The correct curve for Freundlich's adsorption isotherm is:

1.  2.
3. 4.

Subtopic:  Adsorption Isotherm |
 64%
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Which of the following process is not responsible for the presence of electric charge on the sol particles?

1.  Electron capture by sol particles

2.  Adsorption of ionic species from solution

3.  Formation of Helmholtz electrical double layer

4.  Absorption of ionic species from solution

Subtopic:  Colloidal Solution |
 60%
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The phenomenon that  is applicable to the process shown in the figure is : 

                    

1.  Absorption

2.  Adsorption

3.  Coagulation

4.  Emulsification

Subtopic:  Adsorption and Absorption |
 78%
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The correct statements among the following are:

a. Micelle formation by soap in an aqueous solution is possible at all temperatures
b. Micelle formation by soap in an aqueous solution occurs above a particular concentration
3. On dilution of soap solution micelles may revert to individual ions
4. Soap solution behaves like a normal strong electrolyte at all concentrations


1. (a, b)
2. (b, c)
3. (c, d)
4. (a, d)

Subtopic:  Colloidal Solution |
 84%
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The correct statements among the following about solid catalysts is -

a. Same reactants may give different products by using different catalysts
b. Catalyst does not change ∆ H of reaction
c. Catalyst is required in large quantities to catalyse reactions
d. Catalytic activity of a solid catalyst does not depend upon the strength of chemisorption


1. a and b
2. b and c
3. c and d
4. a and d

Subtopic:  Catalyst |
 71%
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At the equilibrium position in the process of adsorption ..........

1.   ΔH > 0

2.   ΔH = TΔS

3.   ΔH > TΔS

4.   ΔH < TΔS

Subtopic:  Adsorption and Absorption |
 73%
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The process that does not occur at the interface of phases is :

1.  Crystallisation

2.  Heterogeneous catalysis

3.  Homogeneous catalysis

4.  Corrosion

 

 
Subtopic:  Catalyst |
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The interface that cannot be obtained is 

1. Liquid-liquid

2. Solid-liquid

3. Liquid-gas

4. Gas-gas

 
Subtopic:  Adsorption and Absorption | Catalyst | Lyophilic & Lyophobic Sol |
 87%
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The term ‘sorption’ stands for.........

1.  Absorption

2.  Adsorption 

3.  Both absorption and adsorption

4.  Desorption

 
Subtopic:  Adsorption and Absorption |
 96%
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Extent of adsorption of adsorbate from the solution phase increases with:
1. Increase in amount of adsorbate in solution.
2. Decrease in surface area of adsorbent.
3.  Increase in temperature of solution.
4. Decrease in amount of adsorbate in solution.

Subtopic:  Adsorption and Absorption |
 75%
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