STANDARD Chemistry Colligative Properties MCQ Question
What will be the freezing point of a 0.5 m KCl solution? The molal freezing point constant of water is 1.86°C m⁻¹.
−1.86°C
−0.372°C
−3.2°C
0°C
Correct Answer
Detailed Explanation
The freezing point depression is calculated using ΔTₓ = iKₘ × m. For KCl, i = 2. Thus, ΔTₓ = 2 × 1.86 × 0.5 = 1.86°C. The freezing point is 0 − 1.86 = −1.86°C.
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