At the critical micelle concentration (CMC) the surfactant molecule

1. deccompose

2. dissociate

3. associate

4. become completely soluble

Subtopic:  Emulsions |
 76%
From NCERT
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Adsorption of log(x/m) and log P was found of the following type. This is true when:-

1. n = 

2. 1/n = 1

3. P = 0

4. 1/n = 

Subtopic:  Adsorption Isotherm |
 52%
From NCERT
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Which one has the highest coagulation power?

1. K+

2. Ca++

3. Al+++

4. Sn4+

Subtopic:  Colloidal Solution |
 77%
From NCERT
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The charge on As2S3 sol is due to to the adsorbed:-

(1) H+

(2) OH-

(3) O-2

(4) S-2

Subtopic:  Colloidal Solution |
 87%
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In the langmuir adsorption isotherm, the postulates were:-

(A) Adsorption of a gas molecule at a particular site depends on neighboring sites.

(B) Gases undergoes adsorption behave ideally

     (1) Only A is correct

     (2) Only B is correct

     (3) Both are correct

     (4) None of these

Subtopic:  Adsorption Isotherm |
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The most suitable electrolyte for the coagulation of arsenic sulphide will be:-

1. AlCl3

2. BaCl2

3. NaCl

4. KCl

Subtopic:  Colloidal Solution |
 86%
From NCERT
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According to Freundlich adsorption isotherm, which of the following is correct:-

(1) xmα p°

(2) xmα p

(3) xmα p1/n

(4) All are correct for different ranges of pressure

Subtopic:  Adsorption Isotherm |
 75%
From NCERT
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Colloidal solution of gold prepared by different methods of different colours because of:

1. different diameters of colloidal gold particles

2. variable valency of gold

3. different concentration of gold particles

4. impurities produced by different methods

Subtopic:  Colloidal Solution |
 55%
From NCERT
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10 mg starch protected 5 ml gold sol in 1 ml 2 % NaCl solution. The gold number of starch is:

1. 20               

2. 40

3. 80               

4. 100

Subtopic:  Colloidal Solution |
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What is the most effective electrolyte for precipitating Fe(OH)3 sol?

1. NaCl             

2. BaSO4

3. AlCl3           

4. Na3PO4

Subtopic:  Colloidal Solution |
From NCERT
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