At 25o and zymase as catalyst, C6H126 → 2C2H5OH + 2CO2 + energy The reaction above represented by the equation above is useful in the production of

Analysis of the Question

The question asks you to identify the product of the fermentation process represented by the chemical equation: $C_6H_{12}O_6 \xrightarrow{\text{zymase}} 2C_2H_5OH + 2CO_2 + \text{energy}$

Concept Explanation

This reaction is known as alcoholic fermentation. It is a biological process where yeast (which contains the enzyme zymase) breaks down glucose ($C_6H_{12}O_6$) in the absence of oxygen (anaerobic conditions) to produce alcohol and carbon dioxide.

• Glucose ($C_6H_{12}O_6$): The sugar substrate.
• Zymase: The biological catalyst (enzyme) found in yeast.
• $C_2H_5OH$: This is the chemical formula for ethanol (ethyl alcohol).

Step-by-Step Solution

1. Examine the products: The equation explicitly shows the formation of $2C_2H_5OH$.
2. Identify the chemical name: • $CH_3OH$ is Methanol. • $C_2H_5OH$ is Ethanol. • $C_3H_7OH$ is Propanol. • $C_4H_9OH$ is Butanol.
3. Match with options: Since the product is $C_2H_5OH$, it corresponds directly to ethanol.

Conclusion

The reaction is the standard industrial and laboratory method for producing ethanol from glucose. Therefore, the correct option is D.

Exam Tip

When you see the word "zymase" or "yeast" in a Chemistry question, immediately associate it with the production of ethanol. Also, remember that this reaction is the basis for the production of alcoholic beverages and industrial ethanol.