The coagulating power of an ion depends on:
 

1. The magnitude of the charge on the ion alone
2. Size of the ion alone
3. Both magnitude and sign of the charge on the ion.
4. The sign of the charge on the ion alone.

Subtopic:  Colloidal Solution |
 78%
From NCERT
NEET - 2018
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Fog is a ______ type of colloidal solution:
 
1. Gas in liquid.
2. Solid in gas.
3. Gas in gas.
4. Liquid in gas.
Subtopic:  Colloidal Solution |
 81%
From NCERT
NEET - 2016
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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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Which one of the following statements about enzyme catalysis is incorrect?

1. Enzymes are mostly proteinous in nature.
2. Enzyme action is specific.
3. Enzymes are denaturized by ultraviolet rays at high temperatures.
4. Enzymes are least reactive at an optimum temperature.
Subtopic:  Catalyst |
 88%
From NCERT
AIPMT - 2012
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The protecting power of lyophilic colloidal sol is expressed in terms of:

1. Coagulation value

2. Gold number

3. Critical micelle concentration

4. Oxidation number

Subtopic:  Colloidal Solution |
 78%
AIPMT - 2012
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If x is the amount of adsorbate and m is the amount of adsorbent, which of the following relations is not related to adsorption process?

1.  xm=fT at constant P

2.  p=fT at constant x/m

3.  xm=p×T

4.  xm=fp at constant T

Subtopic:  Adsorption Isotherm |
 55%
From NCERT
AIPMT - 2011
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Which mixture of the solutions will lead to the formation of a negatively charged colloidal [AgI]I- sol?

1. 50 mL of 0.1 M AgNO3 + 50 mL of 0.1 M KI

2. 50 mL of 1 M AgNO3 + 50 mL of 0.5 M KI

3. 50 mL of 1 M AgNO3 + 50 mL of 2 M KI

4. 50 mL of 2 M AgNO3 + 50 mL of 1.5 M KI

Subtopic:  Colloidal Solution |
 65%
From NCERT
NEET - 2019
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The decomposition of phosphine (PH3) on tungsten at low pressure is a first-order reaction. It is because the:

1. rate is proportional to the surface coverage

2. rate is inversely proportional to the surface coverage

3. rate is independent of the surface coverage

4. rate of decomposition is very slow

Subtopic:  Adsorption and Absorption |
 60%
NEET - 2016
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What happens during electro-osmosis of Fe(OH)3 sol?

1. Sol particles move towards the anode.
2. Sol particles move towards the cathode of a sol.
3. The higher the gold number, the greater will be the protective power of a lyophilic colloid.
4. The dispersion medium moves towards the anode.
Subtopic:  Colloidal Solution |
From NCERT
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In an adsorption experiment, a graph between log(x/m) versus log P was found to be linear with a slope of 45°. The intercept on the y-axis was found to be 0.3. What will be the value of x/m at a pressure of 3 atm for the Freundlich adsorption isotherm when 1/n remains constant?

[Antilog 0.3 = 2]

1.  2

2.  4

3.  6

4.  5

Subtopic:  Adsorption Isotherm |
From NCERT
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