How can you say that cutting of paper is a physical change?
What is a chemical change? Give two examples of chemical changes.
3. Give two methods of preventing the rusting of iron.
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8
cutting of paper is a physical change because here the properties of paper didn't change,only the shape changed which is a physical property.
chemical change means in which the chemical property of a substance is changed. example -burning of paper , rusting of iron.
methods to prevent rusting of iron are:-
- by applying grease or paint on the surface of iron
- galvanization
Answered by
4
Cutting. of paper is a physical. change because there no new substance is formed and this is reversible
a chemical change is a change in which a new substance. is formed a chemical change is generally reversible
Example of chemical change
1 curdling of milk
2 rusting of iron
two method to prevent rusting of iron are
1 by painting
2 galvanisation
3 by applying grease or oil
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