An example of intrinsic colloid is:

1. As₂S₃ sol                         

2. Fe(OH)₃ sol

3. egg albumin                     

4. Au sol

Bleeding is stoped by the application of ferric chloride. This is because :

1. the blood starts flowing in the opposite direction

2. the blood reacts and a solid is formed which seals the blood vessel

3. the blood is coagulated and the blood vessel are sealed

4. the ferric chloride seals the blood vessel

Which is not a colloid?

1. Chlorophyll                                   

2. Egg white

3. Ruby glass                                   

4. Milk

Chemisorption is:

1. multimolecular in nature

2. reversible

3. often highly specific and directional

4. not very specific

Medicines are more effective if they are used in:

1. Colloidal state

2. Solid-state

3. Solution state

4. None of the above 

Which is not shown by sols?

1. Adsorption

2. Tyndall effect

3. Flocculation

4. Paramagnetism

Detergent action of synthetic detergents is due to their:

1. interfacial area

2. high molar mass

3. ionization

4. emulsifying properties

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.

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

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