12. Oxygen and iron combine chemically to form rust. Rust is classified as which of the following? *
1 point
(a)an atom.
(b)an element.
(c)a compound.
(d)a mixture.
Answers
Answer:
Rust is classified as a compound. So, option C is correct.
Explanation:
Rust : Rust is a chemical compound formed by the reaction on the surface of the iron in the presence of oxygen and moisture. Iron after reacting with Iron forms Iron oxide. Rusting of Iron is called corrosion. It is reddish brown in colour.
The chemical formula of corrosion is (Fe2O. 3· nH2O). Rusting is prevented by galvanisation, coating, cathode protection etc. Since, a chemical bond is formed between the iron, moisture and oxygen and these constituents have definite composition , rust is a compound.
So, the correct option is C.
Answer:
(d) a mixture.
Explanation:
Rusting is an oxidation reaction. The iron reacts with water and oxygen to form hydrated iron(III) oxide, which we see as rust. Iron and steel rust when they come into contact with water and oxygen – both are needed for rusting to occur. so an mixture