Which two substance are formed when a fuel is burnt?

Fuel is jst burn to produce energy....I think yr question is wrong it shld be "Which two substances are formed by burning of coal on a high temperature in absence of air" ie. Coal tar,ammonical liquid ,coal gas,coke....
Regards
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We are going to be a very nice and operate the kya hai ji please find the attached file is the
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Kerosene and fire
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Kerosin and fire
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Kerosin and fire
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Smoke and clouds
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Kerosin and fire
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The substance which are formed when a fuel is burnt are light and fire
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