2935. A carbonaceous fuel (containing no H₂ or hydrocarbons) is burnt and the resulting flue gas contains 21% CO₂. It means that

21% excess air has been used for combustion
21% excess oxygen has been used for combustion
Complete combustion of fuel has taken place
No excess air has been used for combustion
✅ The correct answer is option C.

Leave a Comment

Your email address will not be published. Required fields are marked *

Scroll to Top