Colloids
Kerala Board · Class 12 · Chemistry
Complete topic list for Colloids in Kerala Board Class 12 Chemistry. Key concepts, sub-topics, and what to focus on for board exams.
Topics in Colloids
Introduction and Classification of Matter
- Based on particle size: True solution (<1 nm), Colloids (1-100 nm), Suspensions (>100 nm)
- True solutions are homogeneous, colloids appear homogeneous but are actually heterogeneous
- Colloids do not settle under gravity but can be separated by centrifugation
Types of Colloidal Systems
- 8 types based on states of dispersed phase and dispersion medium
- Sol: Solid dispersed in liquid (paint, muddy water)
- Gel: Liquid dispersed in solid (jelly, cheese)
Classification Based on Interaction
- Lyophilic colloids: Strong affinity between phases (reversible, stable)
- Lyophobic colloids: No affinity between phases (irreversible, less stable)
- Lyophilic examples: starch, gelatin, gum, proteins
Classification Based on Molecular Size
- Macromolecular colloids: Large molecules naturally in colloidal range
- Multimolecular colloids: Small molecules aggregating to colloidal size
- Associated colloids (Micelles): Form colloids at higher concentrations
Key Concepts
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What are the important topics in Colloids for Kerala Board Class 12 Chemistry?
Colloids covers several key topics that are frequently asked in Kerala Board Class 12 board exams. Focus on the core concepts listed on this page and practise related questions to build confidence.
How to score full marks in Colloids — Kerala Board Class 12 Chemistry?
Start by understanding all key concepts. Practise previous year questions from this chapter. Revise formulas and definitions regularly. Use flashcards for quick revision before the exam.
Sources & Official References
- Kerala Board of Public Examinations — keralapareekshabhavan.in
- National Education Policy 2020 — education.gov.in
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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