Van't Hoff factor is 

(1) More than one in case of association 

(2) Less than one in case of dissociation 

(3) Equal to normal molecular massobserved molecular mass

(4) Equal to observed molecular massnormal molecular mass

Subtopic:  Van’t Hoff Factor |
 60%
From NCERT
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The solubility of a gas in a liquid increase with 

(1) Increase of temperature

(2) Amount of liquid taken

(3) Decrease in temperature

(4) Reduction of gas pressure

Subtopic:  Concentration Terms & Henry's Law |
 70%
From NCERT
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Which of the following solution would exhibit abnormal colligative properties?

(1) 1 M glucose

(2) 0.1 M NaCl

(3) 0.1 M sucrose 

(4) 10 gram glass powder in water 

Subtopic:  Van’t Hoff Factor |
 68%
From NCERT
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The number of moles of sodium hydroxide present in 2.5 L and 0.5 M aqueous solution will be

(1) 1.25

(2) 0.5

(3) 12.5

(4) 5

Subtopic:  Concentration Terms & Henry's Law |
 86%
From NCERT
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Maximum freezing point will be for 1 molal solution of assuming equal ionization in each case:

(1) [Fe(H2O)6]Cl3

(2) [Fe(H2O)5Cl] Cl2.H2O

(3) [Fe(H2O)4Cl2]Cl.2H2O

(4) [Fe(H2O)3Cl3].3H2O

Subtopic:  Van’t Hoff Factor |
 59%
From NCERT
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The solution which has the lowest freezing point is 

(1) 0.1 M potassium nitrate

(2) 0.1 M aluminium sulphate

(3) 0.1 M potassium chloride

(4) 0.1 M potassium sulphate

Subtopic:  Van’t Hoff Factor |
 73%
From NCERT
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The vant Hoff factor 'i' accounts for

1. the extent of dissociation of solute

2. the extent of dissolution of solute

3. the degree of decomposition of solution

4. degree of solubilization of solute

Subtopic:  Van’t Hoff Factor |
 74%
From NCERT
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The azeotropic mixture of water and ethanol boils at 78.15 oC. When this mixture is distilled, it is possible to obtain-

1. Pure H2O

2. Pure C2H5OH

3. Pure H2O as well as pure C2HOH

4. Neither H2O nor C2H5OH in their pure state 

Subtopic:  Azeotrope |
 66%
From NCERT
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Which of the following changes with a change in temperature?

(1) Mole fraction

(2) Formality

(3) %(W/W)

(4) Molality

Subtopic:  Concentration Terms & Henry's Law |
 75%
From NCERT
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When the solute is present in trace quantities the following expression is used

1. Gram per million

2. Nanogram percent

3. Microgram percent

4. parts per million

Subtopic:  Concentration Terms & Henry's Law |
 90%
From NCERT
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