CBSE (Science) Class 12CBSE
Share
Notifications

View all notifications

NCERT solutions for Class 12 Chemistry chapter 5 - Surface Chemistry

Chemistry Textbook for Class 12

Login
Create free account


      Forgot password?

Chapters

NCERT Chemistry Class 12

Chemistry Textbook for Class 12 - Shaalaa.com

Chapter 5: Surface Chemistry

Chapter 5: Surface Chemistry solutions [Pages 127 - 145]

Q 1 | Page 127

Write any two characteristics of Chemisorption.

Q 2 | Page 127

Give reasons for the following observations:

Physisorption decreases with increase in temperature.

Q 3 | Page 127

Why are powdered substances more effective adsorbents than their crystalline forms?

Q 4 | Page 133

It is necessary to remove CO when ammonia is prepared by Haber's process.

Q 5 | Page 133

Why is the ester hydrolysis slow in the beginning and becomes faster after sometime?

Q 6 | Page 133

What is the role of desorption in the process of catalysis?

Q 7 | Page 145

What modification can you suggest in the Hardy-Schulze law?

Q 8 | Page 145

Why is it essential to wash the precipitate with water before estimating it quantitatively?

Chapter 5: Surface Chemistry solutions [Page 146]

Q 1 | Page 146

Distinguish between the meaning of the terms adsorption and absorption. Give one example of each.

Q 2 | Page 146

What is the difference between physisorption and chemisorption?

Q 3 | Page 146

Give reason why a finely divided substance is more effective as an adsorbent.

Q 4 | Page 146

What are the factors which influence the adsorption of a gas on a solid?

Q 5.1 | Page 146

What is an adsorption isotherm?

Q 5.2 | Page 146

Describe Freundlich adsorption isotherm.

Q 6 | Page 146

What do you understand by activation of adsorbent? How is it achieved?

Q 7 | Page 146

What role does adsorption play in heterogeneous catalysis?

Q 8 | Page 146

Why is adsorption always exothermic?

Q 9 | Page 146

How are the colloidal solutions classified on the basis of physical states of the dispersed phase and dispersion medium?

Q 10 | Page 146

Discuss the effect of pressure and temperature on the adsorption of gases on solids.

Q 11 | Page 146

What are lyophilic and lyophobic sols? Give one example of each type. Why are hydrophobic sols easily coagulated?

Q 12 | Page 146

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?

Q 13 | Page 146

What are enzymes? Write in brief the mechanism of enzyme catalysis.

Q 14.1 | Page 146

How are colloids classified on the basis of Physical states of components

Q 14.2 | Page 146

How are colloids classified on the basis of Nature of dispersion medium

Q 14.3 | Page 146

How are colloids classified on the basis of  Interaction between dispersed phase and dispersion medium?

Q 15.1 | Page 146

Explain what is observed When a beam of light is passed through a colloidal sol.

Q 15.2 | Page 146

Explain what is observed An electrolyte, NaCl is added to hydrated ferric oxide sol.

Q 15.3 | Page 146

Explain what is observed Electric current is passed through a colloidal sol?

Q 17 | Page 146

How do emulsifires stabilise emulsion? Name two emulsifiers.

Q 18 | Page 146

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

Q 19 | Page 146

Give four examples of heterogeneous catalysis.

Q 20 | Page 146

What do you mean by activity and selectivity of catalysts?

Q 21 | Page 146

Describe some features of catalysis by zeolites.

Q 22 | Page 146

What is shape selective catalysis?

Q 23.1 | Page 146

Explain the term Electrophoresis

Q 23.2 | Page 146

Explain the terms Coagulation

Q 23.3 | Page 146

Explain the terms Dialysis 

Q 23.4 | Page 146

Explain the terms Tyndall effect.

Q 24 | Page 146

Give four uses of emulsions.

Q 25 | Page 146

What are micelles? Give an example of a micellers system.

Q 26.1 | Page 146

Explain the terms with suitable examples: - Alcosol

Q 26.2 | Page 146

Explain the terms with suitable examples Aerosol 

Q 26.3 | Page 146

Explain the terms with suitable examples: Hydrosol

Q 27 | Page 146

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

Chapter 5: Surface Chemistry

NCERT Chemistry Class 12

Chemistry Textbook for Class 12 - Shaalaa.com

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.

Further, we at Shaalaa.com are providing such solutions so that students can prepare for written exams. NCERT textbook solutions can be a core help for self-study and acts as a perfect self-help guidance for students.

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.

Using NCERT Class 12 solutions Surface Chemistry exercise by students are an easy way to prepare for the exams, as they involve solutions arranged chapter-wise also page wise. The questions involved in NCERT Solutions are important questions that can be asked in the final exam. Maximum students of CBSE Class 12 prefer NCERT Textbook Solutions to score more in exam.

Get the free view of chapter 5 Surface Chemistry Class 12 extra questions for Chemistry and can use Shaalaa.com to keep it handy for your exam preparation

S
View in app×