100 ml of each of the following substances are simultaneously heated on separate Bunsen burners.
kerosene, lubricating oil, diese, gasoline
Which of the above four substances will vaporise first?

Options

A. Diesel
B. Gasoline
C. Kerosene
D. Lubricating oil

Answer

To determine which substance will vaporize first among kerosene, lubricating oil, diesel, and gasoline when heated, we need to consider the boiling points of each substance. The substance with the lowest boiling point will vaporize first.

### Step-by-Step Solution:

1. **Identify the Substances**: We have four substances: kerosene, lubricating oil, diesel, and gasoline.

2. **Research the Boiling Points**:
- **Gasoline**: The boiling point of gasoline is approximately 40 to 110 degrees Celsius.
- **Kerosene**: The boiling point of kerosene is around 180 to 260 degrees Celsius.
- **Diesel**: The boiling point of diesel is approximately 260 to 320 degrees Celsius.
- **Lubricating Oil**: The boiling point of lubricating oil is generally above 300 degrees Celsius.

3. **Compare the Boiling Points**:
- Gasoline (40-110 °C) has the lowest boiling point.
- Kerosene (180-260 °C) has a higher boiling point than gasoline but lower than diesel and lubricating oil.
- Diesel (260-320 °C) has a higher boiling point than kerosene.
- Lubricating oil (above 300 °C) has the highest boiling point.

4. **Determine the Order of Vaporization**: Based on the boiling points, the order from lowest to highest boiling point is:
- Gasoline < Kerosene < Diesel < Lubricating Oil

5. **Conclusion**: Since gasoline has the lowest boiling point, it will vaporize first when heated.

### Final Answer:
**Gasoline will vaporize first.**

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