An aqueous solution of sodium chloride freezes below 273 K. Explain the lowering in freezing points of water with the help of a suitable diagram. 1

Answer

When `NaCl` is dissolved in water, the vapour pressure of solution becomes less and at a lower temperature vapour pressure of solid solvent and liquid solvent becomes equal, i.e., lowering in freezing point takes place `(##RES_PHY_CHM_V01_XII_C02_E01_210_A01##)`