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A 0.2 molal aqueous solution of a weak a...

A 0.2 molal aqueous solution of a weak acid (HX) is 20 percent ionised. The freezing point of this solution is: (`K_f` = 1.86 K/m for water)

A

`-0.45^@C`

B

`-0.90^@C`

C

`-0.31^@C`

D

`-0.53^@C`

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The correct Answer is:
A
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