7th Class Science Wastewater Story Question Bank Wastewater Story

  • question_answer DIRECTIONS: Read the passage given below and answer the questions that follow. Passage - 2 Treatment of waste water involves physical, chemical and biological processes, which remove physical, chemical and biological matter that contaminates the waste water. Biogas is one of the products at WWTP. Biogas can be used

    A) as a fuel                      

    B) to produce electricity

    C) Both the above

    D) None of these

    Correct Answer: C

    Solution :

    Both the above


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