The factors that influence the adsorption of a gas on a solid is/are:

1. Nature of the gas.

2. Surface area of the solid.

3. Effect of pressure.

4. All of the above.

Subtopic:  Adsorption and Absorption |
 95%
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Why is a finely divided substance more effective as an adsorbent?

1. Small surface area.

2. Large surface area.

3. Weak molecular bonding.

4. Strong molecular bonding.

Subtopic:  Adsorption and Absorption |
 86%
From NCERT
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The probable reasons of the exothermic nature of adsorption is:

1. Adsorption leads to a decrease in the residual forces on the surface of the adsorbent.
2. ∆S is negative.
3. Both (1) and (2) 
4. None of the above.

Subtopic:  Adsorption and Absorption |
 82%
From NCERT
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The characteristics associated with adsorption are:

1. ∆G, ∆H, and ∆S are all negative.
2. ∆G and ∆H are negative, but ∆S is positive.
3. ∆G and ∆S are negative, but ∆H is positive.
4. ∆G is negative, but ∆H and ∆S are positive.

Subtopic:  Adsorption and Absorption |
 82%
From NCERT
NEET - 2016
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Which of the following statement is false?

1. Adsorption is a reversible process and is accompanied by a decrease in pressure.
2. Adsorption decreases with an increase in pressure.
3. Adsorption is an exothermic process.
4. The magnitude of physisorption adsorption decreases with an increase in temperature.

Subtopic:  Adsorption and Absorption |
 75%
From NCERT
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Water vapours can be both adsorbed and absorbed by respectively ?

1. Silica gel and CaCl2

2. Chalk and CaCl2

3. CaCl2 and Silica gel

4. CaCl2 and Chalk

Subtopic:  Adsorption and Absorption |
 72%
From NCERT
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The graph between logxm vs log p is given below:

What is the value of the slope?

1. 12n

2. n

3. 1n

4.1n2

Subtopic:  Adsorption Isotherm |
 92%
From NCERT
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In the Freundlich adsorption isotherm, the value of 1/n is:
1. Between 0 and 1 in all cases.
2. Between 2 and 4 in all cases.
3. 1 in the case of physical adsorption.
4. 1 in the case of chemisorption.

Subtopic:  Adsorption Isotherm |
 91%
From NCERT
AIPMT - 2012
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An adsorption isotherm is a plot between:

1. The extent of adsorption \(({x \over m})\) against the pressure of gas (P) at constant V.
2. The extent of adsorption \(({x \over m})\) against the pressure of gas (P) at constant T.
3. The extent of absorption \(({x \over m})\) against the volume of gas (V) at constant P.
4. The extent of absorption \(({x \over m})\) against the pressure of gas (P) at constant T.
Subtopic:  Adsorption Isotherm |
 81%
From NCERT
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The equation that represents a Freundlich adsorption isotherm is: 

1. xm=kp0.3

2. xm=kp2.5

3. xm=kp-0.5

4. xm=kp-1

Subtopic:  Adsorption Isotherm |
 71%
From NCERT
NEET - 2019
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