A carbonaceous fuel (containing no H₂ or hydrocarbons) is burnt and the resulting flue gas contains 21% CO₂. It means that Options: A . &nbsp21% excess air has been used for combustion B . &nbsp21% excess oxygen has been used for combustion C . &nbspComplete combustion of fuel has taken place D . &nbspNo excess air has been used for combustion

A carbonaceous fuel (containing no H₂ or hydrocarbons) is burnt and the result

Question

A carbonaceous fuel (containing no H₂ or hydrocarbons) is burnt and the resulting flue gas contains 21% CO₂. It means that

Options:

A . 21% excess air has been used for combustion

B . 21% excess oxygen has been used for combustion

C . Complete combustion of fuel has taken place

D . No excess air has been used for combustion

Answer: Option C

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