Q. What happens when copper rod is dipped in iron sulphate solution?

A
Copper displaces iron
B
Blue color of copper sulphate solution is obtained
C
No reaction takes place
D
Reaction is exothermic
Solution:

Iron is more reactive than copper. Hence, Cu will not displaces iron from iron sulphate solution. Hence, no reaction will take place.

When iron rod is kept dipped in copper sulphate solution for sometimes a brown coating is formed on the solution on the iron rod. This happens, according to reactivity series, because iron is more reactive than copper. So iron displaces copper from copper sulphate and forms iron sulphate.

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