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प्रश्न
How is ethanol manufactured from sugarcane?
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उत्तर
The fermentation method can be used to obtain ethanol from sugarcane. Actually, in industries, C2H5OH is prepared by the fermentation of molasses, which is a by-product obtained during the manufacture of sugar from sugarcane.
It is converted into ethanol by the following steps:
- Dilution of molasses
- Addition of nitrogen source
- Addition of yeast
- Distillation of wash.
Chemical Reductions:
\[\ce{\underset{\text{Sugar}}{C12H22O11} + H2O->[Invertase]\underset{\text{Glucose}}{C6H12O6} + \underset{\text{Fructose}}{C6H12O6}}\]
\[\ce{\underset{\text{Glucose or Fructose}}{C6H12O6}->[Zymase]\underset{\text{Ethanol}}{2C2H5OH} + 2CO2}\]
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संबंधित प्रश्न
Name the compound formed when ethanol is heated in excess of conc. sulphuric acid at 443 K. Also, write the chemical equation of the reaction stating the role of conc. sulphuric acid in it. What would happen if hydrogen is added to the product of this reaction in the presence of a catalyst such as palladium or nickel?
Give one exampleof the compound having the following functional group:
Alcohol group
State two used of ethanol (other than as a fuel).
What is meant by denatured alcohol? What is the need to denature alcohol?
When ethanol is heated with concentrated sulphuric acid at 170°C, it gets converted into ethene. In this reaction, concentrated sulphuric acid acts as:
(a) oxidising agent
(b) catalyst
(c) dehydrating agent
(d) reducing agent
Name the product formed when ethanol reacts with acetic acid. Give an equation. What is the name given to this type of reaction?
From the given list, name the compound with –COOH as part of its structure.
From the given list, name the homologue of the homologous series with the general formula CnH2n.
Write the equation for the following lab preparation:
Methanol from iodomethane.
Write the structural formulae of the following compound:
Ethane
