Following are various types of colloids. Match column X with column Y.
`{:(X,"(Colloids)",Y,"(Classification)"),(I,"Rain cloud",A," Sol"),(II,"Gelatin",B," Aerosol"),(III,"Soap suds",C," Gel"),(IV,"Butter",D," Foam"):}`
Correct matching is :

Options

A. `{:(I,II,III,IV),(A,B,C,D):}`
B. `{:(I,II,III,IV),(A,C,B,D):}`
C. `{:(I,II,III,IV),(B,A,D,C):}`
D. `{:(I,II,III,IV),(B,A,C,D):}`

Answer

To solve the problem of matching the colloids in column X with their classifications in column Y, we will analyze each item in column X and determine its corresponding classification.

### Step-by-Step Solution:

1. **Identify the Colloids in Column X:**
- I. Rain cloud
- II. Gelatin
- III. Soap suds
- IV. Butter

2. **Analyze Each Colloid:**
- **I. Rain cloud:**
- A rain cloud consists of water droplets dispersed in air.
- Here, the dispersed phase is water (liquid), and the dispersion medium is air (gas).
- This matches the classification of an **Aerosol** (dispersed phase is liquid in gas).

- **II. Gelatin:**
- Gelatin is a colloid where solid particles are dispersed in a liquid medium.
- The dispersed phase is solid (gelatin), and the dispersion medium is liquid (water).
- This matches the classification of a **Sol** (solid in liquid).

- **III. Soap suds:**
- Soap suds are bubbles of air dispersed in a liquid (soap solution).
- The dispersed phase is gas (air), and the dispersion medium is liquid (soap solution).
- This matches the classification of a **Foam** (gas in liquid).

- **IV. Butter:**
- Butter is an emulsion where fat (liquid) is dispersed in a solid medium.
- The dispersed phase is liquid (fat), and the dispersion medium is solid (butter).
- This matches the classification of a **Gel** (liquid in solid).

3. **Match Each Colloid with its Classification:**
- I. Rain cloud → B. Aerosol
- II. Gelatin → A. Sol
- III. Soap suds → D. Foam
- IV. Butter → C. Gel

### Final Matching:
- I (Rain cloud) → B (Aerosol)
- II (Gelatin) → A (Sol)
- III (Soap suds) → D (Foam)
- IV (Butter) → C (Gel)

### Correct Matching:
- I - B
- II - A
- III - D
- IV - C

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