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Q.

Rusting of Iron is a _________change.

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a

Chemical Change

b

Periodic change

c

Physical Change

d

Biological Change

answer is B.

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Detailed Solution

The change in which the molecular composition is completely altered and a new product is formed is called a chemical change.

During corrosion, metal iron degrades and a new layer of ferric oxide is formed on the surface of the iron.  A new product is formed and molecular composition is also altered in this process so it is a chemical change.

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