Chapter 2: Solutions
Chapter 3: Electrochemistry
Chapter 4: Chemical Kinetics
Chapter 5: Surface Chemistry
Chapter 6: General Principles and Processes of Isolation of Elements
Chapter 7: The p-block Elements
Chapter 8: The d-block and f-block Elements
Chapter 9: Coordinate Compounds
Chapter 10: Haloalkanes and Haloarenes
Chapter 11: Alcohols, Phenols and Ethers
Chapter 12: Aldehydes, Ketones and Carboxylic Acids
Chapter 13: Amines
Chapter 14: Biomolecules
Chapter 15: Polymers
Chapter 16: Chemistry in Everyday Life
NCERT Chemistry Class 12
Chapter 5: Surface Chemistry
Chapter 5: Surface Chemistry solutions [Pages 127 - 145]
Write any two characteristics of Chemisorption.
Give reasons for the following observations:
Physisorption decreases with increase in temperature.
Why are powdered substances more effective adsorbents than their crystalline forms?
It is necessary to remove CO when ammonia is prepared by Haber's process.
Why is the ester hydrolysis slow in the beginning and becomes faster after sometime?
What is the role of desorption in the process of catalysis?
What modification can you suggest in the Hardy-Schulze law?
Why is it essential to wash the precipitate with water before estimating it quantitatively?
Chapter 5: Surface Chemistry solutions [Page 146]
Distinguish between the meaning of the terms adsorption and absorption. Give one example of each.
What is the difference between physisorption and chemisorption?
Give reason why a finely divided substance is more effective as an adsorbent.
What are the factors which influence the adsorption of a gas on a solid?
What is an adsorption isotherm?
Describe Freundlich adsorption isotherm.
What do you understand by activation of adsorbent? How is it achieved?
What role does adsorption play in heterogeneous catalysis?
Why is adsorption always exothermic?
How are the colloidal solutions classified on the basis of physical states of the dispersed phase and dispersion medium?
Discuss the effect of pressure and temperature on the adsorption of gases on solids.
What are lyophilic and lyophobic sols? Give one example of each type. Why are hydrophobic sols easily coagulated?
What is the difference between multimolecular and macromolecular colloids? Give one example of each. How are associated colloids different from these two types of colloids?
What are enzymes? Write in brief the mechanism of enzyme catalysis.
How are colloids classified on the basis of Physical states of components
How are colloids classified on the basis of Nature of dispersion medium
How are colloids classified on the basis of Interaction between dispersed phase and dispersion medium?
Explain what is observed When a beam of light is passed through a colloidal sol.
Explain what is observed An electrolyte, NaCl is added to hydrated ferric oxide sol.
Explain what is observed Electric current is passed through a colloidal sol?
How do emulsifires stabilise emulsion? Name two emulsifiers.
Action of soap is due to emulsification and micelle formation. Comment.
Give four examples of heterogeneous catalysis.
What do you mean by activity and selectivity of catalysts?
Describe some features of catalysis by zeolites.
What is shape selective catalysis?
Explain the term Electrophoresis
Explain the terms Coagulation
Explain the terms Dialysis
Explain the terms Tyndall effect.
Give four uses of emulsions.
What are micelles? Give an example of a micellers system.
Explain the terms with suitable examples: - Alcosol
Explain the terms with suitable examples Aerosol
Explain the terms with suitable examples: Hydrosol
Comment on the statement that “colloid is not a substance but a state of substance”.
NCERT Chemistry Class 12
Textbook solutions for Class 12
NCERT solutions for Class 12 Chemistry chapter 5 - Surface Chemistry
NCERT solutions for Class 12 Chemistry chapter 5 (Surface Chemistry) include all questions with solution and detail explanation. This will clear students doubts about any question and improve application skills while preparing for board exams. The detailed, step-by-step solutions will help you understand the concepts better and clear your confusions, if any. Shaalaa.com has the CBSE Chemistry Textbook for Class 12 solutions in a manner that help students grasp basic concepts better and faster.
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Concepts covered in Class 12 Chemistry chapter 5 Surface Chemistry are Types of Adsorption, Enzyme Catalysis, Classification Based on Nature of Interaction Between Dispersed Phase and Dispersion Medium, Properties of Colloidal Solutions, Emulsions, Distinction Between Adsorption and Absorption, Mechanism of Adsorption, Adsorption Isotherms, Adsorption from Solution Phase, Applications of Adsorption, Homogeneous and Heterogeneous Catalysis, Adsorption Theory of Heterogeneous Catalysis, Shape-selective Catalysis by Zeolites, Catalysts in Industry, Colloids - Introduction, Classification Based on Type of Particles of the Dispersed Phase, Multimolecular, Macromolecular and Associated Colloids, Preparation of Colloids, Purification of Colloidal Solutions, Colloids Around Us, Adsorption - Introduction, Classification Based on Physical State of Dispersed Phase and Dispersion Medium.
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