Which of the following statement about multi-molecular colloid is incorrect?
1. | They have a diameter of less than 1 nm. |
2. | When these particles are dissolved in a liquid, they form sol. |
3. | The molecules in the aggregate are held together by van der Waal’s forces of attraction. |
4. | None of the above. |
The phenomenon of the scattering of light by a colloidal solution known as:
1. Zeeman effect.
2. Tyndall effect.
3. Electrophoresis.
4. None of the above.
Colloids can be classified on the basis of:
1. | Physical states of components. |
2. | Nature of dispersed phase. |
3. | Interaction between the dispersed phase and dispersion medium. |
4. | All of the above. |
The correct match amongst the following is -
Physical states of the dispersed phase and dispersion medium | Type of colloid |
a. D.P = solid; D.M = liquid | i. Foam |
b. D.P = solid; D.M = gas | ii. Emulsion |
c. D.P = liquid; D.M = liquid | iii. Aerosol |
d. D.P = gas; D.M = liquid | iv. Sol |
(D.P = dispersed phase, and D.M = dispersion medium)
Options:
a | b | c | d | |
1. | iv | iii | ii | i |
2. | iii | iv | ii | i |
3. | iv | ii | iii | i |
4. | i | iii | ii | iv |