Class 12th Chemistry Chapter Surface Chemistry Free MCQ Test Quiz

Prepare for your Class 12 Chemistry exams with our free test quiz on Surface Chemistry! Learn about Adsorption, Catalysis, Colloidal State, and Emulsions. Explore Physisorption and Chemisorption, factors affecting gas adsorption, enzyme catalysis, and properties of colloids. Dive into the fascinating world of surface chemistry now! #Class12Chemistry #FreeTestQuiz #SurfaceChemistry #Adsorption #Catalysis #Colloids #Emulsions

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12th Chemistry: Surface Chemistry

1 / 10

1. A catalyst :

lowers the activation energy

changes the rate constant

changes the product

itself destroyed in the reaction

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2 / 10

2. Which of the following step(s) is/are not involved in the mechanism of adsorption theory of heterogeneous catalyst?
(i) Diffusion of reactants to the surface of the catalyst.
(ii) Sorption of reactant molecules on the surface of the catalyst.
(iii) Occurrence of chemical reaction on the catalyst’s surface through formation of an intermediate.
(iv) Desorption of reaction products from the catalyst’s surface.
(v) Diffusion of reaction products away from the catalyst’s surface.

(i) only

(ii) and (iv)

(ii) only

(i), (ii) and (v)

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3 / 10

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

Aqueous starch solution

Aqueous protein solution

Gold solution

Polymer solvent in some organic solvents

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4 / 10

4. Purple of cassius is colloidal solution of :

Silver

Lead

Gold

Mercury

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5 / 10

5. Extent of physisorption of a gas increases with _______.

increase in temperature.

decrease in temperature.

decrease in surface area of adsorbent.

decrease in strength of van der Waal’s forces.

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6 / 10

6. The density of gold is 19 g/cm³. If 1.9 × 10^–4 g of gold is dispersed in one litre of water to give a sol having spherical gold particles of radius 10 nm, then the number of gold particles per mm³ of the sol will be

1.9 × 10¹²

6.3 × 10¹⁴

6.3 × 10¹⁰

2.4 × 10⁶

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7 / 10

7. A catalyst can affect reversible reaction by

changing equilibrium constant

slowing forward reaction

attaining equilibria in both directions

None of these

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8 / 10

8. Which of the following is related to adsorption?
(i) △H = – ve (ii) △S = – ve (iii) –T△S = – ve (iv) △G = – ve

(i), (ii) and (iv)

(ii) and (iii)

(iii) only

(i), (iii) and (iv)

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9 / 10

9. Catalyst increases the rate of reaction by

decreasing threshold energy

decreasing activation energy

increasing activation energy

decreasing equilibrium constant

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10 / 10

10. An aerosol is a :

dispersion of a solid or liquid in a gas

dispersion of a solid in a liquid

dispersion of a liquid in a liquid

solid solution

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Chapter wise chemistry mock test quiz

? Class 12 Chemistry Chapter 5 Free Test Quiz: Surface Chemistry, Adsorption, and Colloids! ?

? Are you studying Class 12 Chemistry and preparing for your exams? Test your knowledge with our free online quiz on Chapter 5 – Surface Chemistry! This chapter covers essential topics such as Adsorption, Catalysis, Colloidal State, and Emulsions.

? Dive into the world of surface chemistry and explore the fascinating concepts of Physisorption and Chemisorption. Learn about the factors that influence the adsorption of gases on solids and understand the different types of catalysis, including homogenous and heterogeneous catalysis. Discover the unique properties of enzymes and how they catalyze reactions with high selectivity.

? Explore the intriguing world of colloids and differentiate between true solutions, colloids, and suspensions. Uncover the distinction between lyophillic and lyophobic colloids, as well as multimolecular and macromolecular colloids. Witness captivating phenomena like the Tyndall effect, Brownian movement, electrophoresis, and coagulation.

? Lastly, delve into the realm of emulsions and explore various types of emulsions, understanding their significance in daily life and industrial applications.

? Whether you are aiming for top scores or simply want to expand your knowledge, our free test quiz is an excellent way to reinforce your understanding of Class 12 Chemistry Chapter 5 – Surface Chemistry. Take the quiz now and enhance your learning journey!

#Class12Chemistry #SurfaceChemistry #Adsorption #Catalysis #ColloidalState #Emulsions #FreeTestQuiz

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