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SAI INTERNATIONAL SCHOOL
                                                        STD-VII

                                            SUBJECT - CHEMISTRY
                                TOPIC-MANAGEMENT OF WASTE WATER
                   SUB TOPIC-ALTERNATIVE METHOD OF SEWAGE DISPERSAL

                                                  HOME ASSIGNMENT



               OBJECTIVE
                MCQS



                 SL.                              Questions                                Mark        Skill
                 No.
                 Q.1  Which of the following is not a step involved in alternative  1                  U
                       method of sewage disposal?

                              a)   Septic tank
                              b)  Chemical treatment
                              c)  Incineration
                              d)  Landfill

                 Q.2                                                                       01          U
                       The method using red worms to transform waste into
                       manure is

                           a)  Composting
                           b)  Vermicomposting
                           c)  Landfill

                       Septic tank

                 Q.3  The name of the bacteria which break down waste in                   3           U
                       absence of oxygen is called

                           a)  Aerobic bacteria.
                           b)  Anaerobic bacteria
                           c)  Rod shaped bacteria

                       Spherical bacteria
                 Q.4  ………… is a method in which solid organic wastes are burnt             2+2+1       U&A
                       to form gracious product.
                              a)  Septic tank
                              b)  Incineration
                              c)  Landfill
                              d)   Vermicomposting







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