MCQ practice · SSC Chemistry Board questions · Chapter 11: Mineral Resources: Fossils
Which fraction separates at 21°C-70°C in the fractional distillation of petroleum?
Think it through first, then pick an option.
- a diesel
- b kerosene
- c naphtha
- d gasoline
Answer and explanation
Correct answer: d gasoline
Petrol or gasoline boils between 21°C and 70°C.
Why the other options are wrong
- a diesel: Diesel separates at 171-270°C; gasoline comes off at 21-70°C.
- b kerosene: Kerosene separates at 121-170°C; gasoline comes off at 21-70°C.
- c naphtha: Naphtha separates at 71-120°C; gasoline comes off at 21-70°C.
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