Question

If iron filings are put into blue copper sulphate solution it turns. .........

Answer 1

It will turn into iron sulphate, because it is more reactive than copper.
This reaction is Displacement reaction.

CuSO4 + Fe gives FeSO4 + Cu

Answer 2

Heya,

Iron is more reactive than copper.

This can be proved by the following activity:

When you take some Iron fillings and dip them in the Copper sulphate solution:-

You will notice that there is a colour change in the solution which is caused due to the displacement of Copper from it solution.

This shows that Iron is more reactive than Copper.

Hope it helps u.......