Which is the electrolyte that is least effective in causing coagulation of +ve ferric hydroxide sol?

1. KBr

2. K₂SO₄

3. K₂CrO₄

4. K₃[Fe(CN)₆]

What is a solution that isn't a lyophilic colloid?

1. Milk

2. Gum

3. Fog

4. Blood

Brownian movement is caused by:

1. Colloidal solution.

2. True solution.

3. Suspension having size <1000 m$\mathrm{\mu }$.

4. All of the above.

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

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.

How is the flocculation value expressed?

1. Millimole per litre.

2. Mole per litre.

3. Gram per litre.

4. Mole per millilitre.

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.

What does blood contain?

1. Positively charged particles.

2. Negatively charged particles.

3. Neutral particles.

4. Negatively as well as positively charged particles.

Peptization is the process of?

1. Precipitating colloidal particles.

2. Purifying colloidal particles.

3. Dispersing the precipitate into a colloidal state.

4. None of the above.

Given below are three process:

a. Emulsification

b. Adsorption

c. Absorption

The process of froth flotation and chromatography is based on:
1. a & b
2. b & c
3. a & c
4. None of the above