Question

Burning of coal in air is a:

• A. physical change
• B. chemical change
• C. reversible change
• D. endothermic reaction

Answer 1

Answer: (B)

chemical change

A combustion reaction is when a chemical reacts with oxygen and releases energy.

Fuels are burnt to produce energy when these fuels burn, the atoms in the fuels combine with oxygen from the air to make new molecules, that is the reason why the burning of coal is a non-reversible chemical change.

Coal is burnt mainly from carbon. This burns to produce carbon dioxide.

Hence, option B is correct.