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20.Explain the following terms with one example each.(a) Corrosion(b) Rancidity |
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Answer» a)Corrosion: It is the process of degradation of material on continuous interaction with atmosphere. Because of Corrosion the strength of the material decreases Ex:The materials like water pipes which are made up of metal continuously exposed to moist atmosphere will get corrode and over the time water starts leaking.The bottom layer of the boats or ships get corrode, so for every fixed period of time they will get replaced by new materials.Rusting of some of the materials in our house items. b)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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