Fermentation of vegetable matter can produce alcohol as a fuel. This process involves the conversion of sugars present in the vegetable matter into alcohol through the action of microorganisms such as yeast. The alcohol produced can be used as a fuel in various applications.

Here is a detailed explanation of why alcohol can be obtained by fermentation of vegetable matter:

1. Fermentation Process:
- Fermentation is a metabolic process that occurs in the absence of oxygen.
- It involves the conversion of sugars (such as glucose) into alcohol and carbon dioxide by the action of yeast or bacteria.
- Yeast is commonly used in the fermentation process as it can metabolize sugars and produce alcohol as a byproduct.

2. Vegetable Matter:
- Vegetable matter refers to plant-based materials such as fruits, grains, and other plant parts.
- These materials contain sugars that can be utilized by yeast during fermentation.

3. Conversion of Sugar to Alcohol:
- During fermentation, yeast breaks down the sugar molecules present in vegetable matter into simpler compounds.
- The yeast enzymes convert glucose into ethanol (alcohol) and carbon dioxide.
- This conversion process is known as alcoholic fermentation.

4. Types of Alcohol Produced:
- The primary alcohol produced during fermentation is ethanol (ethyl alcohol).
- Ethanol is a versatile fuel that can be used as a substitute for gasoline in certain applications.
- It has a high energy content and can be easily blended with gasoline or used as a standalone fuel.

5. Uses of Alcohol as Fuel:
- Alcohol, particularly ethanol, can be used as a fuel in various applications.
- It is commonly used as a biofuel in vehicles, especially in countries where it is produced from renewable sources such as sugarcane or corn.
- Ethanol can be blended with gasoline to reduce emissions and enhance the octane rating of the fuel.
- It can also be used as a fuel for heating and cooking purposes.

In conclusion, alcohol can be obtained by the fermentation of vegetable matter. This process involves the conversion of sugars present in the vegetable matter into ethanol through the action of yeast. Ethanol can be used as a fuel in various applications, making it an important renewable energy source.