Give the characteristic properties and uses of the following(i). Polythene (ii).Polystyrene (iii) Teflon
Answers
Answer:
(a) The properties and uses of polythene are as follows:
Properties:
1) It is water resistant.
2) It is strong but flexible and can be rolled into sheets and moulded into different shapes.
Uses:
Polythene sheets are used for the packaging of liquids such as milk. Polythene pipes are used to transport liquids such as oil and water. Polythene containers are used to store liquids.
(b) The properties and uses of polystyrene are as follows:
Properties:
1) It can be easily moulded.
2) It has poor chemical resistance.
Uses:
It is used for the packaging of delicate materials like electronic items. It is used to make thermocol. It is also used to insulate the hollow walls of the refrigerator.
(c) The properties and uses of teflon are as follows:
Properties:
1) It is slippery and is not affected by heat.
2) It does not react chemically with other substances.
Uses:
It is used as a non-stick coating on pans and other cooking utensils. It is used for making gaskets, pump packings, valves, seals etc.
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