Question

Explain the following terms with examples: corrosion & rancidity

Answer 1

Answer:

Corrosion: The most common example of corrosion is rusting that is corrosion of iron. When an iron article remains exposed to moist air for a long time its surface is covered with a brown flaky substance called rust.

Example:

$2Fe+\frac{3}{2} 0_{2} +xH_{2} O$⇒$Fe_{2}O_{3} .xH_{2}O$

Rancidity:

The oxidation of oils or fats in food resulting into a bad smell and bad taste is called Rancidity. We have often noticed that food containing oil or fat, if left for a long time develops a bad taste and bad smell. This is because of the oils and fat present in food get oxidized.

Example:

when a chips pack is exposed to atmospheric air which results in a change in taste and odor.