A solution is prepared by dissolving 1.8 g of a non-volatile solute in 90 g of water. The vapor pressure of the solution is found to be 23.375 mm Hg at 25°C. If the vapor pressure of pure water at 25°C is 23.76 mm Hg, what is the molar mass of the solute? (Molar mass of water = 18 g/mol)

A 0.5 molal aqueous solution of a weak acid (HX) is 20 per cent ionized. The lowering in freezing point of this solution is :

$\left( {{K_f} = 1.86\;{\rm{K}}/{\rm{m}}\;{\rm{ for }}\;{\rm{water}}} \right)$

If 0.15 g of a solute dissolved in 15 g of solvent is boiled at a temperature higher by $0.216^\circ C$ than that of the pure solvent, the molecular weight of the substance is (molal elevation constant for the solvent is $2.16^\circ C$)

Maximum lowering of vapour pressure is observed in the case of

For an aqueous solution, freezing point is $-0.186^\circ$. Elevation of the boiling point of the same solution is $({k_f} = 1.86^\circ \;{\rm{ }}mo{l^{ - 1}}\;and\;{k_b} = 0.512^\circ \;{\rm{ }}mo{l^{ - 1}}\;kg)$

The freezing point of water is depressed by $0.37^\circ C$ in a 0.01 mol NaCl solution. The freezing point of 0.02 molal solution of urea is depressed by

At Abu mountains water boils at $96^\circ {\rm{C}}$. What amount of NaCl be added in 1 kg water so that it boils at ${\rm{100}}^\circ {\rm{C}}\;{K_b}\;{\rm{for}}\;{{\rm{H}}_2}{\rm{O}} = 0.52\;{\rm{K}}\;{\rm{molalit}}{{\rm{y}}^{ - 1}}$

A solution of sucrose (molar mass $342\;g\;{\rm{mo}}{{\rm{l}}^{ - 1}}$ has been produced by dissolving 68.5 g sucrose in 1000 g water. The freezing point of the solution obtained will be : $({K_f}\;{\rm{for}}\;{{\rm{H}}_2}{\rm{O}} = 1.86\;{\rm{K}}\;{\rm{kg}}\;{\rm{mo}}{{\rm{l}}^{ - 1}})$

The vapour pressure will be lowest of

The freezing point (in\;^\circ C) of solution containing $0.1\;g\;of\;{K_3}\left[ {Fe{{\left( {CN} \right)}_6}} \right]\left( {{\rm{mol}}{\rm{.wt}}\;329} \right)$ in 100 g of water ${K_f} = 1.86\;{\rm{K}}\;{\rm{ kg }}\;{\rm{mo}}{{\rm{l}}^{ - 1}}$ is

Which of the following shows maximum depression in freezing point?