7th Class Science Wastewater Story Question Bank Wastewater Story

  • question_answer DIRECTIONS: Read the following two statements carefully and choose the correct options. (i) The inorganic impurities present in waste water are herbicides, pesticides, oil etc. (ii) The organic impurities are phosphates, metals, nitrates etc. (iii) There are no germs/bacteria present in waste water.

    A) Statements (i) and (iii) are incorrect but (ii) is correct.

    B) Statements (i) and (ii) are incorrect but (iii) is correct.

    C) All statements are correct.

    D) All statements are incorrect.

    Correct Answer: D

    Solution :

    It is vice-versa. Diseases causing germs/ bacteria are present.

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