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Chemistry · May / June 2017 · Paper 12 · Question 5

5070Ion and ionic bonds

The table shows some properties of four substances. Which substance is an ionic compound?

  1. Amelting point –102 °C; does not conduct electricity when solid; dissolves in water; conducts electricity in aqueous solution
  2. Bmelting point 801 °C; does not conduct electricity when solid; dissolves in water; conducts electricity in aqueous solution
  3. Cmelting point 842 °C; conducts electricity when solid; dissolves in water; conducts electricity in aqueous solution
  4. Dmelting point 3000 °C; conducts electricity when solid; does not dissolve in water; does not conduct electricity in aqueous solution

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Correct answer: B. melting point 801 °C; does not conduct electricity when solid; dissolves in water; conducts electricity in aqueous solution

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