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Answers
Answer:
1. A process by which organic substances such as wood, coal, and oil shale are decomposed by heat in the absence of air and distilled to produce useful products such as coke, charcoal, oils, and gases.
2. the outermost zone is the hottest among all zones and is blue in colour. this is due to complete combustion. the middle zone of flame is moderately hot and is yellow in colour ,partial combustion of fuel takes place here. the innermost zone of flame is least hot and is black in colour.
3. Characteristics of an Ideal Fuel.
It should have a high calorific value and a moderate rate of combustion.
It should not produce any harmful products on burning.
It should cause minimum air pollution.
It should be cheap and readily available.
It should be easy to store, transport and handle
Explanation:
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Explanation:
1).A process by which organic substances such as wood, coal, and oil shale are decomposed by heat in the absence of air and distilled to produce useful products such as coke, charcoal, oils, and gases.
2).the outermost zone is the hottest among all zones and is blue in colour. this is due to complete combustion. the middle zone of flame is moderately hot and is yellow in colour ,partial combustion of fuel takes place here. the innermost zone of flame is least hot and is black in colour.
3).It should have a high calorific value and a moderate rate of combustion.
It should not produce any harmful products on burning.
It should cause minimum air pollution.
It should be cheap and readily available.
It should be easy to store, transport and handle