Which one of the following solution has least freezing point ?
0.2 m KCl
0.2 m NH2-CO-NH2
0.2 m C12H22O11
0.2 m CaCl2
Depression of freezing point is a colligative property;
Greater the concentration of the solution lesser the freezing point;
T0-T∝ molality; Effective concentation in options 1,2,3,4 is 0.4 M, 0.2 M, 0.2 M and 0.6 M ;