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.
Frequently asked questions
What is the correct answer to this question?
Because intermolecular forces are weak
Why is this the correct answer?
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.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Carbon and its Compounds. Topic: Covalent bonding.
Student feedback
Was this question useful?
👍 0 Helpful 👎 0 Not helpful
Yes 0% No 0%
0 responsesStudent Reviews
No published reviews yet.
