Which of the following is an essential condition for a combustion reaction ? a. oxygen is a product b. oxygen is a reactant c. carbon dioxide is a product d. carbon dioxide is a reactant

Option (b) is the correct answer.

Explanation:

A combustion reaction is defined as the reaction in which a substance chemically reacts in the presence of oxygen.

A combustion reaction is always exothermic in nature as heat is released. Also, carbon dioxide and water will be produced in a combustion reaction.

For example,

Therefore, we can conclude that an essential condition for a combustion reaction is that oxygen is a reactant.

we can conclude that the melting point of table salt is above room temperature (it's actually 801 deg c). the melting point of mercury must be below room temperature (- 39 deg c).