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0.2 molal acid HX is 20% ionised in solu...

0.2 molal acid HX is 20% ionised in solution `K_"f"` = 1.86 K `"molality"^(–1)`. The freezing point of the solution is -

A

– 0.45

B

– 0.90

C

– 0.30

D

–0.53

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