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

The question focuses on identifying the gas released during the fermentation of a sugar solution. To determine this, we consider the nature of the fermentation process.

Fermentation is a process carried out by microorganisms such as yeast, in which sugars are broken down in the absence of oxygen to form alcohol and a gaseous byproduct. The reaction can be represented as:

C_6H_{12}O_6 \rightarrow 2 \ C_2H_5OH + 2 \ CO_2

This shows that carbon dioxide (CO_2) is released along with ethanol. Now, consider the given options:

• Oxygen: Not formed, as the process occurs without oxygen.
• Carbon Monoxide: Not produced in this biological reaction.
• Carbon Dioxide: Produced as a gaseous byproduct.
• Methane: Not associated with standard sugar fermentation.

Hence, the gas evolved during fermentation is carbon dioxide.