During osmosis, flow of water through a semipermeable membrane is

A solution of acetone in ethanol

A solution containing 10 g per dm³ of urea (molecular mass = 60 g mol^$$-$$1) is isotonic with a 5% solution of a nonvolatile solute is

A solution of urea (mol. mass 56 g mol^$$-$$1) boils at 100.18^oC at the atmospheric pressure. If K_f and K_b for water are 1.86 and 0.512 K kg mol^$$-$$1 respectively, the above solution will freeze at