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WAEC Chemistry 2015 Paper

Question : 45

Total: 50

A substance responsible for the sour taste of unripe orange is

Solution:

Concept:

The sour taste of unripe fruits is caused by organic acids, which belong to the alkanoic acid family.

Explanation:

Unripe oranges contain citric acid, an organic acid.

These acids contain the carboxyl functional group,

\mathrm{-COOH}

The

\mathrm{-COOH}

group is responsible for the sour taste.

Alkenes, alkanols, and alkanoates do not provide this sour taste.

Answer:

C. Alkanoic acid

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