The right option for the statement "Tyndall effect is exhibited by", is:

1. Starch solution 

2. Urea solution

3. NaCl solution

4. Glucose solution

Subtopic:  Colloidal Solution |
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Measuring Zeta potential is useful in determining which of the following property of a colloidal solution:

1. Solubility.

2. Stability of the colloidal particles.

3. Size of the colloidal particles.

4. Viscosity.

Subtopic:  Colloidal Solution |
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In which of the sols, the colloidal particles are with a negative charge?

1. TiO2

2. Hemoglobin

3. Starch

4. Hydrated Al2O3

Subtopic:  Colloidal Solution |
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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 |
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Which of the following represents a Freundlich adsorption isotherm?

1. xm=kp0.3

2. xm=kp2.5

3. xm=kp-0.5

4. xm=kp-1

Subtopic:  Adsorption Isotherm |
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The incorrect statement regarding enzymes is:
1. Enzymes are very specific for a particle reaction and substrate.
2. Enzymes are biocatalysts.
3. Like chemical catalysts, enzymes reduce the activation energy of bio processes.
4. Enzymes are polysaccharides.
Subtopic:  Catalyst |
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Given below are two statements:
I: In the coagulation of a negative sol, the flocculating power of the three given ions is in the order Al3+ > Ba2+ > Na+
II: In the coagulation of a positive sol, the flocculating power of the three given salts is in the order NaCl > Na2SO4 > Na3PO4
In the light of the above statements, choose the most appropriate answer from the options given below:
1. I is incorrect but II is correct.
2. Both I and II are correct.
3. Both I and II are incorrect.
4. I is correct but II is incorrect.
Subtopic:  Colloidal Solution |
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Match List-I with List-II:

List-I
(Example of Colloidal systems)
List-II
(Nature of dispersion medium and dispersed phase)
(a) Insecticide spray (i) Dispersion medium - liquid
     Dispersed phase - solid
(b) Whipped cream (ii) Dispersion medium - gas
      Dispersed phase - liquid
(c) Paint (iii) Dispersion medium - liquid
       Dispersed phase - liquid
(d) Hair cream (iv) Dispersion medium - liquid
       Dispersed phase -gas


Choose the correct answer from the options given below:

(a) (b) (c) (d)
1. (ii) (iv) (i) (iii)
2. (iv) (ii) (iii) (i)
3. (ii) (iv) (iii) (i)
4. (iv) (ii) (i) (iii)
Subtopic:  Colloidal Solution |
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Shown below are adsorption isotherms for a gas 'X' at temperatures T1 , T2 and T3 :
         
p and \(\frac xm\) represent pressure and extent of adsorption, respectively. The correct order of temperatures for the given adsorption is:
1.  T1 > T2 > T3
2.  T3 > T2 > T1
3.  T1 = T2 = T3
4.  T1 = T2 > T3
Subtopic:  Adsorption and Absorption |
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