Question

addition of iron filings to copper sulphate solution changd the colour​

Answer 1

Answer:

when an iron nail is placed in a copper sulphate solution solution, iron displaces copper from copper sulphate solution forming iron sulphate, which is light green in colour. It is because iron is more reactive than copper.

Answer 2

Answer:

addition of iron fillings to copper sulphate solution changes its colour from blue to green