A) \[\Delta {{T}_{f}}\]
B) \[\pi \]
C) \[\Delta {{T}_{b}}\]
D) \[{{K}_{b}}\]
Correct Answer: D
Solution :
Key Idea: The colligative properties are those which depend on number of particles but not on their nature. \[\Delta {{T}_{f}}\] (depression in freezing point), \[\pi \] (osmotic pressure), \[\Delta {{T}_{b}}\] (elevation in boiling point) are colligative properties. \[{{K}_{b}}\] is molal elevation constant and it is not colligative property.
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