MCQ practice · SSC Chemistry Board questions · Chapter 5: Chemical Bond
Which compound has the weakest van der Waals force?
Think it through first, then pick an option.
- a Ethanol
- b Camphor
- c Naphthalene
- d Carbon dioxide
Answer and explanation
Correct answer: d Carbon dioxide
CO₂ is a gas; between gaseous covalent molecules there is hardly any van der Waals force.
Why the other options are wrong
- a Ethanol: Ethanol is a liquid, so some van der Waals force acts between its molecules.
- b Camphor: Camphor is a solid, with more van der Waals force than a gas.
- c Naphthalene: Naphthalene is a solid, so the force is larger.
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