The vapor pressure of liquids (having similar chemical nature) at any specified temperature ______________ with increasing molecular weight?
Correct answer: A. Decreases
- A. Decreases
- B. Increases
- C. Remains unchanged
- D. Increases linearly
Explanation
For chemically similar liquids, increasing molecular weight usually strengthens intermolecular attractions and reduces the tendency of molecules to escape into the vapour phase. Hence, vapour pressure generally decreases with molecular weight.
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