Question

what is the colour of copper sulphate solution why does it colour change when iron fillings are added to it

Answer 1

due to displacement reaction its colour changes to green.

Answer 2

Copper sulphate solution is blue in colour......

When copper sulphate solution reacts with iron, displacement reactions takes place as iron being more reactive displaces copper from copper sulphate and form iron sulphate which is green in colour........ Thus the blue color of copper sulphate solution changes to green due to formation of iron sulphate