Solutions practice · Medium

Van't Hoff factor for the aqueous solution of $\mathrm{AlCl}_3$ is 2.8. The percentage dissociation of $\mathrm{AlCl}_3$ is:

Which of the following solutions boils at the highest temperature

Which of the following on addition in 1.0 molal KI solution will give rise to increase a vapour pressure?

$11.2 \mathrm{~L}$ of ${HCl}({g})$ is completely dissolved in $500 \mathrm{~ml}$ of aqueous solution. The molality of the solution is

What is the molality of pure water?

In an osmotic pressure measurement experiment, a $5\%$ solution of compound ‘X’ is found to be isotonic with a $2\%$ acetic acid solution . The gram molecular mass of ‘X’ is

The temperature at which $10 \%$ aqueous solution $(w / V)$ of glucose exhibits the osmotic pressure of $16.4 \mathrm{~atm}$, is $\left(R=0.082 \mathrm{~dm}^3 \mathrm{~atm} \mathrm{~K} \mathrm{~Kol}^{-1}\right)$

Statement I: Reverse osmosis is used in the desali- nation of sea water.

Statement II: When the applied pressure is more than the osmotic pressure, pure water is squeezed out of sea water through the membrane.

Statement - I: When an ideal binary solution of liquids A and B is distilled, the boiling point of
the distillate becomes lower than that of the parental liquid solution.

Statement - II: When an ideal binary solution of liquids A and B is distilled, the distillate
contains relatively larger amount of the more volatile liquid.

The relative lowering of vapour pressure of an aqueous solution containing non-volatile solute is 0.0125. The molality of the solution is

If molality of the dilute solutions is doubled, the value of molal depression constant $\left({K}_{{f}}\right)$ will be

A liquid solution is formed by mixing 10 moles of aniline and 20 moles of phenol at a temperature where the vapour pressures of pure liquid aniline and phenol are $90$ and $87 \mathrm{~mm} \mathrm{~Hg},$ respectively. The possible vapour pressure of solution at that temperature is

Two liquids $A$ and $B$ are mixed in a ratio of $2: 3$. If $P_A^{\circ}=100 \,{mmHg}$ and $P_B^{\circ}=300 \,{mmHg}$, then the mole fraction of $A$ in vapour phase will be

The boiling point of $0.2 \mathrm{~mol} \mathrm{~kg}^{-1}$ solution ${X}$ in water is greater than equimolal solution of ${Y}$ in water. Which one of the following statements is true in this case?

Two liquids X and Y form an ideal solution at 300K,vapour pressure of the solution containing 1 mol of X and 3, mol of Y is 550 mmHg. At the same temperature, if 1 mol of Y is further added to this solution, vapour pressure of the solution increases by 10 mmHg. Vapour pressure (in mmHg)of XandY in their pure states will be, respectively

Assertion: Soda bottles are sealed under high pressure.

Reason: High pressure increases the solubility of carbon dioxide gas.

The value of Henry's constant $K_{\mathrm{H}}$ is

At $300 \mathrm{~K}$, the vapour pressure of an ideal solution containing 1 mole of liquid ${A}$ and 2 moles of liquid ${B}$ is $500 \mathrm{~mm}$ of $\mathrm{Hg}$. The vapour pressure of the solution increases by $25 \mathrm{~mm}$ of $\mathrm{Hg}$ if one more mole of ${B}$ is added to the above ideal solution at $300 \mathrm{~K}$. The vapour pressure of $A$ in pure state is (in $\mathrm{mm}$ of $\mathrm{Hg}$ ) :-

Assertion: On mixing aniline and Acetone shows +ve deviation.

Reason: Interaction between Acetone and aniline is weaker than interaction of AcetoneAcetone and aniline-aniline.

Mole fraction of solute in an aqueous solution which boils at 100.104. ${K_b}\;for\;{\mathrm{H}_2}\mathrm{O} = 0.52\;K\;\mathrm{molalit}{\mathrm{y}^{ - 1}}$:

Assertion: At high altitude cooking food is difficult.

Reason: Water boils at high temperature.

How many grams of cane sugar are present in $534.2 \mathrm{~g}$ of its aqueous solution having molality 0.2?

For each of the following dilute solutions, van't Hoff factor is equal of 3, except:

A liquid freezes at $7^{\circ} \mathrm{C}$ and boils at $77^{\circ} \mathrm{C}.$ If the $K_{\mathrm{f}}$ and $K_{\mathrm{b}}$ values for the liquid are $5.6$ and $2.5 \, \mathrm{deg} / \mathrm{molal},$ respectively, then the ratio of molar latent heat of fusion to molar latent heat of vaporization is

The pressure under which liquid and its vapour can coexist in equilibrium is known as:

In an osmotic pressure measurement experiment, a $5\%$ solution of compound ‘X’ is found to be isotonic with a $2\%$ acetic acid solution . The gram molecular mass of ‘X’ is

The Van't Hoff factor will be highest for

For a binary ideal liquid solution, the total pressure of the solution is given as:

Assertion: Van't Hoff factor is always more or equal to one.

Reason: Van't Hoff factor is the ratio of experimental colligative properties to observed colligative properties.

A 5% solution of cane sugar (Molar mass 342) is isotonic with 1% of a solution of an unknown solute. The molar mass of unknown solute is