(a) Give the name of the: (i) process for obtaining ethanol from sugars; (ii) compound produced when ethanol undergoes bacterial oxidation. (iii) enzyme in ...

Assessment: WAEC SSCE - Chemistry - 1996 (Essay) Subject: Chemistry

Question 1 Report

(a) Give the name of the:

(i) process for obtaining ethanol from sugars;

(ii) compound produced when ethanol undergoes bacterial oxidation.

(iii) enzyme in yeast which catalyses the conversion of maltose to glucose.

 

(b)(i) Write the structural formula of ethanol

(ii) Name the organic product formed when propanoic acid reacts with ethanol.

Answer Details

(a)(i) The process for obtaining ethanol from sugars is fermentation.

(ii) When ethanol undergoes bacterial oxidation, the compound produced is ethanoic acid (acetic acid), \(CH_3COOH\).

(iii) The enzyme in yeast which catalyses the conversion of maltose to glucose is maltase.

(b)(i) Structural formula of ethanol:

\[CH_3-CH_2-OH\]

showing the hydroxyl \(-OH\) group attached to the terminal carbon.

(ii) When propanoic acid reacts with ethanol (esterification), the organic product is the ester ethyl propanoate, \(CH_3CH_2COOC_2H_5\).

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