Question

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

Answer 1

Answer:

Blue colour of the copper sulphate solution changes into green colour & then iron nail acquires a brownish look. This is because that iron is more reactive than copper. The following chemical reaction takes place in this activity. In this reaction, iron displaces copper from CuSO4 solution

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 .