Match List-I with List-II: Choose the correct answer from the options given below:List-I List-II (A) Gel (I) Hair cream (B) Foam (II) Dust (C) Emulsion (III) Cheese (D) Aerosol (IV) Whipped cream
(A)-(III), (B)-(IV), (C)-(I), (D)-(II)
Understanding Colloid Types and Examples
This question asks us to match different types of colloids from List-I with their corresponding examples from List-II. To solve this, we need to understand the characteristics of each type of colloid mentioned.
What are Colloids?
Colloids are mixtures where one substance is dispersed evenly throughout another substance. The particles in a colloid are larger than those in a true solution but smaller than those in a suspension. Colloids are classified based on the physical state of the dispersed phase and the dispersion medium.
Analyzing List-I and List-II
Let's look at the types of colloids in List-I and the examples in List-II.
List-I: Types of Colloids
- (A) Gel
- (B) Foam
- (C) Emulsion
- (D) Aerosol
List-II: Examples
- (I) Hair cream
- (II) Dust
- (III) Cheese
- (IV) Whipped cream
Matching Colloid Types with Examples
We will now match each colloid type from List-I with the most appropriate example from List-II based on their definitions:
- Gel: A gel is a colloid where a solid is dispersed in a liquid. Gels often have a semi-solid or jelly-like structure.
- Looking at List-II, Cheese is an example where milk solids are dispersed in the liquid phase of milk. This fits the description of a gel.
- Foam: A foam is a colloid where a gas is dispersed in a liquid or a solid.
- Looking at List-II, Whipped cream is made by dispersing air (gas) into cream (liquid). This is a classic example of a foam.
- Emulsion: An emulsion is a colloid where one liquid is dispersed in another liquid. The two liquids are usually immiscible (do not mix) and require an emulsifying agent to stabilize the dispersion.
- Looking at List-II, Hair cream is typically a mixture of oils and water, stabilized to form a creamy texture. This is an example of an emulsion (liquid dispersed in liquid).
- Aerosol: An aerosol is a colloid where solid particles or liquid droplets are dispersed in a gas.
- Looking at List-II, Dust consists of fine solid particles dispersed in the air (gas). This fits the definition of an aerosol.
Summary of Matching
Based on our analysis, the correct matching is:
- (A) - (III)
- (B) - (IV)
- (C) - (I)
- (D) - (II)
Let's put this into a table for clarity:
| List-I (Colloid Type) | List-II (Example) | Match |
|---|---|---|
| (A) Gel | (III) Cheese | (A)-(III) |
| (B) Foam | (IV) Whipped cream | (B)-(IV) |
| (C) Emulsion | (I) Hair cream | (C)-(I) |
| (D) Aerosol | (II) Dust | (D)-(II) |
Final Answer Matching
The matching we found is (A)-(III), (B)-(IV), (C)-(I), (D)-(II). We compare this with the given options to find the correct one.
Revision Table: Common Colloid Types and Examples
Understanding the phases involved in different colloid types is key.
| Colloid Type | Dispersed Phase | Dispersion Medium | Common Examples |
|---|---|---|---|
| Sol | Solid | Liquid | Paint, Ink, Sols of gold |
| Solid Sol | Solid | Solid | Colored glass, Gemstones |
| Gel | Solid | Liquid | Jelly, Cheese, Butter |
| Aerosol (Solid) | Solid | Gas | Smoke, Dust |
| Aerosol (Liquid) | Liquid | Gas | Fog, Mist, Clouds, Hairspray |
| Emulsion | Liquid | Liquid | Milk, Mayonnaise, Hair cream |
| Foam | Gas | Liquid | Shaving cream, Whipped cream, Fire extinguisher foam |
| Solid Foam | Gas | Solid | Pumice stone, Styrofoam, Sponge |
This table helps revise the different types of colloids based on the physical states of the dispersed phase and dispersion medium.
Additional Information: Dispersed Phase and Dispersion Medium
In a colloid, the substance that is dispersed as fine particles is called the dispersed phase. The continuous medium in which the dispersed phase particles are spread is called the dispersion medium. For example, in a dust aerosol, dust particles (solid) are the dispersed phase and air (gas) is the dispersion medium. In whipped cream, air bubbles (gas) are the dispersed phase and cream (liquid) is the dispersion medium.
Understanding the dispersed phase and dispersion medium helps in classifying colloids correctly and matching them with their examples. Different combinations of physical states for the dispersed phase and dispersion medium lead to the various types of colloids we discussed, like gels, foams, emulsions, and aerosols.
Important Questions from p-block Elements
Second most abundant element in alloy misch metal is:
Rate of a reaction changes from 2.48 × 10⁻³ mol⁻¹ sec⁻¹ to 4.96 × 10⁻³ mol⁻¹ sec⁻¹ when concentration of reactant is changed from 0.6 M to 2.4 M respectively, the order of reaction is:
Degree of dissociation, when molar conductivity of X at its concentration C is 24.14 and its limiting molar conductivity is 48.28 will be:
A divalent ion of 'V' (Atomic no. 23) in aqueous solution is:
Which of the following sols are correctly matched with their corresponding charges?
(A) Cr(OH)₃ sol : negatively charged sol
(B) TiO₂ sol : positively charged sol
(C) CdS sol : positively charged sol
(D) Gum : negatively charged sol
(E) Silver sol : positively charged sol
Choose the correct answer from the options given below:
