Surfaces And Catalysis QUESTIONS AND ANSWERS

IIT JEE : Surfaces And Catalysis QUESTIONS AND ANSWERS :: part2 : 21 to 25

Following IIT JEE Entrance Multiple choice objective type questions and answers will help you in Maths, Physics and Chemistry 2024 examinations :

21.In physical adsorption the gas molecules are bound on the solid surface by

Chemical forces

Electrostatic forces

Graphical forces

Van der Waals forces.

22.Which of the following statements is not correct for lyophobic sols?

They have surface tension and viscosity similar to that of medium

Their particles are easily detected under ultra-microscope

The particles migrate in one direction in an electric field

Electrolytes cannot cause their coagulation.

23.Detergent action of soaps is due to

Coagulation

Emulsification properties

Ionization

High molecular mass.

24.Lyophobic colloids have

Little interaction with the dispersion medium

Strong interaction with the dispersion medium

Medium interaction with the dispersion medium

None of the above statements is true.

25.Colloidal solutions are purified by all except

Crystallisation

Ultra filteration

Ultra centrifugation

Dialysis.

More Surfaces And Catalysis QUESTIONS AND ANSWERS available in next pages

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