National 3 Chemistry Unit 3 Revision Chemistry in
- Slides: 14
National 3 Chemistry Unit 3 Revision Chemistry in Society
Chemistry in Society 1 2 3 4 5 6 7 8 9 10 11 12
Complete the table to show the property of the metal which makes it suitable for each use. Choose your answer from the following. conducts heat low density conducts electricity Low Density Conducts Electricity Conducts heat
What term is used to describe naturally occurring compounds of metals? Ores
Give two disadvantages in using a battery rather than mains electricity. Batteries need replaced Less power available Batteries are hard to dispose of
• What effect would rusting have on the strength of an iron bridge? It would weaken
State one method that could be used to protect an iron bridge from rusting. Paint it or Galvanise
1. Which of the following contain only natural fibres? A Cotton and silk B Polyester and silk C Cotton and nylon D Polyester and nylon A
What is meant by a thermoplastic? A plastic that can be reshaped when heated
Uses of plastics are related to their properties. Which line in the table shows a plastic that could be used for covering electrical wires? Plastic Property A PVC Flexible B Kevlar Very strong C Perspex Lets light through D Formica High melting point D
Which of the following properties is suitable for a plastic that is disposed of by burying? A Light C B Thermoplastic C Biodegradable D Insoluble in water
Name the polymer formed from ethene. Poly(ethene)
The graph shows the mass of polythene used in a European country Describe the general trend in the mass of polythene used between 2000 and 2006. It increases
The plastic poly(chloroethene) has many uses. Name the monomer used to make poly(chloroethene). chloroethene
