What type of chemical reaction is this C10H8 + 12 O2 ---> 10 CO2 + 4 H2O?

When oxygen is used as the reactant, and it merges with reactants, which produces carbon dioxide and water, it is called combustion. Combustion is a high temperature exothermic redux chemical reaction between a fuel and an oxidant. It is often a sequence of elementary reactions.

It is any process in which a substance combines with oxygen to produce heat and light. C10H8+ 1202 10 CO2+4 H2O is the burning of naphthalene. This combustion reaction demonstrates that methane plus oxygen will burn and produce carbon dioxide, water, and energy. Naphthalene is the simplest polycyclic aromatic hydrocarbon.