Match the items of Column I and Column II.
| Column I | Column II | ||
|---|---|---|---|
| A. | Butter | 1. | Dispersion of liquid in liquid |
| B. | Pumice stone | 2. | Dispersion of solid in liquid |
| c. | Milk | 3. | Dispersion of gas in solid |
| D. | Paints | 4. | Dispersion of liquid in solid |
A. $\rightarrow(4)$ B. $\rightarrow$ (3) C. $\rightarrow(1)$ D. $\rightarrow$ (2)
A. Butter is an example of dispersion of liquid in solid.
B. Pumice stone is an example of dispersion of gas in solid in which gas bubbles are pearced within solid particles.
C. Milk is a dispersion of liquid in liquid in which fats and protein are dissolved in milk.
D. Paint is an example of solid in liquid.
Assertion (A) An ordinary filter paper impregnated with collodion solution stops the flow of colloidal particles.
Reason (R) Pore size of the filter paper becomes more than the size of colloidal particle.
Assertion (A) Colloidal solution show colligative properties.
Reason (R) Colloidal particles are large in size.
Assertion (A) Colloidal solutions do not show Brownian motion.
Reason (R) Brownian motion is responsible for stability of sols.
Assertion (A) Coagulation power of $\mathrm{Al}^{3+}$ is more than $\mathrm{Na}^{+}$.
Reason (R) Greater the valency of the flocculating ion added, greater is its power to cause precipitation (Hardy-Schulze rule).