In comparison to a 0.01 M solution of glucose, the depression in freezing point of a 0.01 M MgCl2 solution is

As we know that depression in freezing point is directly related to van't Hoff factor (i) and greater the value of i, greater will be the depression in freezing point. Hence, depression in freezing point of MgCl2 is about 3 times of glucose.