When a solution containing ‘w’ g of urea...

When a solution containing ‘w’ g of urea in 1 kg of water is cooled to `-0.372^(@)C`, 200 g of ice is separated. If `K_(f)` for water is 1/86 L kg `mol^(-1)`, w is :

A

4.8 g

B

12.0 g

C

9.6 g

D

6.0 g

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The correct Answer is:

C

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