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SAI International School


                                                     Class – VIII
                                               Subject – Chemistry


                               Topic – SYNTHETIC FIBRES AND PLASTICS
                                   Sub-Topic – Plastics and Environment


                                               HOME ASSIGNMENT

        Objective:


           i.   Which one of the following not correct about plastics?
               a. Plastics can be moulded into different shapes.

               b. Plastics are good conductor of heat and electricity.
               c. Plastics are chemically unreactive.

               d. Plastics are light, strong and durable.

          ii.   Which one of the following is a fire-resistant plastic?
               a. Polythene          b. PVC                c. Melamine          d. Bakelite
          iii.   Whichof the given materials is used to prepare synthetic fibres like polyester and acrylic?
               a. Petrochemicals            b. Coconut fibres
               c. Cellulose                 d. Paper pulp

         iv.   Pick the wrong option:
               a. Plastics                  b. Aluminium cans

               c. Wood                      d. Iron
          v.   Which one of the following do you think is better for storing chemicals?
               a. Copper jars               b. Glass containers

               c. Metal jars                d. Plastics



        Subjective:


        Q. No.                                       Questions                                          Marks
           1.     The  use of  plastics  can  be  reduced by  using  bags  made  of  _________  or         1
                  _________ instead of polythene bags.
           2.     Like synthetic fibres, plastic is also a __________.                                     1
           3.     Why is it not advisable to burn plastic and synthetic fibres?                            1
           4.     Should  the  handle  and  bristles  of  a  tooth  brush  be  made  of  the  same         3
                  material? Explain your answer.
           5.     Categorise the materials of the following products into ‘can be recycled’ and            3
                  ‘cannot be recycled’:                                                               (1.5+1.5)
                  Telephone instruments, plastic toys, cooker handles, ball point pens, plastic
                  bowls and electrical switches.




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