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A solution of 0.450g of urea (mol.wt 60)...

A solution of `0.450g` of urea (mol.wt 60) in `22.5g` of water showed `0.170^(@)C` of elevation in boiling point, the molal elevation constant of water:

A

`0.51`

B

`0.95`

C

`0.25`

D

`2.25`

Text Solution

Verified by Experts

The correct Answer is:
A
`0.17 = ((0.45)/(60))/(22.9) xx 1000 xx K_(b)`
`(0.17)/(0.33) = K_(b), K_(b) = 0.51`
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