Combustion and flame

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1. Oxides of sulphur and nitrogen produced by the burning of coal, diesel, and pertol causes .

2. The amount of heat energy produced on complte combustion of 1kg of a fuel is called its .

3. Increased percentage of carbon dioxide gas in the air is responsible for .

4. is produced when the combustible substance vapourises during burning.

5. is expressed in terms of its calorific value.

6. The process of in which large amount of gases are released with tremendous amount of heat and sound is called .

7. substances have very low ignition temperature.

8. The lowest temperature at which a combustible substance fires up is called .

9. zone contains vapours of fuel and unburnt carbon particles.

10. The fuel which does not causes any smoke and burn efficiently is called .