Give one use of Teflon.

Name the form of polyester which is replacing materials like glass and used for making bottles and jars.

Name four different plastics.

Which of the two is a thermosetting plastic: PVC or bakelite?

Fill in the following blanks with suitable words:

(a) Synthetic fibres are also called..........or……fibres.

(b) Synthetic fibres are made from raw materials called.............

(c) Like synthetic fibres, plastic is also a ............

(d) The use of plastics can be reduced by using bags made of ............or ................instead of polythene bags.