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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 = `1.86^@`C

A

`-1.52^@`C

B

`-0.52^@`C

C

`-1.0^@`C

D

`-2.22^@`C

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