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

(1) doubled

(2) halved

(3) tripled

(4) unchanged

Subtopic:  Depression of Freezing Point |
 61%
From NCERT
NEET - 2017
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The temperature dependent term among the following is -

1. Molality 2. Molarity
3. Mole fraction 4. Weight percentage
Subtopic:  Concentration Terms & Henry's Law |
 83%
From NCERT
NEET - 2017
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The van't Hoff factor [i] for a dilute aqueous solution of the strong electrolyte barium hydroxide is?

(1) 0

(2) 1

(3) 2

(4) 3

Subtopic:  Van’t Hoff Factor |
 61%
From NCERT
NEET - 2016
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Which one of the following is incorrect for ideal solution ?

(1) Hmix=0

(2) Umix=0

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

(4) Gmix=0

Subtopic:  Introduction & Colligative properties |
 70%
From NCERT
NEET - 2016
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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

(1) 100°C

(2) 102°C

(3) 103°C

(4) 101°C

Subtopic:  Relative Lowering of Vapour Pressure | Elevation of Boiling Point |
 51%
From NCERT
NEET - 2016
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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)

1. The vapour will contain a higher percentage of toluene

2. The vapour will contain equal amounts of benzene and toluene

3. Not enough information is given to make a prediction

4. The vapour will contain a higher percentage of benzene

Subtopic:  Relative Lowering of Vapour Pressure |
 54%
From NCERT
NEET - 2016
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Which one is not equal to zero for an ideal solution?

1. ΔHmix 

2. ΔSmix

3. ΔVmix

4. ΔP=PObserved-PRaoult

Subtopic:  Introduction & Colligative properties |
 80%
From NCERT
NEET - 2015
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Which one of the following elctrolytes has the same value of van't Hoff's factor(i) as

that of Al2(SO4)(if all are 100% ionised)? 

1. K2SO4

2. K3[Fe(CN)6]

3. Al(NO3)3

4. K4[Fe(CN)6]

Subtopic:  Introduction & Colligative properties | Van’t Hoff Factor |
 76%
From NCERT
NEET - 2015
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Of the following 0.10 m  aqueous solutions, which one will exhibit the largest freezing

point depression?

1. KCl

2. C6H12O6

3. Al2(SO4)3

4. K2SO4

Subtopic:  Depression of Freezing Point |
 71%
From NCERT
NEET - 2014
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pA and pare the vapour pressure of pure liquid components, A and B, respectively of an

ideal binary solution.If x, represents the mole fraction of component A, the total pressure

of the solution will be.

1. pA + xA(pB-pA)

2. pA + xA(pA-pB)

3. pB + xA(pB-pA)

4. pB + xA(pA-pB)

Subtopic:  Dalton’s Law of Partial Pressure |
 57%
From NCERT
NEET - 2012
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