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SAI International School
                                               Subject - Chemistry
                                                     Class - VIII
                                      Topic – Pollution of Air and water
                                       Sub-topic-Effects of air pollution


                                               HOME ASSIGNMENT

               OBJECTIVE/MCQS:-


            1.   Which of the following statement about the ozone layer is correct?
                    a.  It is essential for breathing.
                    b.  It absorbs ultraviolet rays.
                    c.  Its proportion in the air is about 3 %.
                    d.  It is responsible for acid rain.
            2.   CFCs are not present in
                    a.  Packaged food.
                    b.  Refrigerator.
                    c.  Air conditioners.
                    d.  Perfumes.
            3.   Corrosion of Taj Mahal is also known as
                    a.  Rusting of marble.
                    b.  Marble cancer.
                    c.  Marble carbonification.
                    d.  Marble carbonisation.
            4.   Which of these is a poisonous gas to inhale?
                    a.  Carbon dioxide.
                    b.  Carbon monoxide.
                    c.  Nitrogen.
                    d.  Oxygen.
            5.   Dust particles in the air,
                    a.  Helps plants for photosynthesis.
                    b.  Prevents plants for photosynthesis.
                    c.  Provides more carbon dioxide to plants.
                    d.  Provides oxygen to plants.

               SUBJECTIVE

          1.    Name the air pollutant that combine with the haemoglobin of our blood?            U       1

          2.    Name one constituent of polluted air which contributes in producing acid          U       1
                rain.
















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