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SAI International School


                                                     Class – VIII
                                               Subject – Chemistry


                               Topic – SYNTHETIC FIBRES AND PLASTICS
                                      Sub-Topic – Polyester and Acrylic




                                               HOME ASSIGNMENT

        Objective:

           i.   Rayon is different from synthetic fibres because?

               a. It has a silk-like appearance
               b. It is obtained from a natural polymer.

               c. Its fibres can also be woven like those of natural fibres.
               d. It can be moulded.

          ii.   Which of the following is a source of Rayon?
               a. Wool               b. PET                       c. Wood Pulp         d. Silk

          iii.   Which of the following groups contain all synthetic fibres?
               a. Nylon, Terylene, Wool            b. Cotton, Polycot, Rayon
               c. Acrylic, Silk, Wool              d. PVC, Polythene, Bakelite

         iv.   The synthetic fibre which can be used as a substitute for wool for making sweaters and
               shawls is:
               a. Acrylic            b. Nylon

               c. Polyester          d. Terylene

          v.   Which one of the following is not made of PET?
               a. Car wipers         b. Engine covers             c. Bottles           d. Aluminium Cans



        Subjective:


        Q. No.                                      Questions                                         Marks
           1.     Name the fibre used for making parachutes and rock climbing ropes.                     1
           2.     To which kind of synthetic fibres does Terylene belong?                                1
           3.     State one important property of Acrylic.                                               1
           4.        a)  Name the chemical used for making of Acrylic.                                   3
                     b)  Give two properties of Polycot fibres.                                       (1+2)
           5.        a)  What is PET?                                                                    3
                     b)  State two uses of PET.                                                       (1+2)





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