Select the correct option based on statements below:
Assertion (A): | A hydrophilic sol is more stable than a hydrophobic sol. |
Reason (R): | When compared to hydrophobic sol, colloidal particles in hydrophilic sol are heavily hydrated. |
1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
3. | (A) is true but (R) is false. |
4. | Both (A) and (R) are false. |
Select the correct option based on statements below:
Assertion (A): | One part of micelles is lyophilic in nature. |
Reason (R): | Micelles have a lyophillic COO group. |
1. | Both (A) and (R) are true and (R) is the correct explanation of (A). |
2. | Both (A) and (R) are true but (R) is not the correct explanation of (A). |
3. | (A) is true but (R) is false. |
4. | Both (A) and (R) are false. |
Brownian motion of colloidal particles is caused by:
1. | Temperature fluctuations within the liquid phase. |
2. | Attraction and repulsion between charges on the colloidal particles. |
3. | Impact of the molecules of the dispersion medium on the colloidal particles. |
4. | None of the above. |
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.
How can alum help in water purification?
1. | Forming Si complex with clay particles. |
2. | The sulphate part, which combines with the dirt and removes it. |
3. | Aluminium which coagulates the mud particles. |
4. | Making mud water soluble. |
The coagulating power of electrolytes with ions Na+, Al3+, and Ba2+for arsenic sulphide sol increases in the order :
1.
2.
3.
4.
The equation that represents a Freundlich adsorption isotherm is:
1.
2.
3.
4.
The correct curve for Freundlich's adsorption isotherm is:
1. | 2. | ||
3. | 4. |
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
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.