What does the name "aquadag" refer to?

1. Cu in water sol.

2. Pt in water sol.

3. Graphite in water sol.

4. None of the above.

Subtopic:  Colloidal Solution |
 60%
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What results are obtained from adding FeCl3 to K4[Fe(CN)6] in a diluted, cold solution?

1. Prussian blue sol.                     

2. Fe4[Fe(CN)6]3 sol.

3. Positive sol.                               

4. All of the above.

Subtopic:  Colloidal Solution |
 76%
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Which of the following electrolytes, Na2SO4, CaCl2, Al2(SO4)3, and NH4Cl, is the most effective coagulating agent for Sb2S3 sol?

1. Na2SO4                             

2. CaCl2

3. Al2(SO4)3                           

4. NH4Cl

Subtopic:  Colloidal Solution |
 86%
From NCERT
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Among the given options, which element is the minimum required for precipitation of a negatively charged suspension of clay in water?

1. Aluminium chloride.

2. Potassium sulphate.

3. Sodium hydroxide.

4. Hydrochloric acid.

Subtopic:  Colloidal Solution |
 67%
From NCERT
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The arsenious sulphide sol has negative charge. The maximum coagulationg power for precipitating it is of :

1. 0.1 N Zn(NO3)2

2. 0.1 N Na3PO4

3. 0.1 N ZnSO2

4. 0.1 N AlCl3

Subtopic:  Colloidal Solution |
 69%
From NCERT
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An emulsifier is a substance that:

1. Homogenesis the emulsion

2. Stabilizes the emulsion

3. Retards the dispersion of liquid in the liquid

4. Coagulates the emulsion

Subtopic:  Emulsions |
 75%
From NCERT
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What is a colloidal solution that is commonly used to treat skin diseases?

1. Colloidal sulphur.                   

2. Colloidal silver.

3. Colloidal gold.                         

4. Colloidal antimony.

Subtopic:  Colloidal Solution |
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Adsorption is accompanied by:

1. decrease in entropy of the system

2. decrease in enthalpy of the system

3. TS for the process is negative

4. all of the above

Subtopic:  Adsorption and Absorption |
 90%
From NCERT
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How is the flocculation value expressed?

1. Millimole per litre.

2. Mole per litre.

3. Gram per litre.

4. Mole per millilitre.

Subtopic:  Colloidal Solution |
 83%
From NCERT
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A liquid which makes scatters a beam of light (visible in a dark room) but leaves no residue when passed through a filter paper is best described as:

1. A suspension

2. Sol

3. True solution

4. None of the above

Subtopic:  Colloidal Solution |
 56%
From NCERT
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