why do particles of iron when placed in the moist air get covered with reddish-brown powdery substance? Is this process a physical or chemical change ? give reason to support your answer
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why do particles of iron when placed in the moist air get covered with reddish-brown powdery substance? Is this process a physical or chemical change ? give reason to support your answer
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Explanation:
The upper layer of iron reacts with water and oxygen present in the air in the form of moisture and forms a reddish-brown powder which is hydrated iron oxide commonly known as rust. It is a chemical change because we cannot get back iron from the rusted iron.
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Answer:
Articles made of iron when placed in moist air get covered with a reddish-brown powder called rust. The upper layer of iron reacts with water and oxygen present in the air in the form of moisture and forms a reddish-brown powder which is hydrated iron oxide commonly known as rust. It is a chemical change because we cannot get back iron from the rusted iron.
Explanation:
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