Liquid Solution - Physical Chemistry PYQ

Which condition is not satisfied by an ideal solution?

A solution of urea (molar mass \(60 \mathrm{~g} \mathrm{~mol}^{-1}\) ) boils at \(100.20^{\circ} \mathrm{C}\) at the atmospheric pressure, if \(K_f\) and \(K_b\) for water are 1.86 and \(0.512 \mathrm{~K}\) \(\mathrm{kg} \mathrm{mol}^{-1}\) respectively. The freezing point of the solution will be

When difference in boiling points of two liquids is too small, then the separation is carried out by

Which of the following will form an ideal solution?

The molal elevation constant is the ratio of elevation in boiling point to

If two liquids \(A\) and \(B\) form a minimum boiling azeotrope at some specific composition, then which statement among the following is correct?

The vapour pressure of a solvent decreased by 20 mm of Hg when a non-volatile solute was added to the solvent. The mole fraction of the solute in the solution is 0.5. What should be the mole fraction of the solvent for the decrease in the vapour pressure needs to be 10 mm of Hg?

If the \(K_{\mathrm{H}}\) values for \(\operatorname{Ar}(g), \mathrm{CO}_2(g), \mathrm{HCHO}(g)\) and \(\mathrm{CH}_4(\mathrm{~g})\) respectively are \(40.39,1.67, 1.83 \times 10^{-5}\) and \(0.413\) , then identify the correct increasing order of their solubilities.

If 500 mL of CaCl\(_2\) solution contains 3.01 \(\times\) 10\(^{22}\) chloride ions, molarity of the solution will be

A solution containing 6.0 g of urea is isotonic with a solution containing 10 g of a non-electrolytic solute \(X\). The molar mass of X (in g \(\mathrm{mol}^{-1}\)) is

\(x \%(w / V)\) solution of urea is isotonic with \(4 \%\) \((w / V)\) solution of a non-volatile solute of molar mass \(120 \mathrm{~g} \mathrm{~mol}^{-1}\). The value of \(x\) is

Assertion (A) Blood cells collapse when suspended in saline water.

Reason (R) Cell membrane dissolves in saline water.

At \(T(\mathrm{~K}) \times \mathrm{g}\) of a non-volatile solid (molar mass \(78 \mathrm{~g} \mathrm{~mol}^{-1}\)) when added to 0.5 kg water, lowered its freezing point by \(1.0^{\circ} \mathrm{C}\). What is \(x\) (in g)? (\(K_f\) of water at \(T(\mathrm{~K})=1.86 \mathrm{~K} \mathrm{~kg} \mathrm{~mol}^{-1}\))

0.05 mole of a non-volatile solute is dissolved in 500 g of water. What is the depression in freezing point of resultant solution?

$$\left(K_f\left(\mathrm{H}_2 \mathrm{O}\right)=1.86 \mathrm{~K} \mathrm{~kg} \mathrm{~mol}^{-1}\right)$$

Which of the following form an ideal solution?

I. Chloroethane and bromoethane

II. Benzene and toluene

III. \(n\)-hexane and \(n\)-heptane

IV. Phenol and aniline

A non- volatile solute is dissolved in water. The $\Delta T_{\mathrm{b}}$ of resultant solution is 0.052 K . What is the freezing point of the solution ( in K )?

( $K_b$ of water $=0.52 \mathrm{~K} \mathrm{kgmol}^{-1}$,

$K_f$ of water $=1.86 \mathrm{~K} \mathrm{kgmol}^{-1}$,

freezing point of water $=273 \mathrm{~K}$ )

The osmotic pressure of sea water is 1.05 atm . Four experiments were carried as shown in table. In which of the following experiments, pure water can be obtained in part-II of vessel.