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WAEC Chemistry 2019 Paper

Question : 26

Total: 50

Which of the following compounds is formed by the oxidation of ethanol?

Solution:

Concept:

Oxidation of a primary alcohol like ethanol gives a carboxylic acid.

Explanation:

Ethanol is

\mathrm{C_2H_5OH}

When oxidised by acidified potassium dichromate,

\mathrm{K_2Cr_2O_7}

, ethanol is converted into ethanoic acid.

The product ethanoic acid has the formula

\mathrm{CH_3COOH}

Among the given options,

\mathrm{CH_3CO_2H}

represents ethanoic acid.

Hence, the compound formed is

\mathrm{CH_3CO_2H}

Answer:

\mathrm{CH_3CO_2H}

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