Fundamentholfundamenthol
JEE Main2019Chemistry
Q.

Water samples with BOD values of 4 ppm and 18 ppm, respectively, are

  1. A

    Clean and Highly polluted 

  2. B

    Clean and Clean 

  3. C

    Highly polluted and Clean

  4. D

    Highly polluted and Highly polluted 

Solution

Clean water have BOD value of less than 5 ppm whereas highly polluted water could have BOD value of 17 ppm or more.

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