Which fraction is collected last in the fractional distillation of crude oil?

Unlock all questions

This demo includes only 20 questions. Upgrade to access hundreds of questions, flashcards, exam simulations, and disable ads.

Full question bankExam simulationsFlashcards
From $24.99Unlock all

Study for the IGCSE Edexcel Chemistry Test. Access flashcards and multiple choice questions with hints and explanations. Get ready for your exam!

Multiple Choice

Which fraction is collected last in the fractional distillation of crude oil?

Explanation:
In fractional distillation, the column separates components by boiling point: lighter, low-boiling fractions rise higher and condense near the top, while heavier, high-boiling fractions condense lower down. Bitumen has by far the highest boiling point and is too heavy to vaporize under the column conditions, so it remains as the bottom residue and is collected last. The other fractions—kerosene, diesel, and fuel oil—have lower boiling points and vaporize earlier, condensing higher up in the column.

In fractional distillation, the column separates components by boiling point: lighter, low-boiling fractions rise higher and condense near the top, while heavier, high-boiling fractions condense lower down. Bitumen has by far the highest boiling point and is too heavy to vaporize under the column conditions, so it remains as the bottom residue and is collected last. The other fractions—kerosene, diesel, and fuel oil—have lower boiling points and vaporize earlier, condensing higher up in the column.

More Multiple Choice Questions
Subscribe

Get the latest from Examzify

You can unsubscribe at any time. Read our privacy policy