CBSE Class 10 Science 2020 · Paper 31/2/1 · Question 1
Covalent compounds have low melting and boiling point. Why ?
Answer
Covalent compounds have weak intermolecular forces, so little heat energy is needed to separate their molecules.
Because the forces of attraction between the molecules of a covalent compound (the intermolecular forces) are weak. Melting and boiling only have to separate the molecules from one another, which needs little heat energy, so covalent compounds melt and boil at low temperatures.
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