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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The freezing point depression constant format is -1.86°C m-1. If 5.00g Na2SO4 dissolved

in 45.0 g H2O, the freezing point is changed by -3.82°C. Calculate the van't Hoff factor

for NaSO4

1. 2.63

2. 3.11

3. 0.381

4. 2.05

Subtopic:  Depression of Freezing Point |
 61%
From NCERT
NEET - 2011
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The van't Hoff factor, i for a compound which undergoes dissociation in one solvent and

association in other solvent is respectively.

1. less than one and less than one

2. greater than one and less than one

3. greater than one and greater than one

4. less than one and greater than one

Subtopic:  Van’t Hoff Factor |
 81%
From NCERT
NEET - 2011
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An aqueous solution is 1.00 molal in KI. Which change will cause the vapour pressure of

the solution to increase ?

1. Addition of NaCl

2. Addition of Na2SO4

3. Addition of 1.00 molal KI

4. Addition of water

Subtopic:  Relative Lowering of Vapour Pressure |
 55%
From NCERT
NEET - 2010
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A solution of sucrose (molar mass = 342 g mol-1) 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)

1. -0.372 °C

2. 0.372 °C

3. 0.572 °C

4. -0.572 °C

Subtopic:  Depression of Freezing Point |
 71%
From NCERT
NEET - 2010
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Links
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A 0.0020 m aqueous solution of an ionic compound Co(NH3)5(NO2)Cl freezes at -0.00732°C. Number of moles of ions which 1 mol of ionic compound produces on being dissolved in water will be (kf=-1.86°C/ m)

1. 2

2. 3

3. 4

4. 1

 

Subtopic:  Depression of Freezing Point |
 66%
From NCERT
NEET - 2009
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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:

(1) -1.12 K

(2) 0.56 K

(3) 1.12 K

(4) - 0.56 K

Subtopic:  Depression of Freezing Point |
 50%
From NCERT
NEET - 2007
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1.00 g of a non-electrolyte solute (molar mass 250g/mol) 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:-

(1) 0.4 K

(2) 0.3 K

(3) 0.5 K

(4) 0.2 K

Subtopic:  Depression of Freezing Point |
 79%
From NCERT
NEET - 2006
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