Question

A zinc wire discharges the green colour of ferrous sulphate and iron wire discharges the blue colour of copper sulphate. Arrange the metals in decending order givethe chemical reaction also.

Answer 1

Hey mate !!

Here's your answer !!

Zinc sulphate displaces the green colour of Iron sulphate into white colour. This is because Zinc being more reactive than Iron, can displace its lower reactive metals due to which the ions get exchanged. Due to this the colour change occurs.

Eqn: Zn + FeSO4 ----> ZnSO4 + Fe

This reaction is called as displacement reaction where the reactive metal displaces the salt of a lower reactive metal.


Similarly, Iron displaces the blue colour of Copper sulphate into green colour. This is because Iron is more reactive than Copper due to which Iron displaces Copper from its salt solution.

Eqn: Fe + CuSO4 ------> FeSO4 + Cu

This reaction is also called Displacement reaction where the reactive metal displaces the salt of a lower reactive metal.

Based on their reactivity we can arrange them as follows:

Zn > Fe > Cu

Hope my answer helped you !!

Cheers !!