CHEMISTRY DEPARTMENT WAID ACADEMY Standard Grade Topic 13.

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Presentation transcript:

CHEMISTRY DEPARTMENT WAID ACADEMY Standard Grade Topic 13

Most plastics are made from chemicals obtained from 1.Coal. 2.Plant material. 3.Natural gas. 4.Crude oil. 25

If a material is described as being biodegradable it can be 25 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.

The toxic gas formed when PVC is burned is 1.hydrogen cyanide. 2.sulphur dioxide. 3.hydrogen chloride. 4.carbon dioxide. 25

A thermoplastic is a plastic material which 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. 25

Electrical plugs and sockets are made from plastics which are 1.thermosetting plastics. 2.thermoplastic plastics. 3.biodegradable plastics. 4.made from PVC. 25

Plastics are made up of long chain molecules called 1.monomers 2.polymers 3.residues 4.fractions. 25

The process of joining many small molecules together to make a plastic is called. 1.Recycling. 2.Incineration. 3.Monomerisation. 4.Polymerisation. 25

The small molecules which are joined together to make plastics are called 1.Plastimers. 2.Monomers. 3.Elastomers. 4.Polymers. 25

Which monomer is used to make the polymer chain shown below? 1.A 2.B 3.C 4.D. 25

What would be formed when three of this monomer are joined? 1.A 2.B 3.C 4.D. 25