Chemistry
NULL
Medium
Question
Which has the minimum freezing point ?
A
One Molal NaCl
B
One molal KCl solution
C
One molal CaCl2
✓ Official correct answer
D
One molal urea solution
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A
One Molal NaCl
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B
One molal KCl solution
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C
One molal CaCl2
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D
One molal urea solution
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Explanation
Since freezing point depression depends on the van't Hoff factor, CaCl2 (which dissociates into 3 ions) produces the greatest depression and thus the minimum (lowest) freezing point among these solutions.
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