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What would be the freezing point of aque...

What would be the freezing point of aqueous solution containing 17 g of `C_(2)H_(5)OH` in 100 g of water `(K_(f) H_(2)O = 1.86 K mol^(-1)kg)` :

A

`-0.69^@C`

B

`-0.34^@C`

C

`0.0^@C`

D

`0.34^@C`

Text Solution

Verified by Experts

The correct Answer is:
A
`DeltaT_f =(1000 xx 1.86 xx 17)/(46 xx 1000) = 0.69^@C`
`T_f = 0 - 0.69 =- 0.69^@C`
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