Step 1: Understanding the Concept:
Colloidal chemistry involves various techniques for the preparation, purification, and study of properties of colloidal systems. Each term refers to a specific interaction or process. Step 2: Key Formula or Approach:
Match based on standard definitions:
- Dialysis: Removal of crystalloids from a colloid through a membrane \(\longrightarrow\) Purification.
- Peptization: Conversion of a fresh precipitate into a colloid \(\longrightarrow\) Preparation.
- Emulsification: Dispersion of one liquid in another (aided by soap) \(\longrightarrow\) Cleansing action.
- Electrophoresis: Movement of charged particles in an electric field, leading to discharge and settling \(\longrightarrow\) Coagulation. Step 3: Detailed Explanation:
- i. Dialysis is used to purify sols by removing electrolytes (match d).
- ii. Peptization is a method to prepare stable sols from precipitates (match c).
- iii. Emulsification is the principle behind how soaps remove dirt/grease (match a).
- iv. Electrophoresis causes colloidal particles to clump together (coagulate) at the electrode (match b).
The combination is i-d, ii-c, iii-a, iv-b. Step 4: Final Answer:
This matches option B.
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