The freezing point of one molal NaCl solution assuming NaCl to be 100% dissociated in water is (molal depression constant = 1.86)
-1.86°C
-3.72°C
+1.86°C
+3.72°C
The freezing point of 1 molal NaCl solution assuming NaCl to be 100% dissociated in water is Kf = 1.86 k kg mol-1)