7th Class Science Wastewater Story Question Bank Wastewater Story

  • question_answer 33) Which of the following can be used to disinfect water?

    A) Bleaching Powder       

    B) Chlorine tablets

    C) Both (a) and (b)          

    D) None of these

    Correct Answer: C

    Solution :

    Both (a) and (b)

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