The depression in freezing point for `1m` urea,`1m` glucose and `1mNaCl` are in the ratio

The depressions in freezing point for 1 M urea, 1 M glucose and 1M NaCl are in the ration :

Depression in freezing point for 1 M urea, 1 M NaCl and 1 M CaCl_(2) are in the ratio of

K_(f) of 1,4-"dioxane is" 4.9mol^(-1) for 1000g .The depression in freezing point for a 0.001m solution in dioxane is

Elevation in the boiling point for 1 molal solution of glucose is 2K. The depression in the freezing point for 2 molal solution of glucose in the same solvent is 2K. The relation between K_(b) and K_(f) is

Equimolal solutions A and B show depression in freezing point in the ratio 2:1 . A remains in the normal state in solution. B will be

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