GK
GENERAL SCIENCE
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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an element
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a compound
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a mixture of iron and dust
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a mixture of iron, oxygen and water
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Detailed explanation-1: -The correct answer is a compound. It is the common name for a very common compound, iron oxide.
Detailed explanation-2: -Reason: Rust is another name for iron oxide which occurs when iron is exposed to oxygen and moisture for a long period of time. Overtime the oxygen combines with the metal at atomic level forming a compound called an oxide. Rust forms when iron undergoes oxidation. The main catalyst for the rusting process is water.
Detailed explanation-3: -Iron when exposed to moist air forms a reddish brown layer of iron oxide, which is known as rust.
Detailed explanation-4: -Rusting of iron is corrosion of iron. Rusting of iron takes place when iron corrodes in the presence of water and oxygen. It is a redox reaction whereby oxygen acts as an oxidising agent while iron acts as a reducing agent.