Question

Explain how you could use displacement reactions to distinguish between
iron and zinc. You may use any solutions you choose.​

Answer 1

Explanation:

Magnesium displaces three metals, zinc displaces two metals, iron displaces one metal and copper does not displace any of the other three metals. So, the order of reactivity, starting with the most reactive first, is: magnesium.

Answer 2

Answer:

We could use the solution of copper sulphate.

if adding metal changes the color of copper sulphate solution from blue to colorless, it means the metal is zinc.

If adding metal changes the color of the solution from blue to green, then the metal is iron.