A compound X has a melting point of 801°C and conducts electricity when dissolved in water but not when solid. What type of bonding does compound X have?

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Question

A compound X has a melting point of 801°C and conducts electricity when dissolved in water but not when solid. What type of bonding does compound X have?

Accepted Answer

Ionic bonding — Award 1 mark for ionic bonding. The high melting point indicates strong bonds. Electrical conductivity only when dissolved (ions free to move) is characteristic of ionic compounds. A is incorrect because covalent compounds typically have lower melting points and do not conduct electricity. B is incorrect because metals conduct electricity in solid state. D is incorrect because these are weak forces with very low melting points.

Answer

Metallic bonding

Answer

Covalent bonding

Answer

Van der Waals forces

Answer

Ionic bonding

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