Hydrocarbons and alkanes Quiz
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5 questions, one answer each
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1. What is crude oil?
- A. A single hydrocarbon
- B. A mixture of many hydrocarbons
- C. An element
- D. A compound of carbon, hydrogen and oxygen
2. What is the molecular formula of nonane, the alkane with 9 carbon atoms?
- A. C₉H₁₈
- B. C₉H₂₂
- C. C₉H₂₀
- D. C₉H₁₆
3. Which equation shows the balanced complete combustion of ethane?
- A. C₂H₆ + 3O₂ → 2CO₂ + 3H₂O
- B. 2C₂H₆ + 5O₂ → 4CO₂ + 6H₂O
- C. C₂H₆ + O₂ → CO₂ + H₂O
- D. 2C₂H₆ + 7O₂ → 4CO₂ + 6H₂O
4. Which fraction has the lowest boiling point?
- A. Bitumen
- B. Refinery gases
- C. Diesel
- D. Kerosene
5. What happens in the column during fractional distillation?
- A. Long chains condense near the cool top and short chains near the hot bottom
- B. All hydrocarbons condense at the same height
- C. Hydrocarbons with long chains condense near the hotter bottom and those with short chains condense near the cooler top
- D. The hydrocarbons are chemically broken down into elements