Question

Explain rancidity and corrosion??

Answer 1

Corrosion: It is the process in which metals are slowly eaten up by the action of air moisture or chemicals. For example rusting is a form of corrosion in which iron is eaten up by the action of air and moisture and a reddish brown coating of iron oxide is formed as shown in the following chemical reaction.



Rancidity: When the substance containing oils and fats are exposed to air they get oxidised and become rancid due to which their smell, taste and colour change. This process is known as rancidity. For example when a when butter is kept open for a long time then its smell and taste gets changed.


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Answer 2

RANCIDITY:

      It is commonly known as spoilage of food as the food reacts with oxygen the food becomes bad in taste and bad smell.

      Rancidity can be prevented by filling Nitrogen air in packaging foods.

      When butter is kept outside its fat and oxygen get reacted and butter smells and tastes bad.

     

CORROSION:

        It is the gradual destruction in metals by reacting with the atmosphere.

        Mostly it forms metallic oxides.

        Rusting of iron - corrosion.

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