Mass of Urea $\left(\mathrm{NH}_{2} \mathrm{CONH}_{2}\right)$ required to be dissolved in $1000 \mathrm{~g}$ of water in order to reduce the vapour pressure of water by is _________ g. (Nearest integer)

80 mole percent of $\mathrm{MgCl}_{2}$ is dissociated in aqueous solution. The vapour pressure of $1.0 ~\mathrm{molal}$ aqueous solution of at is ____________

A gaseous mixture of two substances A and B, under a total pressure of $0.8$ atm is in equilibrium with an ideal liquid solution. The mole fraction of substance A is $0.5$ in the vapour phase and $0.2$ in the liquid phase. The vapour pressure of pure liquid is __________ atm. (Nearest integer)

When a certain amount of solid A is dissolved in $100 \mathrm{~g}$ of water at $25^{\circ} \mathrm{C}$ to make a dilute solution, the vapour pressure of the solution is reduced to one-half of that of pure water. The vapour pressure of pure water is . The number of moles of solute A added is _____________. (Nearest Integer)

The vapour pressures of two volatile liquids A and B at 25$^\circ$C are 50 Torr and 100 Torr, respectively. If the liquid mixture contains 0.3 mole fraction of A, then the mole fraction of liquid B in the vapour phase is ${x \over {17}}$. The value of x is ______________.

An artificial cell is made by encapsulating $0.2 \mathrm{~M}$ glucose solution within a semipermeable membrane. The osmotic pressure developed when the artificial cell is placed within a $0.05 \mathrm{~M}$ solution of $\mathrm{NaCl}$ at is ________ bar. (nearest integer).

An aqueous solution of volume $300 \mathrm{~cm}^{3}$ contains $0.63 \mathrm{~g}$ of protein. The osmotic pressure of the solution at is 1.29 mbar. The molar mass of the protein is ___________

A 0.166 g sample of an organic compound was digested with conc. H₂SO₄ and then distilled with NaOH. The ammonia gas evolved was passed through 50.0 mL of 0.5 N H₂SO₄. The used acid required 30.0 mL of 0.25 N NaOH for complete neutralization. The mass percentage of nitrogen in the organic compound is ____________.

At $27^{\circ} \mathrm{C}$, a solution containing $2.5 \mathrm{~g}$ of solute in of solution exerts an osmotic pressure of . The molar mass of the solute is ___________ (Nearest integer)

The osmotic pressure of blood is 7.47 bar at 300 K. To inject glucose to a patient intravenously, it has to be isotonic with blood. The concentration of glucose solution in gL^$-$1 is _____________.

(Molar mass of glucose = 180 g mol^$-$1, R = 0.083 L bar K^$-$1 mol) (Nearest integer)

A solution containing $10 \mathrm{~g}$ of an electrolyte $\mathrm{AB}_2$ in of water boils at . The degree of ionization of the electrolyte is _________ . (nearest integer)

$2.5 \mathrm{~g}$ of a non-volatile, non-electrolyte is dissolved in $100 \mathrm{~g}$ of water at $25^{\circ} \mathrm{C}$. The solution showed a boiling point elevation by . Assuming the solute concentration is negligible with respect to the solvent concentration, the vapor pressure of the resulting aqueous solution is _________ of (nearest integer)