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- 1. Multiple Choice
What is produced in complete combustion of a fuel?
Carbon
Carbon monoxide
Carbon monoxide and water
Carbon dioxide and water
- 2. Fill in the Blank
During incomplete combustion, a toxic gas called _________is produced (give the name).
- 3. Multiple Choice
What environmental problem is caused by carbon dioxide?
Greenhouse effect
Acid rain
Breathing problems
Smog
- 4. Fill in the Blank
The test for carbon dioxide gas is to bubble it through _____________.
- 5. Fill in the Blank
For any fuel to burn, there must be a supply of ___________ gas.
- 6. Multiple Choice
Why does incomplete combustion happen?
Because there isn't enough oxygen
Because there isn't enough carbon dioxide
Because there isn't enough fuel
Because carbon is made
- 7. Multiple Choice
Which one of the following is combustible?
Iron nail
Glass
Stone pieces
Paper
- 8. Multiple Choice
Which is the hottest part in the candle flame?
Yellow
Wax part
Black
Blue
- 9. Multiple Choice
Fuel may be
Solid
Liquid
Gas
All of the three
- 10. Multiple Choice
In this chemical reaction, which is the product/s?
Magnesium + Oxygen --> Magnesium oxide
magnesium
magnesium and oxygen
magnesium oxide
oxygen
- 11. Multiple Choice
Three things that are needed for combustion are:
oxygen, nitrogen and carbon dioxide
fuel, oxygen and carbon dioxide
fuel, heat and oxygen
fuel, heat and carbon dioxide
- 12. Multiple Choice
Hydrocarbons are fuels containing only:
carbon and oxygen
carbon and hydrogen
carbon dioxide and hydrogen
hydrogen and nitrogen
- 13. Multiple ChoiceWhich of the following defines oxidation?A chemical reaction where a substance gains oxygen.A chemical reaction where a substance loses oxygen.A chemical reaction where a substance loses a metal.A chemical reaction where a substance gains a metal.
- 14. Multiple Choice
In a word equation, the starting chemicals are called...
reactants
products
ingredients
- 15. Multiple Choice
Do we need greenhouse gases on Earth?
Yes - they keep the Earth warm
Yes - they block dangerous UV light from the sun
No - they only cause terrible climate change
No - they only block some of the Sun's rays
- 16. Multiple ChoiceDust, ash and pollen are examples of this air pollutantLeadGround-level ozoneParticulate matterNitrogen oxides
- 17. Multiple Choice
Which of these causes the release of carbon monoxide?
Burning fossil fuels containing impurities
Burning fossil fuels with sufficient oxygen
Burning fossil fuels with insufficient oxygen
Burning petrol only
- 18. Multiple Choice
Which environmental problem is caused by the release of particulates into the atmosphere?
Global warming
Global dimming
Acid rain
Depletion of the ozone layer
- 19. Multiple Choice
We can reduce the occurrence of acid rain by...
Removing sulfur from fuels before they are burned
Making sure there is enough oxygen to burn the fuel completely
Removing sulfur dioxide from waste gases before they are returned to the air
Using renewable energy sources
- 20. Multiple Choice
Which of these is not a way of limiting global warming?
Individuals reducing their energy usage
Switching to renewable energy sources
Ensuring fuels are burnt with sufficient oxygen, so incomplete combustion does not occur.
Switching to hydrogen fuel
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