# 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. $\frac{x}{m}=k{p}^{0.3}$

2. $\frac{x}{m}=k{p}^{2.5}$

3. $\frac{x}{m}=k{p}^{-0.5}$

4. $\frac{x}{m}=k{p}^{-1}$

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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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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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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