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If 0.2 molal aqueous solution of a weak ...

If 0.2 molal aqueous solution of a weak acid (HA) is 40% ionised then the freezing point of the solution will be (K_f for water = 1.86degC/m

A

`-1.52degC`

B

`-0.52degC`

C

`-1.0degC`

D

`-2.22degC`

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