron                                       

    B) Fluoride

    C) Lead                     

    D) Nitrate

    Correct Answer: D

    Solution :

                    Parameters Maximum prescribed conc. in drinking water Iron                                        0.2 ppm Fluoride                               1.5 ppm Lead                                      50 ppb Nitrate                                  50 ppm Hence the concentration of nitrate in a given water sample exceeds from the upper limit as given above.


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