Question

Rusting of an article made up of iron is called
(a) corrosion and it is a physical as well as chemical change
(b) dissolution and it is a physical change
(c) corrosion and it is a chemical change
(d) dissolution and it is a chemical change

Answer 1

Answer:

a

Explanation:

corrosion causes a brown layer on the iron article which is a physical change and the deposition of iron oxide ( iron reacts with the oxygen from air ) which is a chemical change .

Answer 2

Option C) corrosion and is a chemical change.

Corrosion is the term used to describe the rusting of iron. During corrosion, iron turns into iron oxide, which is an example of a chemical change.

This sounds good the way it is:

• Because rust is a chemical molecule termed hydrated iron oxide Fe2O3. nH2O, iron(III), which is distinct from elemental iron, rusting of iron is corrosion and it is a chemical transformation.

4Fe + 3O2 → Fe2O3. nH2O

• Chemical modifications are those in which the identity of the original substance is altered and cannot be recovered.
• Physical modifications are those in which a substance's identity is not altered and it is still capable of returning to its initial state.
• Additionally, the iron's surface color changes.

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