Question

The gas evolved during the fermentation of a sugar solution is}

• A. oxygen
• B. carbon monoxide
• C. carbon dioxide
• D. methane

Hint:

Fermentation always produces alcohol + CO\textsubscript{2}—remember this standard reaction.

Answer 1

The Correct Option is C

Concept: Fermentation is the anaerobic breakdown of sugar by yeast, producing alcohol and gas. Step 1:Understand the reaction.
During fermentation: \[ \text{Sugar} \rightarrow \text{Alcohol} + \text{Carbon dioxide} \]
Step 2:Identify the gas evolved.
The gas released is carbon dioxide (CO\textsubscript{2}).
Step 3:Eliminate incorrect options.}

• Oxygen $\rightarrow$ Not produced in fermentation
• Carbon monoxide $\rightarrow$ Not formed
• Methane $\rightarrow$ Produced in anaerobic decay, not fermentation

Final Answer: \[ {\text{carbon dioxide}} \]