Compound PdCl4.6H2O is a hydrated complex, 1 molal aqueous solution of it has freezing point 269.28K. Assuming 100% ionization of complex, calculate the molecular formula of the complex

(Kt for water = 1.86 K kg mole-1)

1. [Pd(H2O)6]Cl4

2. [Pd(H2O)4Cl2]Cl2.2H2O

3. [Pd(H2O)3Cl3]Cl.3H2O

4. [Pd(H2O)Cl4]4H2O

Concept Questions :-

Depression of Freezing Point
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K4[Fe(CN)6] is 60% ionised. Then the value of Van't Hoff factor is

1. 1.6

2. 2.4

3. 3

4. 3.4

Concept Questions :-

Van’t Hoff Factor
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If molality of the dilute solution is doubled, the value of molal depression constant (Kf) will be?

(a) doubled
(b) halved
(c) tripled
(d) unchanged

Concept Questions :-

Depression of Freezing Point
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Which of the following is dependent on temperature?

(a) Molality
(b) Molarity
(c) Mole fraction
(d) Weight percentage

Concept Questions :-

Concentration Term and Numericals
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The van't Hoff factor [i] for a dilute aqueous solution of the strong electrolyte barium hydroxide is?

(a) 0
(b) 1
(c) 2
(d) 3

Concept Questions :-

Van’t Hoff Factor
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Which one of the following is incorrect for ideal solution ?

(a) Hmix=0

(b) Umix=0

(c) P=Pobs-Pcalculated by Raoul's law = 0

(d) Gmix=0

Concept Questions :-

Introduction/ Colligative properties
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At 100°C 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

(a) 100°C

(b) 102°C

(c) 103°C

(d) 101°C

Concept Questions :-

Elevation of Boiling Point
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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 25°C.

(Given, vapour pressure data at 25°C, benzene = 12.8 kPa, toluene = 3.85 kPa)

(a) The vapour will contain a higher percentage of toluene

(b) The vapour will contain equal amounts of benzene and toluene

(c) Not enough information is given to make a prediction

(d) The vapour will contain a higher percentage of benzene

Concept Questions :-

Relative Lowering of Vapour Pressure/ Vapour Pressure
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Which one is not equal to zero for an ideal solution?
(a)ΔHmix 
(b)ΔSmix
(c)ΔVmix
(d)ΔP=PObserved-PRaoult

Concept Questions :-

Introduction/ Colligative properties
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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?

(a) X is undergoing dissociation in water

(b) Molecular mass of X is greater than the molecular mass of Y

(c) Molecular mass of X is less than the molecular mass of Y

(d) Y is undergoing dissociation in water while X undergoes no change

Concept Questions :-

Elevation of Boiling Point
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