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1.0 g of a non-electrolyte solute( mol. ...

`1.0 g` of a non-electrolyte solute( mol. Mass `250.0 g mol^(-1)`) was dissolved in `5.12 g` benzene. If the freezing point depression constant, `K_(f)` of benzene is `5.12 K kg mol^(-1)`, the freezing point of benzene will be lowered by:

A

`0.5 K`

B

`0.2 K`

C

`0.4 K`

D

`0.3 K`

Text Solution

Verified by Experts

The correct Answer is:
C
`Delta T_(f) = (1000xx K_(f) xx w)/(m xx W)`
`Delta T_(f) = (1000 xx 5.12 xx 1)/(250 xx 51.2) = 0.4 K`
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