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.

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From amongst the metals sodium,calcium,aluminium,copper and magnesium,name the metal:
$(i)$ which reacts with water only on boiling,and
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