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  3. 7th Class
  4. Science
  5. Water: A Precious Resource

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

  • question_answer
    Germs and bacteria are destroyed by

    A) chlorination                

    B) Boiling

    C) Both (a) and (b)    

    D) filtration

    Correct Answer: C

    Solution :

    Both (a) and (b)          


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