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Question

Ethanol can be prepared either by fermentation or from ethene.

(a) Explain the term 'fermentation' and give the full structural formula of ethanol.

(b) Give one large-scale use of ethanol.

(c) Name the products formed when ethanol is burnt in excess of air. Give an equation for this reaction.


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Solution

Ethanol is a member of the Alcohol group. The molecular formula of Ethanol is CH3CH2OH.

(a) Fermentation is a metabolic process that uses enzymes to produce chemical changes in organic substrates.

The structural formula of Ethanol is given below:

(b) Ethanol is widely utilized as a solvent in the production of varnishes and perfumes.

(c) When Ethanol is burnt in excess of air, it will produce Carbon dioxide (CO2) and Water (H2O). The reaction is given below:

C2H5OH(l)Ethanol+3O2(g)Oxygen2CO2(g)Carbondioxide+3H2O(l)Water


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