Question

(a) Give two general properties of ionic compounds and two those of covalent compounds.
(b) State one test by which sodium chloride can be distinguished from sugar.

Answer 1

Answer:

• Ionic - High melting and boiling point, good conductors of electricity in aqueous solutions.
• Covalent - Bad conductors of heat,low melting and boiling point.
• Sodium chloride and sugar can be distinguished by the electrical conductivity test. Sugar, being a covalent compound, does not conduct electricity when dissolved in water but sodium chloride when dissolved in water conducts electricity.

Answer 2

Answer:

1. Ionic - High melting and boiling point, good conductors of electricity in aqueous solutions.
2. Covalent - Bad conductors of heat,low melting and boiling point.
3. Sodium chloride and sugar can be distinguished by the electrical conductivity test. Sugar, being a covalent compound, does not conduct electricity when dissolved in water but sodium chloride when dissolved in water conducts electricity.