Colligative Properties

The molecular weight of benzoic acid in benzene as determined by depression in freezing point method corresponds to

Pure water freezes at and bar. The addition of of ethanol to of water changes the freezing point of the solution. Use the freezing point depression constant of water as . The figures shown below represent plots of vapour pressure (V.P.) versus temperature (T). [molecular weight of ethanol is ] Among the following, the option representing change in the freezing point is

At 300 K, an ideal dilute solution of a macromolecule exerts osmotic pressure that is expressed in terms of the height (h) of the solution (density = 1.00 g cm ) where h is equal to 2.00 cm. If the concentration of the dilute solution of the macromolecule is 2.00 g dm , the molar mass of the macromolecule is calculated to be g mol . The value of is ____. Use: Universal gas constant (R) = 8.3 J K mol and acceleration due to gravity (g) = 10 m s

At 300 K, an ideal dilute solution of a macromolecule exerts osmotic pressure that is expressed in terms of the height (h) of the solution (density = 1.00 g cm ) where h is equal to 2.00 cm. If the concentration of the dilute solution of the macromolecule is 2.00 g dm , the molar mass of the macromolecule is calculated to be g mol . The value of is ____. Use: Universal gas constant (R) = 8.3 J K mol and acceleration due to gravity (g) = 10 m s