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Give the preparation and used of polysty...

Give the preparation and used of polystyrene.

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Polystyrene is an addition polymer of styrene.
`underset("Styrene")(nCH_2 = overset(C_6H_5)overset(|) CH) overset("Polymerise")to underset("Polystyrene")([--CH_2 - overset(C_6H_5)overset(|)CH--]_n)`
Uses : In the form of thermocol, it is a good thermal insulator. It is used for making disposable ups for hot drinks, radio and TV cabenets etc.
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