CHEMISTRY DEPARTMENT WAID ACADEMY Plastics. Most plastics are made from chemicals obtained from 1.biogas 2.plant material 3.crude oil 4.natural gas 20.

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Presentation transcript:

CHEMISTRY DEPARTMENT WAID ACADEMY Plastics

Most plastics are made from chemicals obtained from 1.biogas 2.plant material 3.crude oil 4.natural gas 20

Which three materials are all plastics? 20 1.Wool, Nylon and PVC 2.Polythene, Formica and PVC 3.Cotton, Polystyrene and Bakelite 4.Silk, PVC and Nylon

If a material is described as being biodegradable it can be 20 1.broken down by bacteria in the soil and rot away. 2.softened by heating. 3.disposed of by burning. 4.easily moulded into different shapes.

Most burning plastics produce 20 1.sulphur dioxide 2.nitrogen dioxide 3.hydrogen 4.carbon monoxide

A thermoplastic is a plastic material which 20 1.burns without producing toxic fumes. 2.can be broken down by bacteria in the soil. 3.can be reshaped on heating. 4.does not soften on heating.

Electrical plugs and sockets are made from plastics which are 20 1.thermosetting plastics. 2.thermoplastic plastics. 3.biodegradable plastics. 4.made from PVC

Plastics are made up of long chain molecules called 20 1.monomers. 2.polymers. 3.residues. 4.Fractions.

The process of joining many small molecules together to make a plastic is called recycling. 2.incineration. 3.monomerisation 4.polymerisation.

The small molecules which are joined together to make plastics are called 20 1.plastimers. 2.monomers. 3.polymers. 4.elastomers.

Recycling of plastics can be difficult because 20 1.most plastics burn. 2.plastics are not widely used. 3.plastics are non- biodegradable. 4.there are many different types of plastic in common use.