NEET Chemistry Surface Chemistry Questions Solved

BOARD

Define the following terms with an example in each case:

(i) Macromolecular sol

(ii) Peptization 

(iii) Emulsion

(i) Macromolecular sol:

1. They are molecules of large size

Example: polymers like rubber, nylon, starch protiens etc.

2. They have high molecular masses.

3. Due to long chain, the van der Waals' forces holding them are comparatively 

stronger.

(ii) Peptization: It is process of converting a fresh precipitate into colloidal 

particles by shaking it with the dispersion medium in the presence of a 

small amount of a suitable electrolyte.

(iii) Emulsions: The colloidal solution in which both dispersed phase and dispersion

medium are in liquid state.

Example: Milk, cream.

Difficulty Level:

  • 85%
  • 8%