Surface Chemistry (Chapter 5) => 1 Marks Questions Answers

These are 1 Marks Questions Answers on "Surface Chemistry" (Chapter 5). Practice for CBSE EXAMINATION, CBSE NEET etc.

        Q.1. What are the physical states of dispersed phase and dispersion medium of froth?

  Ans - Dispersed phase is gas, dispersion medium is liquid.

    Q.2. What is the cause of Brownian movement among colloidal particles? 

   Ans - Due to collision between particles.

      

     Q.3. Arrange the solutions: True solution, colloidal solution, suspension in decreasing order of their particles size?

Ans – Suspension > colloidal > true solution.

     

     Q.4. Give an example of micelles system?

Ans – Sodium stearate (C17 H35 COO^- Na⁺)

        

    Q.5.Why is it necessary to remove CO when ammonia is obtained by Haber‟s process?

Ans- CO acts as poison catalyst for Haber‟s process therefore it will lower the activity of solution therefore it is necessary to remove when NH₃ obtained by Haber‟s process.

 Q.6.  How is adsorption of a gas related to its critical temperature?

Ans- Higher the critical temperature of the gas. Greater is the ease of liquefaction.

i.e. greater Vander walls forces of attraction and hence large adsorption will occur.

  Q.7. What is meant by Shape Selective Catalyst?

Ans – On the Shape Selective Catalyst, the rate depends upon pore size of the catalyst and the shape & size of the reactant and products molecules.

   

 Q.8. Of the physiorption & chemisorptions, which type of adsorption has higher enthalpy of adsorption?

Ans - chemisorptions.

  Q.9. Write down the Example of Positive Sol? 

Ans – Ferric hydro-oxide sol.

Q.10.Write down the Example of Negative Sol? 

Ans – Arsenic sulphide.