Question

Which will reduce zinc oxide to zinc?

• A. Mg
• B. Pb
• C. Cu
• D. Fe

Answer 1

Answer: (A)

Mg

Answer 2

Magnesium is more electropositive than zinc, hence it can reduce $Z{{n}^{2+}}$ (magnesium is placed above zinc in electrochemical series).
$Mg + ZnO \to MgO + Zn$