Question

Why does the colour of copper sulphate solution change when
an iron nail is dipped in it?​

Answer 1

Answer:

The colour of copper sulphate solution changes when an iron nail is dipped in it because iron is more reactive than copper. ions are called acids. When an "iron nail" dips into the solution of "copper sulphate" than iron, the copper sulphate displaces copper because "iron" is "more reactive" than "copper".

Answer 2

When an iron nail is dipped in copper sulphate solution , the displacement reaction takes place . The colour of copper sulphate solution fades due to the formation of light green solution of iron sulphate .