Chapter 6 of 15
Concept Maps
Surface Chemistry — Concept Maps
Tamil Nadu Board · Class 12 · Chemistry
3 concept maps of Surface Chemistry for Tamil Nadu Board Class 12 Chemistry, each also written out as a text outline.
44 questions40 flashcards5 concepts
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3 Concept Maps
Surface Chemistry – Complete Chapter Overview
The map in words
- Surface Chemistry
- Adsorption
- Definition
- Surface phenomenon
- Adsorbent and Adsorbate
- Types
- Physisorption
- Van der Waals forces
- Low heat 40 kJ/mol
- Multilayer
- Non-specific
- Chemisorption
- Chemical bonds
- High heat 400 kJ/mol
- Monolayer
- Specific
- Physisorption
- Freundlich Isotherm
- x/m = Kp to power 1/n
- log form gives straight line
- Slope = 1/n
- Intercept = log K
- Applications
- Gas masks
- Water softening
- Chromatography
- Sugar decolorisation
- Definition
- Catalysis
- Definition
- Alters rate
- Not consumed
- Types
- Homogeneous
- Same phase
- NO catalyst for SO2
- H2SO4 for ester hydrolysis
- Heterogeneous
- Different phase
- Fe for Haber process
- V2O5 for Contact process
- Homogeneous
- Special Catalysts
- Enzyme
- Protein based
- Lock and key model
- Optimum temp 37 degree C
- Zeolite
- Shape selective
- Acid catalysts
- Phase Transfer
- Two phase reactions
- Quaternary ammonium salts
- Nanocatalysts
- Metal nanoparticles
- High selectivity
- Enzyme
- Promoters and Poisons
- Promoter increases activity
- Poison blocks active sites
- Definition
- Colloids
- Classification
- By state
- Aerosol
- Foam
- Emulsion
- Sol
- Gel
- Solid sol
- By affinity
- Lyophilic stable
- Lyophobic unstable
- By state
- Preparation
- Dispersion methods
- Colloid mill
- Bredig arc
- Ultrasonic
- Peptisation
- Condensation methods
- Hydrolysis
- Reduction
- Oxidation
- Dispersion methods
- Purification
- Dialysis
- Electrodialysis
- Ultrafiltration
- Properties
- Tyndall effect
- Brownian motion
- Electrophoresis
- Coagulation
- Protective action
- Emulsions
- O/W type milk
- W/O type butter
- Emulsifiers
- Classification
- Adsorption
Comparison flowchart showing the key differences between adsorption and absorption processes
The map in words
- Surface Phenomenon
- Molecules accumulate on surface only: Adsorption
- Reversible process
- Example: Gas on charcoal: Fast process
- Molecules accumulate on surface only: Adsorption
- Bulk Phenomenon
- Molecules distributed throughout material: Absorption
- Generally irreversible
- Example: Water in sponge: Slow process
- Molecules distributed throughout material: Absorption
Comparison of physical and chemical adsorption characteristics
The map in words
- Types of Adsorption
- Weak Forces: Physical Adsorption
- Van der Waals forces
- Low heat: ~40 kJ/mol
- Multilayer formation
- Reversible & Fast
- Non-specific
- Strong Forces: Chemical Adsorption
- Chemical bonds formed
- High heat: 40-400 kJ/mol
- Monolayer only
- Slow & Specific
- Transfer of electrons
- Weak Forces: Physical Adsorption
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Explore DiagramsFrequently Asked Questions
What are the important topics in Surface Chemistry for Tamil Nadu Board Class 12 Chemistry?
Key topics in Surface Chemistry include Adsorption and Absorption, Classification of Adsorption, Factors Affecting Adsorption, Applications of Adsorption. Study these first, then practise questions on each for the Tamil Nadu Board Class 12 board exam.
What do the concept maps for Surface Chemistry show?
The 3 maps show how the ideas in Surface Chemistry connect: Surface Chemistry – Complete Chapter Overview; Comparison flowchart showing the key differences between adsorption and absorption processes. Each map is also written out as an outline on this page.
How should I revise Surface Chemistry for the Tamil Nadu Board Class 12 board exam?
Learn the core ideas first, then work through the 44 practice questions on Surface Chemistry. Revise definitions regularly and use flashcards for quick recall before the exam.
Sources & Official References
Content is aligned to the official syllabus. Refer to the board website for the latest curriculum.
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