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. The colloid is :

urea

blood

cane sugar

NaCl

2 / 10

2. Catalytic poisons act by :

making the products chemically inactive.

increasing the rate of the backward reaction.

chemical combination with any one of the reactants.

preferential adsorption on the catalyst surface.

3 / 10

3. 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)

4 / 10

4. Catalyst increases the rate of reaction by

decreasing threshold energy

decreasing activation energy

increasing activation energy

decreasing equilibrium constant

5 / 10

5. Nitrogen monoxide, NO, reacts with hydrogen, H 2, according to the following equation:
2NO(g) + 2H₂(g) → N₂(g) + 2H₂O(g)
If the mechanism for this reaction were,
2NO(g) + H₂(g) → N₂(g) + H₂O₂(g) ; slow
H2O₂(g) + H₂(g) → 2H₂O(g) ; fast
Which of the following rate laws would we expect to obtain experimentally?

Rate = k[H₂O₂][H₂]

Rate = k[NO]₂[H₂]

Rate = k[NO]₂[H₂]₂

Rate = k[NO][H₂]

6 / 10

6. For adsorption of a gas on a solid, the plot of log x/m vs log P is linear with slope equal to (n being whole number)

<em>k </em>

log <em>k</em>

<em>n</em>

1/<em>n</em><em></em>

7 / 10

7. Preparation of Lyophobic sols by chemical method involves

double decomposition

oxidation & reduction

hydrolysis

all of these

8 / 10

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

Ultramicroscope

Scattering

Brownian movement

Electrophoresis

9 / 10

9. Gold numbers of protective colloids A, B, C and D are 0.50, 0.01, 0.10 and 0.005, respectively. The correct order of their protective powers is

D < A < C < B

C < B < D < A

A < C < B < D

B < D < A < C

10 / 10

10. Choose the incorrect statement in respect of physisorption?

It is not specific in nature

It arises because of van der Waal’s force

It is reversible in nature

Enthalpy of adsorption is in the range 80-240 kJ mol^–1

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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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