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JEE Main & Advanced JEE Main Paper (Held On 09-Jan-2019 Morning)

  • question_answer
    A water sample has ppm level \[Fe=0.2\]; \[Mn=5.0\] ; \[Cu=3.0\] ; \[Zn=5.0\] The metal that makes the water sample unsuitable for drinking is: [JEE Main Online Paper (Held On 09-Jan-2019 Morning]

    A) Zn             

    B) Fe                 

    C) Cu             

    D) Mn

    Correct Answer: D

    Solution :

    Permissible values \[Zn\text{ }=\text{ }5\text{ }ppm\] \[Fe=0.2\text{ }ppm\] \[Cu\text{ }=\text{ }3.0\text{ }ppm\]


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