Question

Ethyl alcohol is commercially manufactured from :

• A. bajra
• B. grapes
• C. maize
• D. sugarcane

Answer 1

Answer: (D)

Ethyl alcohol is commercially manufactured from sugarcane. Molasses is the by product of sugar industry. Ethonol is produced by the fermentation of molasses (contains glucose and fructose) by using yeast, Saccharomyces cerevisiae.
$\underset{\text{(Glucose or fructose)}}{C_6{H}_{12}{O}_6}\underset{\text{ (Yeast cell) }}{\overset{\text{ Zymase }}{\to }}\underset{\text{(Ethyl alcohol)}}{2C_2{H}_{5}OH+2C{O}_2}$
Bajra and maize are not used for manufacturing alcohol. Grapes also used for formation of alcohol but not used commercially.