The cotterells precipitator is used to :

(a) neutralize charge on carbon particles in air in smoke

(b) coagulate carbon atoms of smoke

(c) bring in cataphoresis in carbon particles

(d) all of the above

Subtopic:  Adsorption and Absorption | Colloidal Solution |
 83%
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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 |
 77%
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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 |
 94%
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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 |
 80%
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 |
 84%
From NCERT
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Gold number is the index for:

(a)protective power of lyophilic colloid

(b)purity of gold

(c)metallic gold

(d)electroplated gold

Subtopic:  Colloidal Solution | Lyophilic & Lyophobic Sol |
 94%
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Which is an emulsion?

(1) Boot polish                             

(2) Lipstic

(3) Shampoo                               

(4) All of these

Subtopic:  Emulsions |
 77%
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Milk contains a protein that is very good for health. The protein is:

(a) caffeine

(b) calciferol

(c) keratin

(d) casein

Subtopic:  Colloidal Solution | Lyophilic & Lyophobic Sol |
 92%
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The charge on As2S3 sol is due to the adsorption of:

(1) H+                             

(2) OH-

(3) O2-                             

(4) S2-

Subtopic:  Colloidal Solution |
 83%
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Which acts as poison for Pd-charcoal in lindlar's catalyst ?

(a) BaSO4

(b) Quiniline

(c) Both (a) and (b)

(d) None of these

Subtopic:  Catalyst |
 75%
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