What will happen when:
$(i)$ Magnesium is treated with very dilute nitric acid?
$(ii)$ Steam is passed over red hot iron?

• A
  Magnesium produces hydrogen gas; Iron produces iron oxide and hydrogen gas.
• B
  Magnesium produces nitrogen dioxide; Iron produces iron oxide.
• C
  Magnesium produces nitric oxide; Iron produces iron hydroxide.
• D
  Magnesium produces ammonia; Iron produces iron nitrate.