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

Answer:

becouse in this reaction the granules of copper get displaced due to action of iron and form green solution