(4) Formation of carbon di-oxide gas by combustion of coal in air is a..........
reaction.
(A) chemical reaction
(B) exothermic reaction
(C)phisical reaction
(D)endothermic reaction
Answers
Answered by
1
Answer:
(A) Chemical reaction
Answered by
2
Answer:
option A is coreect
Explanation:
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 A is correct.
Similar questions