Revisal Problems For JEE Advanced (Liquid Solutions) - JEE MCQ

What mass of sucrose, C₁₂H₂₂0₁₁, should you dissolve in 100.0 g water to obtain a solution in which mole fraction of C₁₂H₂₂0₁₁ is 0.124?

The freezing point (in °C) of a solution containing 0.1 g of K₃[Fe(CN)₆] in 100 g water in which it is 80% ionised is [K_f (H₂0) = 1.86° mol^-1 kg]

Which represents correct difference?

60 g of urea is dissolved in 1100 g of solution in water. To keep ΔT_f/K_f as 1 mol kg^-1, water separated in the form of ice is 

A solution contains 0.1 mole of acetamide in 1 L of glacial acetic acid. When the solution is cooled, the first crystal that appeared at the freezing point contains the molecule(s) of

Two moles of the complex (Cu(NH₃)₃Ci]Cl are dissolved in 3 moles of H₂0 . Relative decrease in vapour pressure was found to be 0.50. If this solution is treated with aq. AgN0₃ solution, then there is formation of

Total volume of a mixture of 46 g ethanol (C₂H₅OH) and 72 g water (H₂0 ) based on the given figure is

pH of 0.1 M dibasic acid is found to be 3. Hence, its osmotic pressure at temperature T K is

Water is purified by ion-exchange resin (RH₂) in which Ca²⁺ in hard water is replaced by H⁺

RH² + Ca²⁺ ----- >RCa + 2H⁺

Water coming out of ion-exchange has pH2. Hence, hardness in ppm of Ca²⁺ ion is 

A sample of drinking water is contaminated with CHCI₃ to the level of 15 ppm by mass. Thus, mass percentage and molality, respectively are

Based on the given dia gram , which of the fo llow ing statem ents regarding the solu tions of two miscible volatile liquids A and B are correct?

I. Plots AC and BD show that Raoult’s law is obeyed for the solution in which A is solute and B is solvent and as well as for that in which B is solute and A is solvent.

II. Plots CD shows that Dalton’s law of partial pressure is observed for the binary solution of components A and 6.

III. In pure state, vapour pressures of volatile liquid differ by 50 units.

IV. Vapour pressure of a mixture containing 40 mole % of B is about 105 units.

Select the correct answer using the codes given below.

25 mL of an aqueous solu tion of KCI was fo und to require 20 mL of 1.0 M AgN0₃ solution when titrated using K₂Cr0₄ as an indicator. Thus, d epression in freezing point of KCI solution with 100% ionisation will be

[K_f (H₂0 ) = 2.0° mol^-1 kg, molarity = molality] 

A 0.001 molal solution of [Pt(NH₃)₄CI₄] in water had a depression in freezing point of 0.0054°. K_f (H₂0 ) = 1.86° mol^-1 kg (assume 100% ionisation). Thus, com plex is

The complete combustion of 2.40 g of a compound of carbon, hydrogen and oxygen yielded 5.46 g of C0₂ and 2.23 g of H₂0 . When 8.69 g o f the compound was dissolved in 281 g of water, the freezing point depression was found to be 0.97°C. Thus, molecular formula of the organic compound is [K_f (H₂0 ) = 1.86° mol^-1 kg)]

One or More than One Options Correct Type
This section contains 4 multiple type questions. Each question has 4 choices (a), (b), (c) and (d), out of which ONE or MORE THAN ONE are correct.

Q.

You have been provided with 10.00% by mass solution of ethanol in water.

At 15°C, density = 0.9831 g mL^-1 

At 25°C, density = 0.9804 g mL^-1 

Select the correct statement(s).

One molal aqueous glucose solution has density 1 .180 gm L^-1. Also, K_f / K_b = 3 . Thus,

For a mixture of binary c om ponents A and 8 with vapo ur pressures and in pure state, total vapour pressure is

where, X_B is mole fraction of component B in the mixture. From this equation, it is concluded that

If liquids A and B form an ideal solution, then

Comprehension Type
This section contains 3 paragraphs, each describing theory, experiments, data, etc. Two questions related to the paragraph have been given.six question related to paragraphs have been given Each question has only one correct answer out of the given 4 options (a), (b), (c) and (d)

Passage 1

Water boils at 100°C at 1 atm pressure. Latent heat of vaporisation (ΔH ) = 10 kcal mol^-1.

Q.

What is the vapour pressure at 40°C?

Passage l

W ater boils at 100°C at 1 atm pressure. Latent heat of vaporisation (ΔH ) = 10 kcal mol^-1.

Q.

Lowering of vapour pressure of 0.2 molal urea solution at 40°C is

Vapour pressure diagram for real solutions of two liquids A and B that exhibit a negative deviation from Raoult’s law. The vapour pressure of both A and 8 are less than predicted by Raoult’s law. The dashed lines represent the plots for ideal solutions.

Q.

Solution containing components A and 8 shows this type of deviation from ideal behaviour when

Vapour pressure diagram for real solutions of two liquids A and B that exhibit a negative deviation from Raoult’s law. The vapour pressure of both A and 8 are less than predicted by Raoult’s law. The dashed lines represent the plots for ideal solutions.

Q.

This type of deviation is also expected in the following mixture.

Passage III

Vapour pressure of binary solution containing 6 g of non-volatile solute in 180 g water is 20.0 torr at 298 K. If one mole of water is further added, vapour pressure increases by 0.02 torr.

Q.

Molar mass of the solute is

Passage III

Vapour pressure of binary solution containing 6 g of non-volatile solute in 180 g water is 20.0 torr at 298 K. If one mole of water is further added, vapour pressure increases by 0.02 torr

The so-called ozone layer in the earth's stratosphere has an average total pressure of 10 mm with partial pressure of ozone in the layer 1.2 x 10^-5 mm. What is the concentration of ozone (in ppm) assuming that air is a mixture of N₂ and 0₂ is 4 : 1 molar ratio.

The vapour pressure of a solvent is decreased by 10 mm of Hg when a non-volatile solute was added to the solvent. The mole fraction of the solute in the solution is 0.2. How many times the vapour pressure is decreased when mole fraction of solvent is decreased by 25%?

The freezing point depression of a 1.00x 10^-3 molal aqueous solution of K_x[Fe(CN)₆] is 7.1O x 10^-3 K. If K_f (H₂O)= 1.86 K kg mol^-1, what is the value of x?