Question

List 5 example in detail to show the harmful effects of oxidation reaction in every day life or food industry.
Write preventive measures also.​

Answer 1

Answer:

Have you ever observed a green coating on coins or statues made of copper? Why does this happen? This happens because the metal undergoes a process called corrosion. Also, have you observed a bad smell emanating from food containing fats or oils? This process is called rancidity. Both these processes are everyday examples of oxidation reactions. Let’s understand why and how both these processes take place.

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Corrosion

It is a process where metals are attacked by moisture, acids etc. Some daily examples of corrosion that you may have observed are the black coating that develops on articles made of silver or the green coating on copper articles. Corrosion that occurs on materials made of iron is ‘rusting‘.

Answer 2

Answer:

Effects of oxidation Reaction in Everyday Life | Chemical ...

(1) Rancidity of food Rancidity of food can be prevented by:

(1) Adding Anit-Oxidants to food containing fats and oils.

(2) By packing fat and oil containing food in nitrogen gas.

(3) By keeping food in refrigerator.

EFFECTS OF OXIDATION REACTIONS IN EVERYDAY LIFE

Oxidation has a damaging effect on metals as well as on food.

There are two common effects of oxidation reactions that we observe in daily life.

Corrosion of metals

Rancidity of food.

CORROSION

When a metal is attacked by substances around it such as moisture, acids, etc., it is said to corrode and this process is called corrosion.

-Rusting of iron metal is the most common form of corrosion

-Iron articles are shiny when new, but get coated with a reddish-brown powder when left for some time.

-Iron metal is oxidized by the oxygen of air in the presence of water (moisture) to form hydrated iron (III) oxide called rust :

4Fe + 3O2 + 2xH2O →2Fe2O3.xH2O

-The black coating on silver and the green coating on copper are some examples of corrosion.

-Corrosion causes damage to car bodies, bridges, iron railings, ships, and to all objects made of metals, especially those of iron.

-Coating metal surface with paint or enamel provides a barrier between the metal and the moisture in the environment.

-The process of coating a metal surface with another metal that is more likely to be oxidized is referred to as sacrificial coating.

Explanation:

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