Order of Appearance of Products during the Refining of Crude Oil

Introduction:
During the refining of crude oil, various products are obtained by separating the different components based on their boiling points. The order of appearance of these products depends on the temperature at which they boil. In this question, we are given the options and we need to determine the correct order of appearance of the products with increasing temperature.

Explanation:

Option a) Kerosene, gasoline, diesel:
- Kerosene has a higher boiling point than gasoline and diesel, so it should appear later in the refining process.
- Gasoline has a lower boiling point than kerosene but a higher boiling point than diesel, so it should appear in between kerosene and diesel.
- Diesel has a lower boiling point than both kerosene and gasoline, so it should appear first in the refining process.
- Therefore, option a) is not the correct answer.

Option b) Diesel, gasoline, kerosene:
- Diesel has a lower boiling point than both gasoline and kerosene, so it should appear first in the refining process.
- Gasoline has a higher boiling point than diesel but a lower boiling point than kerosene, so it should appear in between diesel and kerosene.
- Kerosene has a higher boiling point than both diesel and gasoline, so it should appear last in the refining process.
- Therefore, option b) is not the correct answer.

Option c) Gasoline, kerosene, diesel:
- Gasoline has a lower boiling point than both kerosene and diesel, so it should appear first in the refining process.
- Kerosene has a higher boiling point than gasoline but a lower boiling point than diesel, so it should appear in between gasoline and diesel.
- Diesel has a higher boiling point than both gasoline and kerosene, so it should appear last in the refining process.
- Therefore, option c) is the correct answer.

Option d) Gasoline, diesel, kerosene:
- Gasoline has a lower boiling point than both diesel and kerosene, so it should appear first in the refining process.
- Diesel has a higher boiling point than gasoline but a lower boiling point than kerosene, so it should appear in between gasoline and kerosene.
- Kerosene has a higher boiling point than both gasoline and diesel, so it should appear last in the refining process.
- Therefore, option d) is not the correct answer.

Conclusion:
The correct order of appearance of the products with increasing temperature during the refining of crude oil is gasoline, kerosene, diesel. This means that gasoline appears first, followed by kerosene, and finally diesel.