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The amount of urea to be dissolved in 50...

The amount of urea to be dissolved in `500` cc of water `(K_(f)=1.86)` to produce a depresssion of `0.186^(@)C` in the freezing point is :

A

9g

B

6g

C

3g

D

0.3g

Text Solution

Verified by Experts

The correct Answer is:
C
`DeltaT=K_(f)xx(w_(B)xx1000)/(m_(B)xxw_(A))`
`0.186=1.86xx(w_(B)xx1000)/(60xx500)`
`w_(B)=3g`]
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