Solutions MCQ Practice Test – NEET Chemistry (Free)

The number of colligative properties is

3
4
5
2

The freezing point of a 0.05 molal aqueous solution of a non-electrolyte is (K_f = 1.86 K kg mol⁻¹)

-0.009 °C
0.093 °C
-0.093 °C
-0.930 °C

The freezing point depression of a 0.001 m aqueous solution of K_x[Fe(CN)₆] (complete dissociation into x K⁺ ions and one complex ion) is 7.44 × 10⁻³ K. The value of x is (K_f = 1.86 K kg mol⁻¹)

4
5
2
3

Reverse osmosis takes place when a pressure

is applied on the pure solvent side
smaller than the osmotic pressure is applied
larger than the osmotic pressure is applied on the solution side
equal to atmospheric pressure is applied

The principle "like dissolves like" means that

ionic solutes dissolve in non-polar solvents
polar solutes dissolve in polar solvents and non-polar solutes in non-polar solvents
non-polar solutes dissolve only in polar solvents
all solutes dissolve in water

Which of the following aqueous solutions will exhibit the highest boiling point?

0.015 M C₆H₁₂O₆
0.01 M KNO₃
0.01 M Na₂SO₄
0.01 M urea

A 0.9% (mass/volume) NaCl solution and a 5% (mass/volume) glucose solution are both nearly isotonic with blood. This is because

glucose dissociates like NaCl
both contain the same mass of solute
their total particle concentrations are nearly equal (about 0.3 mol L⁻¹)
NaCl does not dissociate

A liquid mixture of composition x_A = 0.3 forms a minimum boiling azeotrope at x_A = 0.6. On fractional distillation of the mixture with x_A = 0.3,

the mixture cannot be distilled at all
pure A distils first
pure B distils first and the azeotrope remains
the azeotrope distils first and pure B is left as the residue

Parts per million (ppm) is a convenient unit for expressing the concentration of

a solute present in trace quantities
the solvent in a solution
a concentrated acid
a pure liquid

The Henry's law constant for CO₂ in water is 1.67 × 10⁸ Pa at 298 K. The mole fraction of CO₂ in water when its partial pressure is 2.5 atm (1 atm = 1.013 × 10⁵ Pa) is (in units of 10⁻³)

1.516
15.200
0.152
0.659

Assertion: Acetone and chloroform form a solution showing negative deviation from Raoult's law.
Reason: The solution formed has a vapour pressure higher than that predicted by Raoult's law.

Both Assertion and Reason are true and Reason is the correct explanation of Assertion
Both Assertion and Reason are true but Reason is not the correct explanation of Assertion
Assertion is true but Reason is false
Both Assertion and Reason are false

If 20 g of a solute (molar mass 40 g mol⁻¹) is dissolved in 500 g of water, the molality of the solution is

0.0 m
0.5 m
2.0 m
1.0 m

The molarity of pure water (density 1 g mL⁻¹) is

5.56 M
18.00 M
55.56 M
1.00 M

The molarity of 6.3% (mass/volume) HNO₃ (molar mass 63 g mol⁻¹) is

6.3 M
1.0 M
10.0 M
0.1 M

The boiling point of benzene is 353.23 K. When 1.80 g of a non-volatile solute is dissolved in 90 g of benzene, the boiling point rises to 354.11 K. If K_b of benzene is 2.53 K kg mol⁻¹, the molar mass of the solute is

5.7 g mol⁻¹
57.5 g mol⁻¹
115.0 g mol⁻¹
28.7 g mol⁻¹

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