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Preview questions
1. What is combustion?
A chemical reaction with oxygen · A physical change · A type of flame · A state of matter
2. What is required for combustion to occur?
Water · Oxygen · Carbon dioxide · Nitrogen
3. Which of the following is a fuel?
Water · Oxygen · Wood · Carbon dioxide
4. What is the main product of combustion of hydrocarbons?
Oxygen · Carbon monoxide · Carbon dioxide · Hydrogen
5. What type of flame is produced by complete combustion?
Yellow flame · Blue flame · Red flame · Green flame
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