Question

Explain why
(a) covalent compounds have generally low melting points.
(b) ionic compounds have generally high melting points.

Answer 1

Answer:

Covalent compounds have weak forces of attraction between the binding molecules.Thus less energy is required to break the force of bonding.Therefore covalent compounds have low melting and boiling point.

Ionic compounds have high melting points because there is a strong electrostatic force of attraction between the oppositely charged ions and hence a large amount of energy is required to break the strong bonding force between ions.

Answer 2

Answer:

Covalent compounds have low melting and boiling points because they are made up of electrically neutral molecules. So, the force of attraction between the molecules of a covalent compound is very weak.

Explanation:

Only a small amount of heat energy is required to break these weak molecular forces. That is why covalent compound have low melting boiling points.

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