Solutions

Assertion: Vapour pressure of solvent $A$ increases when a more volatile solvent $B$ is added. Reason : $B$ is more volatile therefore vapour pressure of $B$ is greater than that of $A$.

The vapour pressure of pure $\mathrm{CHCl}_3$ and $\mathrm{CH}_2 \mathrm{Cl}_2$ are 200 and 41.5 atm respectively. The weight of $\mathrm{CHCl}_3$ and $\mathrm{CH}_2 \mathrm{Cl}_2$ are $11.9 \mathrm{~g}$ and $17…

Assertion : The vapour pressure of a liquid decreases if some non volatile solute is dissolved in it. Reason : The relative lowering of vapour pressure of a solution containing a nonvolatile solute is equal to the mole…

Ethylene glycol is used as antifreeze to reduce freezing point of water to $-2.4^{\circ} \mathrm{C}$. What mass of antifreeze is required for $2 \mathrm{~L}$ water? $\left(K_f\right.$ water $\left.=1.86 \mathrm{~K}…

$1 \mathrm{~g}$ of polymer having molar mass $1,60,000 \mathrm{~g}$ is dissolved in $800 \mathrm{~mL}$ water. Calculate the osmotic pressure in pascal at $27^{\circ} \mathrm{C}$. $\left(R=8.314 \mathrm{~J}…

When $45 \mathrm{~g}$ of solute is dissolved in $600 \mathrm{~g}$ water, freezing point gets lowered by $2.2 \mathrm{~K}$, calculate molar mass of solute. $\left(K_f=1.86 \mathrm{~K} \mathrm{~kg}…

Assertion : Azeotropic mixtures are formed only by non-ideal solutions and they may have boiling points either greater than both the components or lesser than both the components. Reason: The composition of the vapour…

The depression in freezing point of $0.1 \mathrm{M}$ aqueous solutions of $\mathrm{HCl}, \mathrm{CuSO}_4$ and $\mathrm{K}_2 \mathrm{SO}_4$ are in the ratio

Assertion : Acetone and aniline shows negative deviations. Reason : H-bonding between acetone and aniline is stronger than that between acetoneacetone and aniline-aniline.

The freezing point of a solution containing $0.2 \mathrm{~g}$ of acetic acid in $20.0 \mathrm{~g}$ benzene is lowered by $0.45^{\circ} \mathrm{C}$. The degree of association of acetic acid in benzene is (Assume acetic…

The relationship between osmotic pressure at $273 \mathrm{~K}$ when $10 \mathrm{~g}$ glucose $\left(P_1\right), 10 \mathrm{~g}$ urea $\left(P_2\right)$ and $10 \mathrm{~g}$ sucrose $\left(P_3\right)$ are dissolved in…

Assertion: An ideal solution obeys Raoult's law. Reason: In an ideal solution, solute-solute as well as solvent-solvent interactions are similar to solute-solvent interactions.