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Chemistry · May / June 2025 · Paper 12 · Question 7

5070Ion and ionic bonds

Which statement about magnesium oxide is correct?

  1. AIt has a high melting point and good electrical conductivity at r.t.p.
  2. BIt is made up of magnesium anions and oxygen cations.
  3. CIt is an ionic compound and has good electrical conductivity when molten.
  4. DIt is strongly bonded because of electrons shared between magnesium atoms and oxygen atoms.

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Correct answer: C. It is an ionic compound and has good electrical conductivity when molten.

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