Solutions

Pure water freezes at 273 K and 1 bar. The addition of 34.5 g of ethanol to 500 g of water changes the freezing point of the solution. Use the freezing point depression constant of water as 2Kkgmol−1.The figures shownbelow represent plots of vapour pressure (V.P.) versus temperature (T). [molecular weight of ethanol is 46gmol−1] Among the following, the option representing change in the freezing point is :