Depression in freezing point

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

Assertion : Depression of freezing point is a colligative property Reason : The depression of freezing point for a solution is directly proportional to the molality of the solution.

Depression of freezing point of which of the following solutions does represent the cryoscopic constant of water ?

In the depression of freezing point experiment, it is found that the: