Question

Why is the colour of CuSO, change when an iron nail is dipped in it?​

Answer 1

Answer:

green

Iron is more reactive than copper. So, when an iron nail is dipped in a copper sulphate solution, iron displaces copper from its solution to form iron sulphate, which is green in color. Hence, the blue color of copper sulphate solution changes into green color because of this displacement reaction.

$cuso4 + fe - - > feso4 + cu$

Answer 2

Answer:

as decomposition reaction place in this reaction .

Explanation:

as copper displace the iron.