Chemistry 12 Chapter 5 Exemplar Solutions Surface Chemistry Part 4

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Question 21:

Arrange the following diagrams in correct sequence of steps involved in the mechanism of catalysis, in accordance with modern adsorption theory.

Mechanism of catalysis

Mechanism of Catalysis

(i)

(ii)

(iii)

(iv)

Answer: (ii)

Question 22:

Which of the following process is responsible for the formation of delta at a place where rivers meet the sea?

(i) Emulsification

(ii) Colloid formation

(iii) Coagulation

(iv) Peptisation

Answer: (iii)

Question 23:

Which of the following curves is in accordance with Freundlich adsorption isotherm?

(i)

Freundlich adsorption isotherm

Freundlich Adsorption Isotherm

(ii)

Freundlich adsorption isotherm

Freundlich Adsorption Isotherm

(iii)

Freundlich adsorption isotherm

Freundlich Adsorption Isotherm

(iv)

Freundlich adsorption isotherm

Freundlich Adsorption Isotherm

Answer: (iii)

Question 24:

Which of the following process is not responsible for the presence of electric charge on the sol particles?

(i) Electron capture by sol particles.

(ii) Adsorption of ionic species from solution.

(iii) Formation of Helmholtz electrical double layer.

(iv) Absorption of ionic species from solution.

Answer: (iv)

Question 25:

Which of the following phenomenon is applicable to the process shown in the Fig. 5.1?

Phenomenon

Phenomenon

(i) Absorption

(ii) Adsorption

(iii) Coagulation

(iv) Emulsification

Answer: (ii)

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