MCQ practice · SSC Chemistry Board questions · Chapter 5: Chemical Bond
At normal temperature and pressure, which has the weakest van der Waals force?
Think it through first, then pick an option.
- a C₂H₅OH
- b NH₃
- c S₈
- d H₂O
Answer and explanation
Correct answer: b NH₃
Correct. NH₃ is a gas, and between gaseous molecules the force is hardly there.
Why the other options are wrong
- a C₂H₅OH: Ethanol is a liquid, so the force is there.
- c S₈: S₈ is a solid; the force is greatest in solids.
- d H₂O: H₂O is a liquid, with more force than a gas.
More board questions on this topic
- In compound B−
- How many lone pairs of electrons are there in the molecule of the…
- How many lone pairs of electrons are there in the compound formed by…
- For oxygen:
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