Solutions

Assertion A: For an ideal solution formed by mixing liquids $\mathbf{P}$ and $\mathbf{Q}, \Delta_{\text {mix }} H=0$ and $\Delta_{\text {mix }} V=0$
Reason R: No interactions occur between P and Q
In the light of the above statements, choos...

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 Rao...

Mixture of chloroform and acetone forms a solution with negative deviation from Raoult's law due to :

Identify the correct statements :
(A) The molality of 2.5 g of ethanoic acid (Molar mass : $60 \mathrm{~g} \mathrm{~mol}^{-1}$ ) in 75 g of benzene solution is 0.556 m .
(B) The molarity of a solution containing 5 g of NaOH (molar mass : $4...

Match List-I with List-II

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5 moles of liquid X and 10 moles of liquid Y make a solution having a vapour pressure of 70 torr. The vapour pressures of pure $X$ and $Y$ are 63 torr and 78 torr respectively. Which of the following is true regarding the described solution...

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

Mass of glucose \((\mathrm{C}_6 \mathrm{H}_{12} \mathrm{O}_6)\) required to be dissolved to prepare one litre of its solution which is isotonic with \(15 \mathrm{~g} \mathrm{~L}^{-1}\) solution of urea \((\mathrm{NH}_3 \mathrm{CONH}_2)\) is...

The plot of osmotic pressure (П) vs concentration \((\mathrm{mol} \mathrm{~L}^{-1})\) for a solution gives a straight line with slope \(25.73 \mathrm{~L} \mathrm{~bar} \mathrm{~mol}^{-1}\). The temperature at which the osmotic pressure meas...

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

Which amongst the following aqueous solution of electrolytes will have minimum elevation in boiling point? Choose the correct option :-

KH value for some gases at the same temperature 'T' are given :

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The correct option for the value of vapour pressure of a solution at 45\(^\circ\)C with benzene to octane in molar ratio 3 : 2 is :[At 45\(^\circ\)C vapour pressure of benzene is 280 mm Hg and that of octane is 420 mm Hg. Assume Ideal gas]

The following solutions were prepared by dissolving 10 g of glucose (C6H12O6) in 250 ml of water (P1), 10 g of urea (CH4N2O) in 250 ml of water (P2) and 10 g of sucrose (C12H22O11) in 250 ml of water (P3). The right option for the decreasin...

The freezing point depression constant (Kr) of benzene is 5. 12 K kg mol-1. The freezing point depression for the solution of molality 0.078 m containing a non-electrolyte solute in benzene is rounded off upto two decimal places :

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

The mixture that forms maximum boiling
azeotrope is :

For an ideal solution, the correct option is :

If molality of the dilute solution is doubled, the value of molal depression constant (Kf) will be

The van't Hoff factor (i) for a dilute aqueous solution of the strong electrolyte barium hydroxide is

Which one of the following is incorrect for ideal solution?

At 100oC the vapour pressure of a solution of 6.5 g of a solute in 100 g water is 732 mm. If Kb = 0.52, the boiling point of this solution will be

Which of the following statements about the composition of the vapour over an ideal 1 : 1 molar mixture of benzene and toluene is correct? Assume that the temperature is constant at 25oC. (Given, vapour pressure data at 25oC, benzene = 12.8...

Which of them is not equal to zero for an ideal solution?

Which one of the following electrolytes has the same value of van't Hoff factor (i) as that of Al2(SO4)3 (if all are 100% ionised)?

The boiling point of 0.2 mol kg\(-\)1 solution of X in water is greater than equimolal solution of Y in water. Which one of the following statements is true in this case?

Of the following 0.10 m aqueous solutions, which one will exhibit the largest freezing point depression?

Which condition is not satisfied by an ideal solution?

pA and pB are the vapour pressure of pure liquid components, A and B, respectively of an ideal binary solution. If xA represents the mole fraction of component A, the total pressure of the solution will be

Vapour pressure of chloroform (CHCl3) and dichloromethane (CH2Cl2) at 25oC are 200 mm Hg and 41.5 mm Hg respectively. Vapour pressure of the solution obtained by mixing 25.5 g of CHCl3 and 40 g of CH2Cl2 at the same temperature will be
(Mol...

The freezing point depression constant for water is \(-\)1.86o C m\(-\)1. If 5.00 g Na2SO4 is dissolved in 45.0 g H2O, the freezing point is changed by \(-\)3.82oC. Calculate the van't Hoff factor for Na2SO4.

The van't Hoff factor \(i\) for a compound which undergoes dissociation in one solvent and association in other solvent is respectively

A 0.1 molal aqueous solution of a weak acid is 30% ionized. If Kf for water is 1.86oC/m, the freezing point of the solution will be

200 mL of an aqueous solution of a protein contains its 1.26 g. The osmotic pressure of this solution at 300 K is found to be 2.57 \(\times\) 10\(-\)3 bar. The molar mass of protein will be (R = 0.083 L bar mol\(-\)1 K\(-\)1)

An aqueous solution is 1.00 molal in KI. Which change will cause the vapour pressure of the solution to increase?

A solution of sucrose (molar mass = 342 g mol\(-\)) has been prepared by dissolving 68.5 g of sucrose in 1000 g of water. The freezing point of the solution obtained will be (Kf for water = 1.86 K kg mol\(-\)1)

A 0.0020 m aqueous solution of an ionic compound [Co(NH3)5(NO2)]Cl freezes at \(-\) 0.00732oC. Number of moles of ions which 1 mol of ionic compound produces on being dissolved in water will be (Kf = \(-\)1.86oC/m)

0.5 molal aqueous solution of a weak acid (HX) is 20% ionised. If Kf for water is 1.86 K kg mol\(-\)1, the lowering in freezing point of the solution is

During osmosis, flow of water through a semipermeable membrane is

A solution of acetone in ethanol

1.00 g of a non-electrolyte solute (molar mass 250 g mol\(-\)1) was dissolved in 51.2 g of benzene. If the freezing point depression constant, Kf of benzene is 5.12 K kg mol\(-\)1, the freezing point of benzene will be lowered by

A solution containing 10 g per dm3 of urea (molecular mass = 60 g mol\(-\)1) is isotonic with a 5% solution of a nonvolatile solute is

The vapour pressure of two liquids P and Q are 80 and 60 torr, respectively. The total vapour pressure of solution obtained by mixing 3 mole of P and 2 mole of Q would be

A solution has a 1 : 4 mole ratio of pentane to hexane. The vapour pressures of the pure hydrocarbons at 20oC are 440 mm Hg for pentane and 120 mm Hg for hexane. The mole fraction of pentane in the vapour phase would be

A solution of urea (mol. mass 56 g mol\(-\)1) boils at 100.18oC at the atmospheric pressure. If Kf and Kb for water are 1.86 and 0.512 K kg mol\(-\)1 respectively, the above solution will freeze at

A solution containing components A and B folloes Raoult's law

A solution contains non volatile solute of molecular mass M2. Which of the following can be used to calculate the molecular mass of solute in terms of osmotic pressure?

Pure water can be obtained from sea water by

From the colligative properties of solution, which one is the best method for the determination of molecular weight of proteins and polymers?