Question

Among the following, which gas can be used as a fuel in the digesting process?

• A. $C{O}_2$
• B. $C{H}_4$
• C. $O_2$
• D. $NO$

Answer 1

The correct option is B $C{H}_4$

$\begin{array}{c}\text{In anaerobic digestion, when microorganisms break down}\\ \text{organic materials in absence of oxygen then}\\ \text{gases like}{CH}_4\text{(methane) and}{CO}_2\text{(carbon dioxide) are released.}\\ \text{But, aerobic digestion involves consumption of}O{}_2\text{and hence}\\ \text{is used as a vital fuel during digestion.}\end{array}$