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Why do covalent compounds generally have low melting and boiling points?

Answer and explanation

Correct answer: Because intermolecular forces are weak

Melting and boiling require separation of particles. Many covalent substances consist of separate molecules, and the intermolecular forces holding those molecules together are relatively weak. Consequently, comparatively little thermal energy is needed to overcome these forces, giving low melting and boiling points. Option A is correct. Option B refers to ionic lattices, which usually require much more energy, while options C and D are not general explanations.

Related tags

Covalent CompoundsMelting PointBoiling PointCovalent BondingCarbon And Its CompoundsScienceClass 10 Mcq

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