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5th Class Science Our Environment Question Bank Self Test-9

  • question_answer
    Presence of undesirable substances in water is known as:

    A) (a) Water cycle

    B) (b) Water pollution

    C) (c) Water vapour

    D) (d) All of these

    E) (e) None of these

    Correct Answer: B

    Solution :

    (b)


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