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Chemistry · May / June 2026 · Paper 12 · Question 4

5070Ion and ionic bonds

Magnesium oxide has a high melting point. It is used to line the inside of furnaces that operate at high temperatures. Why does magnesium oxide have a high melting point?

  1. AIt has metallic bonds.
  2. BIt has strong forces between its molecules.
  3. CIt is a simple molecular substance.
  4. DIt is an ionic compound.

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Correct answer: D. It is an ionic compound.

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