The vapor pressure of liquids of similar chemical nature at any particular temperature _______________ with increase in the molecular weight?
Correct answer: B. Decreases
- A. Increases
- B. Decreases
- C. Remains unchanged
- D. Either A. or B.; depends on the liquid
Explanation
For chemically similar liquids, increasing molecular weight generally strengthens intermolecular attraction and lowers volatility, so vapor pressure decreases. This trend assumes the liquids have comparable chemical structures.
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