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The molal depression constant for water ...

The molal depression constant for water is `1.86^(@)C`. The freezing point of a `0.05-molal` solution of a non-electrolyte in water is

A

`-1.86^(@)C`

B

`-0.93^(@)C`

C

`-0.093^(@)C`

D

`0.93^(@)C`

Text Solution

Verified by Experts

The correct Answer is:
C
`Delta T_(f)=K_(f)xx` molality `=1.86xx0.05=0.093^(@)C`
Thus freezing point `=0-0.093=-0.093^(@)C`.
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The freezing point of a 0.05 molal solution of a non-electrolyte in water is [K_(f)=1.86K//m]

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