Pumice stone is an example of- 
1. foam  2. sol 
3. gel  4. solid sol 
Subtopic:  Colloidal Solution |
 61%
From NCERT
NEET - 2023
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Which of the following is a positively charged sol? 
1. Methylene blue sol 
2. Congo red sol 
3. Siver sol 
4. \(Sb_2S_3 ~sol\)
Subtopic:  Colloidal Solution |
 57%
From NCERT
NEET - 2023
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Given below are two statements:
Statement I: In the coagulation of a negative sol, the flocculating power of the three given ions is in the order Al3+ > Ba2+ > Na+
Statement 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 |
 69%
From NCERT
NEET - 2022
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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 |
 53%
From NCERT
NEET - 2022
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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 |
 65%
From NCERT
NEET - 2021
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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 |
 78%
From NCERT
NEET - 2020
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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 |
 53%
From NCERT
NEET - 2020
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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 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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The coagulation values in millimoles per litre of the electrolytes used for the coagulation of As2Sare given below 
I. (NaCl) = 52, II. (BeCl2) = 0.69, III. (MgSO4) = 0.22 
What is the correct order of their coagulating power?
1. I > II > III
2. II > I >III
3. III > II > I
4. III > I >II

Subtopic:  Colloidal Solution |
 81%
From NCERT
NEET - 2016
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