Combustion and flame
Across
- 6. dry powder of chemical is used in fire extinguisher.
- 8. a temperature at which substances catches fire is called.
- 9. zone unburnt carbon particle are present.
- 11. most corrosive gas
Down
- 1. caused by increased concentrate of carbon dioxide.
- 2. amount of energy produced on complete combustion of 1 kg of fuel.
- 3. substance which catches fire at very low temperature
- 4. used for fire extinguish due to electricity or oil.
- 5. a chemical process in which a substance reacts with oxygen to give off heat.
- 7. rain oxides of sulphur and nitrogen dissolves in rainwater to produce.
- 10. non metal which catches fire if exposed to air.