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Chemistry µGCSE:

Crude Oil

10 quick questions - for GCSE and iGCSE

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10 minutes maximum! (can you do it in 5?)  
1. Crude oil is a …
  • A.  renewable resource
  • B.  complex organic compound
  • C.  mixture of all organic compounds
  • D.  mixture of hydrocarbons

Crude oil in jar

Glasbruch2007 | CC 3.0

2. Hydrocarbons are molecules containing…….
  • A. …. carbon, hydrogen and oxygen atoms
  • B. …..carbon, hydrogen and oxygen atoms only
  • C. ….. carbon and hydrogen atoms
  • D. …….carbon and hydrogen atoms only
3. Crude oil is separated using the process of …
  • A.  filtration
  • B.  fractional distillation
  • C.  cracking
  • D.  fermentation

 

 

Q4-6 Crude oil is separated into several fractions. From the list given, select the fraction which is …..

 

 

4. ..most flammable?
5. ..used to surface roads?
6. ..used as fuel for cars?

 

7. As hydrocarbon molecules increase in size the boiling point and viscosity change in the following way:

  boiling point viscosity
A increases increases
B increases decreases
C decreases increases
D decreases decreases

 

Q8-10 refer to the process of catalytic cracking of the long chain fractions from crude oil.

 
8. In catalytic cracking long chain alkanes are converted into ….
  • A. … smaller alkanes only
  • B. … smaller alkenes only
  • C. … smaller alkanes and alkenes
  • D. … larger alkanes

9. The conditions for catalytic cracking are …..

  Temperature Catalyst of..
A High (650oC) Alumina or silica
B High (650oC) iron
C Low (100oC) Alumina or silica
D Low (100oC) iron

 

10. The catalytic cracking of decane (C10H22) produces butane (C4H10) and ethene (C2H4) as the only products. The correct equation for this reaction is:

  • A.  C10H22   C4H10 + C2H4
  • B.  C10H22   2C4H10 + C2H4
  • C.  C10H22   C4H10 + 2C2H4
  • D.  C10H22   C4H10 + 3C2H4