Question

Combustion is the chemical union of the oxygen in the air with combustible elements that consists of:

a) Hydrogen and Nitrogen
b) Carbon and Oxygen
c) Sodium and Chlorine
d) Helium and Argon

Answer 1

b) Carbon and Oxygen. Combustion is a chemical reaction that occurs when a substance reacts with oxygen gas, releasing energy in the form of light and heat. It usually involves carbon and hydrogen,

Step-by-step explanation:

Combustion is a chemical reaction that occurs when a substance reacts with oxygen gas, releasing energy in the form of light and heat. It is a type of redox reaction in which a reactant combines with oxygen to produce oxides of other elements as products. Usually, combustion reactions involve carbon and hydrogen, resulting in the formation of carbon dioxide, water, flame, and heat.

For example, the combustion of methane (CH4) can be represented as:

CH4 + 2O2 → CO2 + 2H2O + heat

So, the correct answer is b) Carbon and Oxygen. These elements are commonly found in combustible substances and are involved in combustion reactions.