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At certain Hill-station pure water boils...

At certain Hill-station pure water boils at `99.725^(@)C`. If `K_(b)` for water is `0.513^(@)C kg mol^(-1)`, the boiling point of `0.69m` solution of urea will be:

A

`100.079^(@)C`

B

`103^(@)C`

C

`100.359^(@)C`

D

unpredictable.

Text Solution

Verified by Experts

The correct Answer is:
A
`Delta T_(b) = K_(b) xx m =0.513 xx 0.69 = 0.354,`
`T_(b) = 99.725 + 0.354 = 100.079^(@)C.`
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