Solutions

Arrange the following compounds in increasing order of their solubilities in chloroform
\(\mathrm{NaCl},{\mathrm{CH}}_{3}\mathrm{OH}\), cyclohexane, \({\mathrm{CH}}_{3}\mathrm{CN}\)

[Re-NEET 2024]

Consider the following statements about the solutions formed by mixing two liquids.
A. An ideal solution thus formed obeys Raoult’s law throughout the composition range.
B. Mixture of chloroform and acetone shows negative deviation from Raoult’s law.
C. Mixture of aniline and phenol shows positive deviation from Raoult’s law.

[Re-NEET 2026]

The energy of an electron in the ground state (n = 1) for \({\mathrm{He}}^{+}\) ion is \(-\mathrm{x}\) Joules then that for an electron in n = 2 state for \({\mathrm{Be}}^{3+}\)ion in Joule is:

The amount of glucose required to prepare \(250\mathrm{mL}\) of \(\frac{M}{20}\) aqueous solution is:
(Molar mass of glucose : \(180\mathrm{g}{\mathrm{mol}}^{-1}\))

The plot of osmotic pressure \(\pi\) vs concentration \(\left(mol{L}^{-1}\right)\) for a solution gives a straight line with slope \(25.73Lbarmo{l}^{-1}\). The temperature at which the osmotic pressure measurement is done is:

(Use \(R=0.083Lbarmo{l}^{-1}{K}^{-1}\) )

[NEET 2024]

Mass of glucose \(\left( C _6 H _{12} O _6\right)\) required to be dissolved to prepare one litre of its solution which is isotonic with \(15 gL ^{-1}\) solution of urea \(\left( NH _2 CONH _2\right)\) is

(Given: Molar mass in \(g mol ^{-1} C : 12, H : 1, O : 16, N : 14\) )

[Re-NEET 2024]

The plot of osmotic pressure \(\pi\) vs concentration \(\left(mol{L}^{-1}\right)\) for a solution gives a straight line with slope \(25.73Lbarmo{l}^{-1}\). The temperature at which the osmotic pressure measurement is done is: (Use \(R=0.083Lbarmo{l}^{-1}{K}^{-1}\) )

[NEET 2024]

The Henry's law constant \(\left({\mathrm{K}}_{\mathrm{H}}\right)\) values of three gases (A, B, C) in water are \(145,2\times {10}^{-5}\) and \(35\mathrm{kbar}\), respectively. The solubility of these gases in water follow the order

The amount of glucose required to prepare \(250\mathrm{mL}\) of \(\frac{M}{20}\) aqueous solution is:
(Molar mass of glucose : \(180\mathrm{g}{\mathrm{mol}}^{-1}\))

Given below are two statements
Statement (I) : Molal depression constant \({\mathrm{K}}_{\mathrm{f}}\) is given by \(\frac{{M}_{1}R{T}_{f}^{2}}{\Delta {S}_{\text{fus }}}\), where symbols have their usual meaning.
Statement (II) : \({\mathrm{K}}_{\mathrm{f}}\) for benzene is less than the \({\mathrm{K}}_{\mathrm{f}}\) for water.
In the light of the above statements, choose the most appropriate answer from the options given below

Lead storage battery contains \(38 \%\) by weight solution of \(H _2 SO _4\). The van't Hoff factor is 2.67 at this concentration. The temperature in Kelvin at which the solution in the battery will freeze is
Given \(K _{ f }=1.8 ~K kg mol ^{-1}\)

What weight of glucose must be dissolved in \(100 g\) of water to lower the vapour pressure by \(0.20 ~mm Hg\) ?
(Assume dilute solution is being formed)
Given: Vapour pressure of pure water is \(54.2 ~mm Hg\) at room temperature. Molar mass of glucose is \(180 ~g mol ^{-1}\).

[JEE Main 2023, 11 Apr (Shift 2)]

The mixture which shows positive deviation from Raoult's law is

[NEET 2020]

The correct option for the value of vapour pressure of a solution at \( 45^{\circ} \mathrm{C} \) with benzene to octane in molar ratio \( 3: 2 \) is

[At \( 45^{\circ} \mathrm{C} \) vapour pressure of benzene is \( 280 \mathrm{~mm} \mathrm{Hg} \) and that of octane is \( 420 \mathrm{~mm} \mathrm{Hg} \). Assume Ideal gas]

[NEET 2021]

Isotonic solutions have same

[Re-NEET 2020]