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Q.

Is it true that rusting of iron is a physical change?


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a

True

b

False 

answer is B.

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Detailed Solution

The above statement is false.
Rusting of iron takes place when iron reacts with the atmospheric oxygen to form iron oxide (a reddish brown oxide) on the surface of the iron substance. Since after rusting we get a new product and also the colour change takes place. Hence, rusting is considered as a chemical change.
The corrected statement would be, “Rusting of iron is a chemical change”.
 
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