BSC Surface Chemistry and Colloids Guess Paper 2022

Surface Chemistry and Colloids Guess Paper

Important Questions for Surface Chemistry and Colloids

Important Questions of Surface Chemistry and Colloids

  1. Explain the difference between absorption and adsorption. Discuss the types of adsorption isotherms.
  2. Write notes on the following:

(a)     Freundlich adsorption isotherms.

(b)     Longmuir adsorption isotherms.


  1. What do you understand by the colloidal state of matter? Bring out the difference between a colloidal solution and a true solution.
  2. Describe the general methods for the preparation of colloids. Give one example for each method.
  3. Explain the use of (a) dialysis (b) electro-dialysis (c) ultrafiltration.
  4. Distinguish between lyophobic and lyophilic colloids. Describe Bredig’s arc method for the preparation of lyophobic colloids.
  5. Give an account of the applications of colloids.
  6. Write notes on the following:

(a)   Artificial rain.

(b)  Cottrell smoke precipitator.

(c)  Tyndall effect.

  1. How would you determine;

(a)     Colloidal solution is brought under influence of an electric field.

(b)     A beam of light is passed through a colloidal solution.

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(c)     Colloidal solution has very low osmotic pressure than the true solution, why?

Encourage and promote the concrete steps of students in favor of ecological transition and sustainable development, by crossing several themes and several Sustainable Development Goals (SDGs) of the United Nations 2030 Agenda
Encourage and promote student engagement, in particular to raise awareness of the role of class eco-delegates
Highlight examples and avenues of work for students and teachers
Contests like “Immediate boarding! » are organized by the association « Nous Les Ambitieuses! with the support of the ministry. It is aimed at teachers, educators and facilitators who, during school time, extracurricular or outside school time, offer educational activities related to writing or drawing. Several inspirational themes are proposed, such as representations of the ocean and the forest, products from the sea, or even the role of ambassador that everyone can have to protect the ocean.

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