- 1. What do we call the compounds that contain only carbon and hydrogen atoms?
- Carbohydrates Carbohydrogens Hydrocarbons
- 2. Which of the following describes the top of an oil fractionating column?
- It's hotter than the bottom of the column. It's colder than the bottom of the column. It's the same temperature as the bottom of the column.
- 3. What happens to a liquid during its separation from a mixture by distillation?
- Condensing followed by evaporating Evaporating followed by condensing Evaporating followed by freezing
- 4. In comparison with large hydrocarbons, how would you describe small hydrocarbons?
- They are more viscous. They are less flammable. They are more volatile.
- 5. What is the general formula for alkanes?
- CnHn+2 CnH2n+2 CnH2n
- 6. How can alkanes be described?
- They are saturated. They are unsaturated. They are sedimented.
- 7. Which gas is not formed by the combustion of hydrocarbons?
- Oxygen Water vapour Carbon dioxide
- 8. Which of these gases is mainly responsible for acid rain?
- Carbon monoxide Methane Sulfur dioxide
- 9. What is caused by the release of carbon dioxide into the atmosphere?
- Global dimming Global warming Ozone depletion
- 10. What causes global dimming?
- The Sun releasing less energy The Earth moving away from the Sun Particles from burning fuels being released
19 February, 2010
Fuels from crude oil
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