Surface Chemistry part 2

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NCERT Class 12 Chemistry Chapter-wise Solutions

•  1 – The Solid State
• 2 – Solutions
• 3 – Electrochemistry
• 4 – Chemical Kinetics
• 5 – Surface Chemistry
• 6 – General Principles and Processes of Isolation of Elements
• 7 – The p-Block Elements
• 8 – The d-and f-Blocks Elements
• 9 – Coordination Compounds
• 10 – Haloalkanes and Haloarenes
• 11 – Alcohols, Phenols and Ethers
• 12 – Aldehydes, Ketones and Carboxylic Acids
• 13 – Amines
• 14 – Biomolecules
• 15 – Polymers
• 16 – Chemistry in Everyday Life

CHAPTER FIVE SURFACE CHEMISTRY

• 5.1 Adsorption
• 5.2 Catalysis
• 5.3 Colloids
• 5.4 Classification of Colloids
• 5.5 Emulsions
• 5.6 Colloids Around Us

NCERT Solutions class 12 Chemistry Surface Chemistry part 2

(i) When a beam of light is passed through a colloidal sol.

(ii) An electrolyte, NaCl is added to hydrated ferric oxide sol.

(iii) Electric current is passed through a colloidal sol?

16. What are emulsions? What are their different types? Give example of each type.

17. What is demulsification? Name two demulsifiers.

18. Action of soap is due to emulsification and micelle formation. Comment.

19. Give four examples of heterogeneous catalysis.

20. What do you mean by activity and selectivity of catalysts?

21. Describe some features of catalysis by zeolites.

22. What is shape selective catalysis?

23. Explain the following terms:

(i) Electrophoresis

(ii) Coagulation

(iii) Dialysis

(iv) Tyndall effect.

24. Give four uses of emulsions.

25. Give four uses of emulsions.

26. Explain the terms with suitable examples:

(i) Alcosol

(ii) Aerosol

(iii) Hydrosol

27. Comment on the statement that “colloid is not a substance but a state of substance”

 covers both organic and inorganic chemistry. Please note that CBSE has reduced the syllabus for class 12 Chemistry. So, you must check the latest syllabus of CBSE while going through the NCERT solution of any chapter given in the class 12 NCERT book.