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%
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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%
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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%
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Which is an emulsifier?

1. Soap

2. Oil

3. NaCl

4. Water

Subtopic:  Emulsions |
 69%
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KClO3 on heating decomposes into KCl and O2. If some MnO2 is added, the reaction goes much faster because:

1. MnO2 decomposes to give oxygen.

2. MnO2 provides  heat by reacting.

3. Better contact is provided by MnO2

4. MnO2 acts as a catalyst.

Subtopic:  Catalyst |
 84%
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The capacity of an ion to coagulate a colloidal solution depends on:

1. its shape

2. amount of its charge

3. the sign of charge

4. both amount and sign of the charge

Subtopic:  Colloidal Solution |
 82%
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The blue colour of the water of the sea is due to :

1. refraction of the blue light by the imputities in sea water

2. reflection of blue light by sea water

3. scattering of blue light by sol particles

4. absorption of other colours except the blue colour by water molecules

Subtopic:  Colloidal Solution |
 74%
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What does blood contain?

1. Positively charged particles.

2. Negatively charged particles.

3. Neutral particles.

4. Negatively as well as positively charged particles.

Subtopic:  Colloidal Solution |
From NCERT
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Lyophobic colloids are:

1. Reversible colloids

2. Irreversible colloids

3. Protective colloids

4. Gum, and proteins

Subtopic:  Lyophilic & Lyophobic Sol |
 78%
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