Question

burning of coal and rusting of iron these are considered as chemical reactions explain​

Answer 1

Answer:

• Burning of coal and rusting of iron is considered as chemical reactions because it changes the chemical composition of these materials.

Explanation:

• Coal, which is a fossil fuel is chemically a carbon compound and when it is burned in air the process is called as combustion.

• In the process of combustion, the carbon compound ( coal) reacts with oxygen ( burning in air) carbon dioxide and water vapour is produced.

• These process is not reversible which means that the products of the reaction cannot be formed back to reactants, also the chemical composition changes therefore, burning of coal is a chemical reaction.

• Similarly, in case of rusting of iron the iron reacts with moisture, that is the water molecules to form rust, which is chemically ferric oxide.

• There is change in chemical properties and also chemical composition, thertherefore, the rusting of iron is termed as chemical reaction.