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  5. Water: A Precious Resource

7th Class Science Water: A Precious Resource Question Bank Water : A Precious Resource

  • question_answer
    Which of the following are removed by use of skimmer in WWTP?

    A) Oils                             

    B) Greases

    C) Both of these    

    D) None of these

    Correct Answer: C

    Solution :

    Both of these   


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