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

  • question_answer
    Which of the following, if used regularly can kill germs in overhead storage tanks in our houses?

    A)  Sand

    B)  Chlorine tablets

    C)  Chewable tablets

    D)  Chalk powder

    Correct Answer: B

    Solution :

    Chlorine gas is passed into water to kill germs and purify drinking water. As this is not possible, we can clean the water tanks regularly with bleaching powder or use chlorine tablets regularly to kill germs.


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