Among the following options, the gas that will be more readily adsorbed on the surface of charcoal is:

1. CO2             

2. NH3               

3. Br2           

4. N2

Subtopic:  Adsorption and Absorption |
 64%
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According to Freundlich adsorption isotherm, at high pressure, the value of xm is - 

1. Directly proportional to the pressure.

2. Inversely proportional to the pressure.

3. Directly proportional to the square of the pressure.

4. Independent of the pressure.

Subtopic:  Adsorption Isotherm |
 60%
From NCERT
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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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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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Emulsifying agent stabilized the emulsion of oil in water by

1.  Forming an interfacial film between suspended particles and the medium

2.  Dissolving the suspended particles into the medium completely

3.  Coagulating the suspended particles from the medium completely

4.  Converting the suspended particles into vapor completely

Subtopic:  Emulsions |
 70%
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If 227g of charcoal having, active surface area 1000 m2/g is used for monolayer absorption of a gas having molecular radius 10-8 cm, then volume of the absorbed gas at STP is [Avogadro's number = 6 × 1023]

1.  11.2 L

2.  22.4 L

3.  7.46 L

4.  3.73 L

Subtopic:  Adsorption and Absorption |
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Among the following, the surfactant that will form micelles in aqueous solution at the highest molar concentration

1.  CH3 - CH214 - OSO3- K+

2.  CH3 - CH210 - COO- Na+

3.  CH3 - CH211 - COO3- Na+

4.  CH3 - CH215 - N+H3 Bre

Subtopic:  Emulsions |
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The decreasing order of coagulating power of an electrolyte to coagulate the As2S3 sol is

1.  NaCl > Al2SO43 > Ba3PO42

2.   Ba3PO42 > NaCl > Al2SO43 

3.  Al2SO43  > Ba3PO42 > NaCl 

4.  NaCl >Ba3PO42 > Al2SO43 

Subtopic:  Colloidal Solution |
 85%
From NCERT
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When detergent is added in water, some properties are measured with respect to concentration. Choose the incorrect plot.

1.  

2.  

3.  

 

4.  

 

Subtopic:  Adsorption Isotherm |
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The coagulation of 100 ml of colloidal solution of gold is completely prevented by the addition of 0.25 gm of a substance 'X' to it before adding 1 ml of 10%  NaCl solution. The gold number of 'X' is

1.  25

2.  0.25

3.  2.5

4.  0.025

Subtopic:  Colloidal Solution |
 54%
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