Physical · Colloids & Surfaces
Colloids & Surface Chemistry
Exam-focused revision notes on Colloids & Surface Chemistry for CSIR-NET Chemical Sciences, GATE Chemistry and IIT-JAM — the core concepts, the formulas worth memorising, the traps that cost marks, and a quick-recall table.
The core idea
A colloid is a two-phase system with a dispersed phase of roughly 1–1000 nm in a dispersion medium. That size window sits between a true solution and a suspension, and it is what gives colloids their characteristic properties.
What this note covers
- 1The core idea
- 2Classification by physical state
- 3Classification by affinity for the medium
- 4Preparation (brief)
- 5Key properties
- 6Stability of lyophobic sols
- 7Hardy–Schulze rule
- 8Protection & gold number
- 9Emulsions
- 10Micelles & surfactants
- 11Applications (quick list)
- 12Common traps students miss
- 13Colloid types — quick table
Read the full note
The remaining 12 sections — including the worked examples, the common-traps list and the quick-recall table — are part of ChemVidya Full Access, along with 6,000+ practice questions.
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