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- 1. Multiple Choice
Which fuels are used for running automobiles?
Wood
Coal
Diesel
Charcoal
- 2. Multiple Choice
When magnesium ribbon burnt it produce
Magnesium hydroxide
Magnesium oxide
Magnesium chloride
Magnesium chloride
- 3. Multiple Choice
Charcoal burns in air producing
Carbon dioxide
Oxygen
Carbon monoxide
Water
- 4. Multiple Choice
Combustion is a reaction in which a Substance reacts with-
Oxygen
Hydrogen
Chlorine
Nitrogen
- 5. Multiple Choice
Fuel may be-
Solid
Liquid
Gas
All
- 6. Multiple Choice
Which of the following is inflammable Substances?
Wood
Paper
Petrol
Metal
- 7. Multiple Choice
In the presence of water, ignition Temperature of paper is-
Increase
Decrease
Remains constant
None of these
- 8. Multiple Choice
Combustion is a-
Physical change
Chemical change
Both the above
No change
- 9. Multiple Choice
Combustion results
Heat
Light
Sound
All the above
- 10. Multiple Choice
The lowest temperature at which a substance catches fire
Critical temperature
Ignition temperature
Freezing temperature
Boiling temperature
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