Alcohol

Alcohol is a volatile and colorless liquid with an ethernal odour. It is obtained through the fermentation of a sugar containing liquid. Ethyl alcohol is the best known alcohol and is the principle alcohol found in all alcoholic beverage.

Alcohol is obtained by :-

1. Fermentation
Fermentation is the action of yeast upon sugar in fruit or in grain which converts it into alcohol.
(or)
Fermentation is the process in which sugar in food or grain is converted into alcohol by the action of yeast. Carbon dioxide, a bi-product, is retained for fizzy drinks like beer and champagne or released as in still wines. Beverages like beer, wine, cider, perry, etc are obtained by this process. 
2. Distillation
It is the process of obtaining alcohol by heating fermented mass of food or grain in an enclosed container. When the fermented mass is heated to 78.5oC, the alcohol evaporates and is condensed by cooling. Pure alcohol [Grain Natural Spirit (GNS)] is obtained from this process. Pure alcohol has no color or taste or smell and is used in fortifying other beverages. Pure alcohol is blending with flavoring agents, coloring agents and water to get desired drinks. Beverages like Whisky, Rum, Vodka, Gin, etc are made by distillation process.