Q.1.
Which metal is the most appropriate to make jewellery from?
Q.2.
Why is iron rarely used as pure iron?
Q.3.
Why is gold used for jewellery?
Q.4.
Which metal would be the most appropriate to make overhead power lines from?
Q.5.
Why is potassium kept stored in oil?
Q.6.
Why is iron better than aluminium for making bridges?
Q.7.
Aluminium is a useful metal to use because it does not corrode easily in air. Why?
Q.8.
Copper is often used for water pipes and electrical wires. Pick two properties of copper which make it useful for this purpose.
Q.9.
Which two of the following statements could explain why aluminium is preferred to iron for making cans for drinks?
Q.10.
Why is aluminium used to make aeroplane bodies?