Question

Explain the following terms with an example each in brief.

(a) Corrosion
(b) Rancidity

Please I want an appropriate answer. Not a copied answer from Google.​

Answer 1

Answer:

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Answer 2

(a) Corrosion:-

—> It is a process of deterioration of a metal as a result of its reaction with air or water present in environment. Therefore, when metals are exposed to atmosphere, they react with air or water present in the environment and form undesirable compounds on their surfaces. This process is called corrosion. Almost all metals except noble metals such as gold, platinum get corroded.For example, when iron is exposed to moisture for a long time, its surface acquires a brown flaky substance called rust. Similarly, surface of copper acquires a green coating of basic copper carbonate, silver tarnishes, etc.

(b) Rancidity:-

—> When fats and oils are exposed to air, they get oxidized and become rancid and their smell and colour change. This phenomenon is called rancidity. To prevent rancidity of food materials containing fats and oils, certain substances (called antioxidants) are added which prevent oxidation and hence rancidity. Some food materials are stored in air tight containers or the bags containing the food materials (such as chips) are flushed with invert gas such as nitrogen to prevent them from getting oxidized.