Question

when an iron nail is dipped in blue colour solution,A theblue colour solution faded away after sometimes over.name A.what is the name of the reaction.

Answer 1

The reaction is between an iron nail, which is grey in colour and copper sulphate solution, which is blue in colour.

The reaction is,

Fe+CuSO₄→FeSO₄+Cu

The iron reacts with copper to form ferrous sulphate, due to which the blue colour fades and becomes green.

This reaction is a displacement reaction.