A solution of urea (mol. mass 56g mol^-1) boils at 100.18°C under atmospheric pressure. If K_f and K_bfor water are 1.86 and 0.512 K kg mol^-1 respectively, the above solution will freeze at

- 6.54°C

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6.54°C

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0.654°C

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-0.654°C

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Solution

The correct option is D -0.654°C

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