Rusting of iron is a chemical change and chemical change is a permanant changes occur but we can remove the rust of iron by coating or painting than how it is a chemical change not a physical change?

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Solution

Rusting of iron is the oxidation of iron in presence of air and moisture.We cannot remove rust by painting but we can prevent rust formation by painting. The amount of iron which is rusted cannot be get back, so rusting of iron is a chemical change.

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So, rusting of iron is a chemical change or physical change???

The rusting of an iron object is called:

(a) corrosion and it is a physical as well as a chemical change

(b) dissolution and it is a physical change

(d) dissolution and it is a chemical change

Rusting of iron is both chemical and physical change . Why?

Rusting of iron is a chemical change.

State whether the following statements are true or false. In case a statement is false, write the corrected statement in your notebook.

(a) Cutting a log of wood into pieces is a chemical change.
(b) Formation of manure from leaves is a physical change
(c) Iron pipes coated with zinc do not get rusted easily.
(d) Iron and rust are the same substances.
(e) Condensation of steam is not a chemical change.

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