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Question

Which of the two has lower freezing point, 2m NaCl or 5m NaCl aqueous solution?


A

2m NaCl solution

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B

Both have same freezing point

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C

5m NaCl solution

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D

The solutions cannot freeze

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Solution

The correct option is C

5m NaCl solution


Since ΔTf for 5m NaCl will be higher than for 2m, 5m NaCl solution freezes at a lower temperature.


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