2012 · Q41
When an iron nail is dipped in copper sulphate solution, a brownish coating forms on the nail. The reaction is an example of
general-sciencechemistry
- Acombination reaction
- Bdecomposition reaction
- Cdisplacement reaction
- Ddouble displacement reaction
Explanation
Iron, being more reactive, displaces copper from copper sulphate solution: Fe + CuSO4 -> FeSO4 + Cu.