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• A.  renewable resource
• B.  complex organic compound
• C.  mixture of all organic compounds
• D.  mixture of hydrocarbons

• A. ...carbon, hydrogen and oxygen atoms
• B. ...carbon, hydrogen and oxygen atoms only
• C. ...carbon and hydrogen atoms
• D. ...carbon and hydrogen atoms only

• 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 ...

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

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

• A. ...smaller alkanes only
• B. ...smaller alkenes only
• C. ...smaller alkanes and alkenes
• D. ...larger alkanes

9. The conditions for catalytic cracking are ...

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