Question

When iron filings are added to copper sulphate solution, confirms the occurrence of a chemical change.

• A. evolution of gas
• B. formation of ppt
• C. change in colour

Answer 1

The correct option is C change in colour

The copper sulphate solution is blue in colour. When iron reacts with it, the solution gradually obtains green colour due to the formation of ferrous sulphate.
$\text{Fe(s)}+{\text{CuSO}}_4\text{(aq)}\to {\text{FeSO}}_4\text{(aq)}+\text{Cu}\text{(s)}$