# A carbonaceous fuel (containing no H2 or hydrocarbons) is burnt and the resulting flue gas contains 21% CO2. It means that _____ ? with Answer - Chemical Engineering Mcqs | TestPrep

> Solved MCQ: A carbonaceous fuel (containing no H2 or hydrocarbons) is burnt and the resulting flue gas contains 21% CO2. It means that _____ ? Correct Answer: C. Complete combustion of fuel has taken place. Verified answer explanation for FPSC, PPSC, MDCAT, NTS, and CSS competitive exam preparation.

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

Direct Answer & Quick Reference

The correct option is **C. Complete combustion of fuel has taken place**.

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 **(Correct Answer)**

D. No excess air has been used for combustion

✨ Explain with AI

Verified Key: C. Complete combustion of fuel has taken place
Solved by 3,143+ students

Verified against official examination board answer keys and standard curriculum textbooks.

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