Question

#1: What is usually released in a combustion reaction?

A. energy

B. elemental oxygen

C. a carbon-based fuel

D. elemental carbon

**my answer; A. energy

is that right?,

Answer 1

A combustion reaction is when a substance reacts with oxygen and releases energy in the form of light and heat. A combustion reaction will always includes a hydrocarbon and oxygen as the reactants and always produces carbon dioxide and water as products. Therefore your answer of A is correct.