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SAI International School
                                               Subject - Chemistry
                                                     Class - VIII
                                       Topic –Pollution of air and water
                    Sub Topic-Introduction, Air pollution, Causes of air pollution



                                               HOME ASSIGNMENT




               OBJECTIVE/MCQS

        Choose the correct option

            1.   Which of these causes air pollution?
                    a.  Smoke released from vehicles.
                    b.  LPG used at home.
                    c.  CNG used in vehicles.
                    d.  Solar energy.
            2.   Which of these does not contain Chlorofluorocarbons?
                    a.  Laptops.
                    b.  Refrigerators.
                    c.  Air conditioners.
                    d.  Perfumes.
            3.   Which of these is the natural cause of air pollution?
                    a.  Smokes from cigarettes.
                    b.  Particles from perfumes.
                    c.  Volcanic eruption.
                    d.  Smokes from factories.
            4.   Which of this component of air is not included in the air in normal conditions?
                    a.  Carbon dioxide.
                    b.  Carbon monoxide.
                    c.  Nitrogen.
                    d.  Oxygen.





















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