Metals, Plastics, Fertilisers, Nuclear Chemistry Worksheet - National 5 Unit 3 Page 2
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13Exercise 1 – Metals Revision
1. Aluminium is used to make aircraft, ladders and cooking foil. Copper is used to make
hot and cold water pipes, wiring and the bases of cooking pots. Copy the following
table and use this information and your knowledge of properties of metals to complete
it.
Metal
Use
3 Properties which make the metal suitable for
these uses
2. The results of experiments with the metals A, B, C and D are shown below:
Metal
Reaction with cold water
Reaction with dilute acid
A
No reaction
Hydrogen formed
B
Hydrogen formed
Hydrogen formed
C
Very slow reaction
Hydrogen formed
D
No reaction
No reaction
a) Use this information to place the metals in order of reactivity, starting with the
most reactive.
b) Suggest a name for each of the metals A, B, C & D.
3. A pupil carried out an experiment on potassium oxide, tin oxide and mercury oxide. On
heating the three metal oxides it was found that one decomposed to form a liquid
metal and oxygen gas. On heating with carbon, one of the other metal oxides reacted
to form the metal.
a) Which metal would decompose on heating alone?
b) Which metal would decompose on heating with carbon?
c) Suggest a method of extracting the final metal from its oxide.
4. Metals are often mixed with other metals to improve the chemical and physical
properties of the metal.
a) What is the name given to these mixtures?
b) Name 2 of the mixtures, give the metals present in the mixture and 2 uses for
each.
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