Concept:Metals are arranged in a reactivity series from most reactive (top) to least reactive (bottom). In a displacement reaction, a more reactive metal can replace a less reactive metal from its salt solution.
Explanation:Examine each statement based on the reactivity series:
- Aluminium is above zinc in the series, so aluminium is more reactive than zinc. Option A is false.
- Copper lies below iron in the series, meaning copper is less reactive than iron. Therefore, copper cannot displace iron from ferrous sulphate. Option B is false.
- Iron is above copper, so iron can displace copper from copper sulphate solution. However, iron is below aluminium, so it cannot displace aluminium from aluminium sulphate solution. Option C is true.
- Aluminium is above iron, so aluminium can displace iron from ferrous sulphate. Option D is false.
Thus, only option C correctly describes the displacement behaviour.
Answer:C. Iron can displace copper from copper sulphate solution but cannot displace aluminium from aluminium sulphate solution.
