Question

Name an acid used

(a) to preserve food.

Answer 1

An acid is a substance in which the only positive ion is hydrogen. For example, Sulfuric acid $\left({\mathrm{H}}_2{\mathrm{SO}}_4\right)$ and Hydrochloride acid $\left(\mathrm{HCl}\right)$.

Since, many bacteria cannot thrive in an acidic environment, Citric acid $\left({\mathrm{C}}_6{\mathrm{H}}_8{\mathrm{O}}_7\right)$ is commonly used to preserve jams, jellies, and some other foods.

Therefore, citric acid is utilized for the preservation of food.