Boiling point of halogens _ down the group?
Correct answer: A. Increases
- A. Increases
- B. Decreases
- C. Remains the same
- D. Shows abnormal behavior
Explanation
Halogens are non-polar species, hence London dispersion forces act among them and these forces are directly proportional to molecular weight.→ London dispersion forces ∝ B.P. and M.P. in such non-polar species.Thus, the boiling point of halogens increases down the group.
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About Evaporation, Boiling Point and Vapour Pressure
Evaporation is the escape of higher-energy molecules from a liquid surface, while vapour pressure is the pressure exerted by vapour in equilibrium with that liquid. The topic distinguishes evaporation from boiling and relates both to temperature, intermolecular forces, surface area, atmospheric pressure and the boiling point.
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