Question

2. Give an example to show how an undesirable change can be prevented.
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Answer 1

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Undesirable Change:-

Those changes which we do not want to take place are called undesirable changes.

Ex:- Rusting of Iron, Soaring of milk, etc...

Why Prevention of undesirable changes?

• See, first of all they are many ways in preventing undesirable changes.
• These changes should be prevented because these are not benificial.

Example:-

With example we can learn many preventing methods..

• To prevent rusting of iron we can coat it by zinc and also we can paint on the iron surface.
• To prevent oxidation of foods we should add some chemical preservatives in it and we can also pack them in air tight containers.