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Alkanes and the fractions of crude oil

9th grade (Year 10 in England) · 11 questions · Common Core: NGSS.HS-PS1-1, NGSS.HS-ESS3-2 · England: GCSE Combined Science: Organic chemistry

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  1. Question 1

    How does fractional distillation separate crude oil?

    • A. The oil is frozen in layers
    • B. Hydrocarbons condense at different heights of a column depending on their boiling points
    • C. A magnet pulls out each fraction
    • D. Each fraction is filtered out

  2. Question 2

    Alkanes have the general formula CₙH₂ₙ₊₂. How many hydrogen atoms are in an alkane with 12 carbon atoms?

    Answer

  3. Question 3

    Which fraction is the most flammable?

    • A. heavy fuel oil
    • B. diesel oil
    • C. refinery gases (shortest chains)
    • D. bitumen

  4. Question 4

    Alkanes have the general formula CₙH₂ₙ₊₂. How many hydrogen atoms are in an alkane with 9 carbon atoms?

    Answer

  5. Question 5

    Which fraction is the most flammable?

    • A. heavy fuel oil
    • B. bitumen
    • C. diesel oil
    • D. refinery gases (shortest chains)

  6. Question 6

    Alkanes have the general formula CₙH₂ₙ₊₂. How many hydrogen atoms are in an alkane with 1 carbon atom?

    Answer

  7. Question 7

    Why is crude oil called a finite (non-renewable) resource?

    • A. It is made from sunlight each day
    • B. It formed over millions of years and is used much faster than it forms
    • C. It never runs out
    • D. It is made in factories

  8. Question 8

    Alkanes have the general formula CₙH₂ₙ₊₂. How many hydrogen atoms are in an alkane with 2 carbon atoms?

    Answer

  9. Question 9

    How does fractional distillation separate crude oil?

    • A. The oil is frozen in layers
    • B. Each fraction is filtered out
    • C. A magnet pulls out each fraction
    • D. Hydrocarbons condense at different heights of a column depending on their boiling points

  10. Question 10

    What is the molecular formula of hexane, the alkane with 6 carbon atoms?

    • A. C₆H₁₄
    • B. C₇H₁₄
    • C. C₆H₈
    • D. C₆H₁₃

  11. Question 11

    Why is crude oil called a finite (non-renewable) resource?

    • A. It formed over millions of years and is used much faster than it forms
    • B. It never runs out
    • C. It is made from sunlight each day
    • D. It is made in factories

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  1. Hydrocarbons condense at different heights of a column depending on their boiling points
  2. 26
  3. refinery gases (shortest chains)
  4. 20
  5. refinery gases (shortest chains)
  6. 4
  7. It formed over millions of years and is used much faster than it forms
  8. 6
  9. Hydrocarbons condense at different heights of a column depending on their boiling points
  10. C₆H₁₄
  11. It formed over millions of years and is used much faster than it forms