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Question

Statement I: If you leave a piece of iron in the open for a few days, it acquires a film of brownish substance, called rust.

Statement II: Rusting of iron is a chemical change.

A
Both the statements are correct.
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B
Both the statement are incorrect.
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C
Only statement I is correct.
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D
Only statement II is correct.
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Solution

The correct option is A Both the statements are correct.
Corrosion is the gradual degradation of metallic objects in the presence of various substances present in the atmosphere like oxygen, moisture, etc.

On leaving a piece of iron in open it gets corroded. A reddish brown flaky layer (iron oxide) is formed on its surface which is called rust.

Rusting of iron is a chemical change because in this process, a new substance, rust (iron oxide) is formed.

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