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5th Class Science Pollution and Calamities Question Bank Pollution and Calamities

  • question_answer
    Scientists were studying two types of hospital waste, X and Y for their disposal and their effect on environment. They plotted a graph showing change in their quantities over time, when dumped in an open field. Refer to the given graph and select the option that correctly identifies X and Y.          

    A)
    X Y
    Syringes Cotton swabs
                   

    B)
    X Y
    Cotton bolls Broken scalpels

    C)
    X Y
    Broken scalpels Syringes
                   

    D)
    X Y
    Band-aids Medicines

    Correct Answer: B

    Solution :

              According to the given graph, X is a biodegradable material because its quantity decreases overtime, while Y is a non-biodegradable material as its quantity remains almost the same over time.


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