The cotterells precipitator is used to :

1. neutralize charge on carbon particles in air in smoke

2. coagulate carbon atoms of smoke

3. bring in cataphoresis in carbon particles

4. all of the above

Subtopic:  Adsorption and Absorption | Colloidal Solution |
 75%
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Foam is a colloidal solution of:

1. Gaseous particles dispersed in gas               

2. Gaseous particles dispersed in a liquid           

3. Solid particles dispersed in a liquid

4. Solid particles dispersed in gas

Subtopic:  Colloidal Solution |
 69%
From NCERT
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A liquid aerosol is a colloidal system of:

1. a liquid dispersed in a solid

2. a liquid dispersed in a gas

3. a gas dispersed in a liquid

4. a solid dispersed in a gas

Subtopic:  Colloidal Solution |
 71%
From NCERT
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A negative catalyst or inhibitor is one:

1. which retards the rate of reaction

2. takes the reaction in forward direction

3. promotes the side reaction

4. None of the above

Subtopic:  Catalyst |
 90%
From NCERT
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Alum helps in purifying water by:

1. Forming Si complex with clay particles.

2. Sulphate part which combines with the dirt and removes it.

3. Aluminium which coagulates the mud particles.

4. Making mud water soluble.

Subtopic:  Colloidal Solution |
 64%
From NCERT
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Which of the following does not form anionic micelle?

1. C12H25COONa                   

2. C12H25SO4Na

3. C12H25SO3Na                     

4. C12H25(NH3)3Cl

Subtopic:  Emulsions |
 75%
From NCERT
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Milk can be preserved by adding a few drops of?

1. Formic acid solution             

2. Formaldehyde solution

3. Acetic acid solution             

4. Acetaldehyde solution

Subtopic:  Emulsions |
 57%
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When a catalyst is added to a system the:

1. equilibrium concentrations are increased

2. equilibrium concentrations are unchanged

3. the rate of forward reaction is increased and that of backward reaction is decreases

4. value of the equilibrium constant is decreased

Subtopic:  Catalyst |
 60%
From NCERT
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Clouds, mist, fog and aerosols are colloidal solution of:

1. solid in a gas

2. gas in a solid

3. liquid in a gas

4. gas in a liquid

Subtopic:  Colloidal Solution |
 77%
From NCERT
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The index for the Gold number is:

1. Protective power of lyophilic colloid.

2. Purity of gold.

3. Metallic gold.

4. Electroplated gold.

Subtopic:  Colloidal Solution | Lyophilic & Lyophobic Sol |
 88%
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