AIPMT PRELIMS 2005 Chemistry Colligative Properties MCQ Question
A solution of urea (mol. mass 56 g mol⁻¹) boils at 100.18°C at the atmospheric pressure. If kf and kb for water are 1.86 and 0.512 K kg mol⁻¹ respectively, the above solution will freeze at:
-6.54°C
-65.4°C
65.4°C
-0.654°C
Correct Answer
Detailed Explanation
The freezing point depression can be calculated using ΔTf = iKfm, where m is the molality. The calculated freezing point i.654°C.
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