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JAMB Chemistry 2019 Paper

Question : 38

Total: 80

Which of the following describes the chemical property of acids?

Solution:

Concept:

Acids react with metal carbonates to produce salt, water, and carbon dioxide.

Explanation:

An acid reacts with a carbonate according to the general equation:

\text{Acid} + \mathrm{X}_n\mathrm{CO}_3 \rightarrow \mathrm{Salt} + \mathrm{H}_2\mathrm{O} + \mathrm{CO}_2

Option B wrongly gives

\mathrm{NH}_3

instead of

\mathrm{CO}_2

Option C wrongly gives

\mathrm{CO}_2

from an acid–base reaction.

Thus, the correct description is option D.

Answer:

D. Acid +

\mathrm{X}_n\mathrm{CO}_3 \rightarrow \mathrm{Salt} + \mathrm{H}_2\mathrm{O} + \mathrm{CO}_2

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