Question

In a fermentation tank, molasses solution is mixed with yeast enzymes. After three days alcohol was observed. The speed of the reaction in this case is:

• A. slow
• B. medium
• C. fast
• D. very fast

Answer 1

The correct option is A slow

The maximum concentration of alcohol possible through a natural fermentation is about $12\%$ ethanol,

after this the alcohol concentration fatal for yeast and it can't survive, that's why after some time the speed of the reaction is slow.