Is The NCERT Enough for The Chapter on Surface Chemistry from The JEE

Advanced Point of View?

Is the NCERT Solution for Chapter five Surface Chemistry really Helpful? All of the important subjects in Chapter 5 are covered in the NCERT answers. The solution will greatly assist pupils in comprehending definitions and categories. Learners can learn crucial words like emulsification, micelles, dialysis, coagulation, adsorption, as well as absorption as a result of this. Extensive pictures and graphs are used to explain why powdered substances are better adsorbents than crystalline substances. The NCERT solutions also include answers to scenario-based problems that urge pupils to think critically. Expert Chemistry professors explain all of the queries, providing deeper insight into the section’s key themes that helps students to gather the right concepts without any sort of worry at all.

NCERT Solutions

Every function of adsorption, kinds of adsorption, pressure impacts, as well as temperature effects on the surface are all covered in the Surface Chemistry section. The NCERT solution for 12th class Chemistry Chapter 5 includes answers to two segments: NCERT questions as well as in questions. These two parts provide a full explanation of all doubts and important topics. Section 5 Surface Chemistry – NCERT Solutions for 12th class Chemistry Some key issues in surface chemistry will be examined in this section. Catalysis, adsorption, as well as collisions, as well as emulsions as well as gels, are among the subjects covered. The NCERT solutions for 12th class chemistry section five Surface Chemistry focuses on providing answers using events that occur at surfaces as well as interfaces. Inside the CBSE Board examinations, this section is worth four points. The NCERT answers for section five Surface chemistry in 12th class chemistry are written by chemical specialists and delivered in a step-by-step format. Such solutions will assist you in both board exam preparation and competitive test preparation. Learners can grasp all of the vital ideas and practise problems by consulting the NCERT answers for class 12. To get more regarding NCERT answers for 12th class Chemistry Section five PDF download, continue reading.

Characteristics Of Chemisorption

Chemisorption has two attributes: chemical bonds, such as covalent or ionic bonds, establish the link here between solid (adsorbent) as well as the gas molecules. It is both very specialised and irreversible in character.

Role Of Desorption in The Process of Catalysis

Inside a catalytic reaction, its reactant attaches to the catalyst’s surface as well as forms a complex, which will become the reaction’s product after some processing. To extract the product and catalyst separately, we need to remove it all from the catalyst’s surface, and then use the desorption method to get the output.

Hardy Schulze law Modification

The greater the valence of the flocculating ion added, the greater its capacity to generate precipitation, according to the Hardy-Schulze law. He isn’t concerned with the size of the ion that polarises the second oppositely charged ion in this case. As a result, the updated rule should read “the larger the polarising strength of the extra flocculating ion, the greater its capacity to trigger precipitation.”

Why Is It Necessary to Wash the Precipitate Using Water Prior To Quantitatively Evaluating It?

Because the precipitate is the result of reactions, it may include residues of chemicals or undesirable compounds (like impurities, catalyst and reactant). We need to eliminate these extra chemicals that become adsorbed onto the surface of the desired product and provide us incorrect information about the reaction’s product for quantitative estimation. So, in order to prevent this issue, we rinse the precipitation using water.

Adsorption And Absorption

Adsorption seems to be a surface phenomenon wherein molecules or substances concentrate on the surface of a solid or liquid rather than in the bulk. Adsorbate is the substance that is adsorbed, while adsorbent is the medium from which it is adsorbed. The adsorbate doesn’t really permeate the adsorbent surface therefore focuses only on the liquid and solid surfaces during adsorption. When we dip a chalk stick through into the ink solution, for example, just the surface of the stick becomes coloured. When we break the chalk stick, students will discover that it is white on the inside.

Absorption is a bulk phenomenon in which the material is distributed equally all through the solid and otherwise liquid’s bulk.  Anhydrous calcium chloride, for instance, absorbs water vapours.

Physisorption and Chemisorption


  • It is neither particular nor reversible in nature.
  • It is dependent on the gas’s composition.
  • Adsorption enthalpy is minimal, about 20-40 kJ/mol.
  • A cool environment is essential.
  • It is dependent on the area of the surface. The higher the area, the faster the procedure.
  • Multimolecular layers form on the adsorbent surface as a result of step 7.

How to solve the question below?

Q.Assertion: Colloidal solution exhibit Tyndall effect while true solution particles. Reason: Because the size of the colloidal particles is large enough to scatter light as compared to size of the true solution particles.

  1. If both assertion and reason are true and the reason is the correct explanation of the assertion.
  2. If both assertion and reason are true and the reason is not the correct explanation of the assertion.
  3. If assertion is true but reason is false.
  4. If assertion is false but reason is true.


  • As a result of a chemical relationship
  • very particular and irrevocable in nature
  • It is dependent on the gas’s composition. Chemisorption occurs when gases react with the adsorbent.
  • Enthalpy (80-240 kJ/mol) if adsorption is high
  • You’ll need a lot of heat.
  • Sometimes a lot of activation energy is required.
  • The outcome is unimolecular.

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