Van't Hoff Factor

Q.

Which of the following compounds corresponds Vant Hoff factor to be equal to 2 for dilute solution:

1. 

2. 

3. 

4. Sugar

Q.

The Van't Hoff factor will be highest for

1. Sodium phosphate

2. Urea

3. Sodium chloride

4. Magnesium chloride

Q.

The Van't Hoff factor i for a 0.2 molal aqueous solution of urea is:

1. 0.2

2. 0.1

3. 1.2

4. 1.0

Q.

One mole of a solute A is dissolved in a given volume of a solvent. If solute undergoes association, it's Van't Hoff factor i is expressed as:

1. 

2. 

3. 

4. 

Q.

A solution containing 30 gms of non-volatile solute in exactly 90 gm water has a vapour pressure of 21.85 mm Hg at 25⁰C. Further 18 gms of water is then added to the solution. The resulting solution has a vapour pressure of 22.15 mm Hg at 25⁰C. Calculate the molecular weight of the solute.

1. 74.2

2. 75.6

3. 67.83

4. 78.7

Q.

Which of the following salt has the same value of vant Hoff factor i as that of $K_4\left[Fe\right(CN{)}_6]$

1. 
   

2. 
   

3. 
   

4. 
   

Q.

Considering complete ionization, Van't Hoff factor of Ca(NO₃)₂ is:

1. 2

2. 1

3. 3

4. 4

Q.

The experimental molecular weight of an electrolyte will always be less than its calculated value because the value of Van't Hoff factor "i” is

1. Less than 1

2. Greater than 1

3. Equivalent to one

4. Zero

Q.

On adding solute to a pure solvent, having vapour pressure 0.80 atm, vapour pressure reduces to 0.60 atm. Mole fraction of solute is

1. 0.25

2. 0.75

3. 0.33

4. 0.50

Q.

The Van't Hoff factor calculated from association data is always ________ than calculated from dissociation data.

1. Less

2. More

3. More or less

4. Same