Surface Chemistry MCQ Questions for Class 12 Chemistry Chapter 5 with Answers

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Find here the NCERT chapter-wise Multiple Choice Questions from Class 12 Chemistry book Chapter 5 Surface Chemistry with Answers Pdf free download. This may assist you to understand and check your knowledge about the chapters. Students also can take a free test of the Multiple Choice Questions of Surface Chemistry. Each question has four options followed by the right answer. These MCQ Questions are selected supported by the newest exam pattern as announced by CBSE.

MCQ Questions for Class 12 Chemistry With Answers

Q1. Which of the following is a lyophobic colloid?

(i) gelatin
(ii) sulphur
(iii) starch
(iv) gum arabic.

(ii) sulphur

Q2. At CMC (Critical Micellisation Cone.) the surface molecules

(i) associate
(ii) dissociate
(iii) decompose
(iv) become completely soluble.

(i) associate

Q3. Tyndall effect confirms the

(i) gravity effect on the sol. particles
(ii) light scattering by the sol. particles
(iii) heterogeneous nature of sols.
(iv) Brownian motion of the sol. particles

(iii) heterogeneous nature of sols.

Q4. Which shape selective catalyst is used to convert alcohol to gasoline?

(i) Trpsin
(ii) Calgon
(iii) ZSM-5
(iv) Zeigler-Natta catalyst

(iii) ZSM-5

Q5. The electrical charge on a colloidal particle is observed by:

(i) Ultramicroscope
(ii) Scattering
(iii) Brownian movement
(iv) Electrophoresis

(iv) Electrophoresis

Q6. The protective power of a lyophilic sol is

(i) defined by Hardy-Schulze rule
(ii) proportional to the quantity of electrical charge on it
(iii) measured in terms of gold number
(iv) determined by the size of its colloidal particles.

(iii) measured in terms of gold number

Q7. Tyndall effect is due to

(i) electric charge
(ii) scattering of light
(iii) absorption of light
(iv) none of these.

(ii) scattering of light

Q8. Presence of traces of arsenious oxide (As2O3) in the reacting gases SO2 and O3 in presence of plantinised asbestos in contact process acts as

(i) catalytic promoter
(ii) catalytic poison
(iii) dehydrating agent
(iv) drying agent

(ii) catalytic poison

Q9. Lyophillic colloids are stable due to

(i) charge on the particles.
(ii) large size of the particles.
(iii) small size of the particles.
(iv) layer of dispersion of medium on the particles.

(iv) layer of dispersion of medium on the particles.

Q10. Milk is colloid in which :

(i) Liquid is dispersed in liquid
(ii) Gas is dispersed in liquid
(iii) Sugar is dispersed in water
(iv) Solid is dispersed in liquid

(i) Liquid is dispersed in liquid

Q11. Which one of the following is not applicable to chemisorption?

(i) Its heat of adsorption is high
(ii) It takes place at high temperature
(iii) It is reversible
(iv) It forms mono-molerular layers.

(iii) It is reversible

Q12. Blood may be purified by

(i) coagulation
(ii) dialysis
(iii) electro-osmosis
(iv) filtration

(ii) dialysis

Q13. Which of the following types of metals make the most efficient catalyst?

(i) Alkali metals
(ii) Transition metals
(iii) Inner transition metals
(iv) Alkaline earth metals

(ii) Transition metals

Q14. Peptization is a process of

(i) precipitation of colloidal particles.
(ii) purification of colloids.
(iii) dispersing precipitate into colloidal solution.
(iv) movement of colloidal particles in the electric field.

(iii) dispersing precipitate into colloidal solution.

Q15. The movement of colloidal particles, under applied electric current is known as :

(i) electrodialysis
(ii) dialysis
(iii) electrophoresis
(iv) none of the above

(iii) electrophoresis

Q16. All colloids

(i) are suspension of one phase in another
(ii) are two-phase systems
(iii) contain only water-soluble particles
(iv) are true solutions.

(ii) are two-phase systems

Q17. Emulsifying agent present in milk that makes it stable is

(i) maltose
(ii) casein
(iii) lactose
(iv) none of these

(ii) casein

Q18. The activity of an enzyme becomes ineffective

(i) at low temperature
(ii) at atmospheric pressure
(iii) at high temperature
(iv) in aqueous medium

(iii) at high temperature

Q19. A catalyst

(i) changes the equilibrium constant
(ii) lowers the activation energy
(iii) increases the forward and backward reactions at different speeds.
(iv) follows same mechanism for the reaction.

(ii) lowers the activation energy

Q20. Colloidal particles in a sol can be coagulated by

(i) heating
(ii) adding an electrolyte
(iii) adding oppositely charge sol
(iv) any of the above methods

(iv) any of the above methods

Q21. The colour of sky is due to

(i) absorption of light
(ii) transmission of light
(iii) scattering of light
(iv) all of these

(iii) scattering of light

Q22. Which of the following gases present in a polluted area will be adsorbed most easily on the charcoal gas mask?

(i) H2
(ii) O3
(iii) N2
(iv) SO2

(iv)

Q23. Which of the following is a lyophobic colloidal solution ?

(i) Aqueous starch solution
(ii) Aqueous protein solution
(iii) Gold solution
(iv) Polymer solvent in some organic solvents

(iii) Gold solution

Q24. Fog is colloidal system of

(i) gas in liquid
(ii) liquid in gas
(iii) gas in gas
(iv) gas in solid.

(ii) liquid in gas

Q25. At high concentration of soap in water, soap behaves as

(i) molecular colloid
(ii) associated colloid
(iii) macro molecular colloid
(iv) lyophilic colloid

(ii) associated colloid

I Think the given NCERT MCQ Questions for class 12 Chemistry book Chapter 5 Surface Chemistry with Answers Pdf free download will assist you. If you’ve got any queries regarding CBSE Class 12 Chemistry Surface Chemistry MCQs Multiple Choice Questions with Answers, drop a comment below and that we will come back to you soon.

MCQ Questions for Class 12 Chemistry with Answers

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