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If the elevation in boiling point of a s...

If the elevation in boiling point of a solution of non-volatile, non-electrolytic and non-associating solute in a solvent `(K_(b) = x "K kg mol"^(-1) )` is `y` K, then the depression in freezing point of solution of same concentration would be (`K_f` of the solvent `=z` K kg mol`""^(-1)` )

A

`(2xz)/(y)`

B

`(yz)/(x)`

C

`(xz)/(y)`

D

`(yz)/(2x)`

Text Solution

Verified by Experts

The correct Answer is:
B
`because Delta T_(b) = K_(b) xx m`
`therefore y= x m`
Again `Delta T_(f) = K_(f) xx m= zm`
`=z xx (y)/(x) = (yz)/(x)`
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