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What is the freezing point of a solution...

What is the freezing point of a solution containing `8.1g Br `in `100g` water assuming the acid to be `90%`ionised(`K_(f)`for water =`1.8K "mole"^(-1))`

A

`0.85^(@)C`

B

`+3.53^(@)C`

C

`0^(@)C`

D

`-3.5^(@)C`

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The correct Answer is:
D
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