0.5 molal aqueous solution of a weak acid (HX) is 20% ionised. If K_f for water is 1.86 K kg mol^$$-$$1, the lowering in freezing point of the solution is

During osmosis, flow of water through a semipermeable membrane is

A solution of acetone in ethanol

1.00 g of a non-electrolyte solute (molar mass 250 g mol^$$-$$1) was dissolved in 51.2 g of benzene. If the freezing point depression constant, K_f of benzene is 5.12 K kg mol^$$-$$1, the freezing point of benzene will be lowered by