Which clue can be used to identify a chemical reaction as a combustion reaction? a.) oxygen is a product.
b.) a hydrocarbon reacts with oxygen.
c.) water and carbon dioxide react.
d.) the reaction involves ions.

B.) A hydrocarbon reacts with oxygen.

Explanation:

A combustion reaction is one in which hydrocarbons containing carbon and hydrogen react together and result in the formation of carbon dioxide and water along with production of large amount of energy.

a) Thus oxygen is a reactant as it is on the left side of the arrow.

c) Water and carbon dioxide are formed as products.

d) There are no ions involved.

i just learnt this recently but i need to look through my notes again