Liquid Solution - Physical Chemistry - Chemistry Previous Year Questions

The volume of 10N and 4N HCl required to make 1 litre of 7N HCl are

When KBr is dissolved in water, K\(^+\) ions are

Which of the following is correct mixture of azeotrope?

Under which of the following condition, the gases does not follow Henry's law?

Which of the following is correct order of their increasing boiling points?

Which of the following does not affect solubility of a gas in liquid?

The system that forms maximum boiling azeotropes is

Which among the following forms minimum boiling azeotropes?

(i) Heptane + Octane

(ii) Water + Nitric acid

(iii) Ethanol + Water

(iv) Acetone + Carbon dioxide

The solution which have lowest freezing point is

What would be the van't Hoff factor for a solution prepared by dissolving \(3.42 \mathrm{~g}\) of \(\mathrm{CaCl}_2\) in \(2500 \mathrm{~ml}\) of water having an Osmotic pressure equal to \(0.75 \mathrm{~atm}\). at \(27^{\circ} \mathrm{C}\) ? Molar mass of \(\mathrm{CaCl}_2=111 \mathrm{~amu}\).

If the depression in freezing point of an aqueous solution containing a solute, which is neither dissociated nor associated, is \(\mathbf{a} \mathrm{K}\) with \(\mathrm{K}_{\mathrm{f}}=\mathbf{b ~ K ~ k g ~ m o l}{ }^{-1}\), what would be the elevation in boiling point \((\mathrm{X})\) for this solution if its \(\mathrm{K}_{\mathrm{b}}=\mathbf{\mathrm { ~K } \mathrm { ~K } \mathrm { ~kg } \mathrm { ~mol }}{ }^{-1}\) ?

Choose the incorrect statement:

What is the mole fraction of solute in a \(5 \mathrm{~m}\) aqueous solution?

\(\mathrm{X}\) is an electrolyte with a concentration of \(0.04 \mathrm{M}\) whose formula is of the type \(\mathrm{X}_2 \mathrm{~A}\). \(\mathrm{Y}\) is a non-electrolyte solution with a concentration of \(0.2 \mathrm{M}\) and has an osmotic pressure equal to \(\mathrm{P}_2\) at room temperature. What is the relationship between the Osmotic pressure \(\pi\) of \(\mathrm{X}\) and \(\mathrm{P}_2\) ?

A solution of \(\mathrm{KCl}(\mathrm{M}=74.5 \mathrm{~g} \mathrm{~mol}^{-1})\) containing \(1.9 \mathrm{~g}\) per \(100 \mathrm{~mL}\) of \(\mathrm{KCl}\) is isotonic with a solution of urea \((\mathrm{M}=60.0 \mathrm{~g} \mathrm{~mol}^{-1}\)) containing \(3 \mathrm{~g}\) per \(100 \mathrm{~mL}\) of urea. The degree of dissociation of \(\mathrm{KCl}\) is: [Assume both the solutions are kept at same temperature]

An aqueous solution of glucose boils at \(100.01^{\circ} \mathrm{C}\). The number of glucose molecules in a solution containing \(100 \mathrm{~g}\) of water is _________ [\(\mathrm{K}_{\mathrm{b}}\) for water is \(0.5 \mathrm{~K} \mathrm{~kg} \mathrm{~mol}^{-1}\)]

The system that forms minimum boiling azeotrope is :

Which among the following compounds has the highest freezing point of its 1 molal aqueous solution?

In the following question a statement of Assertion (A) followed by a statement of Reason (R) is given. Choose the correct option out of the choices given below.

Assertion (A): van't Hoff factor for a solution of benzoic acid in benzene is less than one.

Reason(R): Benzoic acid undergoes dissociation in benzene and its calculated molecular mass using colligative properties is lower than its actual molecular mass.

A solute \(\mathrm{X}\) is found to exist as a dimer in water. A 4 molal solution of \(\mathrm{X}\) shows a boiling point of \(101.04^{\circ} \mathrm{C}\). What is the percentage association of \(\mathrm{X}\) ? (\(\mathrm{K}_{\mathrm{b}}\) for water \(=0.52 \mathrm{~K} / \mathrm{m}\)).