Arrange the following liquids in decreasing order of boiling points : coal tar, fuel oil, kerosene, petrol

Options

A. coal tar `gt` fuel oil `gt` kerosene `gt` petrol
B. fuel oil `gt` kerosene `gt` petrol `gt` coal tar
C. kerosene `gt` petrol `gt` coal tar `gt` fuel oil
D. petrol `gt` coal tar `gt` fuel oil `gt` kerosene

Explanation

To arrange the liquids coal tar, fuel oil, kerosene, and petrol in decreasing order of their boiling points, we need to know the approximate boiling points of each liquid. Here is the step-by-step solution:

### Step 1: Identify the boiling points of each liquid
- **Coal Tar**: Approximately 300°C to 400°C
- **Fuel Oil**: Approximately 200°C to 300°C
- **Kerosene**: Approximately 150°C to 250°C
- **Petrol (Gasoline)**: Approximately 30°C to 200°C

### Step 2: Compare the boiling points
Now that we have the boiling points, we can compare them:
- Coal Tar has the highest boiling point (300°C to 400°C).
- Fuel Oil follows with a boiling point range of (200°C to 300°C).
- Kerosene comes next with a boiling point range of (150°C to 250°C).
- Petrol has the lowest boiling point (30°C to 200°C).

### Step 3: Arrange in decreasing order
Based on the boiling points identified:
1. **Coal Tar** (highest boiling point)
2. **Fuel Oil**
3. **Kerosene**
4. **Petrol** (lowest boiling point)

### Final Arrangement
Thus, the final arrangement of the liquids in decreasing order of boiling points is:
**Coal Tar > Fuel Oil > Kerosene > Petrol**

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