Question
- Differentiate between adsorbtion and absorption.
- Out of $MgCl_2$ and $AlCl_3,$ which one is more effective in causing coagulation of negatively charged sol and why?
- Out of sulphur sol and proteins, which one forms multimolecular colloids?
✓
Answer
| Adsorption | Absorption |
| surface phenomena | Bulk phenomena |
| The accumulation of molecular species at the surface rather than in the bulk of a solid or liquid is termed adsorption | The substance is uniformly distributed throughout the bulk of the solid essentially a bulk phenomenon. |
- $AlCl_{3},$ more positive charge/Hardy-Schulze rule.
- Sulphur.
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