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