The process of chemisorption is :

1. Highly specific in nature.
2. Dependent on the surface area of the adsorbent.
3. Not specific in nature.
4. Both (1) and (2) 
Subtopic:  Adsorption and Absorption |
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Assertion(A): Physisorption decrease with the increase in temperature.
Reason(R): Physisorption is exothermic in nature.

1. Both assertion and reason are true, and reason is the correct explanation of the assertion.

2. Both assertion and reason are true, but reason is not the correct explanation of the assertion.

3. Assertion is true but reason is false.

4. Assertion is false but reason is true.
Subtopic:  Adsorption and Absorption |
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Assertion(A): Powdered substances are more effective adsorbents than their crystalline forms
Reason(R): Powdered substance has more surface area and the extent of adsorption increases with the increase of the surface area of the adsorbent.

1. Both assertion and reason are true, and the reason is the correct explanation of the assertion.

2. Both assertion and reason are true, but the reason is not the correct explanation of the assertion.

3. Assertion is true but the reason is false.

4. Assertion is false but the reason is true.
Subtopic:  Adsorption and Absorption |
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It is necessary to remove CO when ammonia is obtained by Haber’s process because-
1. CO reacts with N2 and decreases the rate of reaction.
2. CO reacts with H2 and decreases the rate of reaction
3. CO adversely affects the activity of the iron catalyst
4. CO reacts with ammonia and decreases the rate of reaction.
Subtopic:  Catalyst |
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The ester hydrolysis  remains slow in the beginning and becomes faster after sometime, because : 

1. Acid produced in the reaction acts as an auto-catalyst.
2. Acid produced in the reaction acts as a poison.
3. Alcohol acts as a negative catalyst in the reaction.
4. Both (2) and (3) 
Subtopic:  Catalyst |
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The role of desorption in the process of catalysis is to :

1. Slower the rate of reaction.
2. Make the surface of solid catalyst free.
3. Increase the temperature of reaction.
4. Decrease the availabilty of surface for reactants.
Subtopic:  Adsorption and Absorption |
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According to Hardy-Schulze law :

1. Polarising power of flocculating ion is directly proportional to its power to cause precipitation.
2. Valence of flocculating ion is directly proportional to its power to cause precipitation.
3. Polarising power of flocculating ion is inversely proportional to its power to cause precipitation.
4. Both (1) and (2) 
 
Subtopic:  Colloidal Solution |
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It is essential to wash the precipitate with water before estimating it quantitatively . It is done to:

1. Make volatile product with solution.
2. Make it soluble in the solution.
3. Remove the adsorbed ions.
4. All of the above.
Subtopic:  Colloidal Solution |
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