Our Environment Chapter 13 Class 10 Science PYQs


Practice PYQ of Our Environment Chapter 13 Class 10 Science with handpicked important questions from previous years question paper with solutions.


    Q1:

    We do not clean ponds or lakes but an aquarium needs to be cleaned regularly. Why ?

    CBSE [2023]

    Easy

    Q2:

    (a) Name the group of organisms which form in the first trophic level of all food chains. Why are they called so ? (b) Why are the human beings most adversely affected by bio-magnification ? (c) State one ill-effect of the absence of decomposers from a natural ecosystem.

    CBSE [2022]

    Medium

    Q3:

    Human beings are most adversely affected by the Biological Magnification. State the reason. Why can ordinary washing of the edibles (fruits and vegetables) not reduce the effect of biological magnification ?

    CBSE [2022]

    Easy

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