Alkanes as fuels and pollution Quiz
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5 questions, one answer each
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1. Which is the molecular formula of an alkane?
- A. C₅H₁₀
- B. C₅H₁₂
- C. C₅H₈
- D. C₅H₁₄
2. What is the purpose of reforming in a refinery?
- A. To split long chains into short alkanes and alkenes
- B. To separate crude oil by boiling point
- C. To make branched-chain and cyclic hydrocarbons that burn more efficiently
- D. To remove sulfur from crude oil
3. Which pollutant forms because nitrogen from the air reacts at high temperature in an engine?
- A. Carbon monoxide
- B. Nitrogen oxides
- C. Carbon particulates
- D. Unburned hydrocarbons
4. What is the equation for the main reaction that takes place in a catalytic converter?
- A. CO + O₂ → CO₂
- B. N₂ + O₂ → 2NO
- C. 2CO + 2NO → 2CO₂ + N₂
- D. C₈H₁₈ → C₄H₁₀ + C₄H₈
5. A student claims that bioethanol is carbon neutral. Which is the best evaluation?
- A. Correct, because it produces no carbon dioxide when burned
- B. Wrong, because it is made from crude oil
- C. Largely correct, because plants absorb carbon dioxide as they grow, but energy for growing and processing the crop reduces the benefit
- D. Wrong, because ethanol is a fossil fuel