`MX_(2)` dissociates into `M^(2+)` and `X^(-)` ions in an aqeous solution, with a degree dissociation `(alpha)` of 0.5. The ratio of the observed depression of freezing point of the aqueous solution to the value of the depression of freezing point in the absence of ionic dissociation is

Answer

2

Explanation

`((DeltaT_(f))_(obs))/((DeltaT_(f))_(cal))=i=1+2alpha`