15. CH_(4)+2O_(2)arrow CO_(2)+2H_(2)O is an example of which type of reaction? a) Synthesis b) Double Replacement c) Combustion d) Single Replacement

The given chemical equation is $CH_{4}+2O_{2}\rightarrow CO_{2}+2H_{2}O$. This equation represents the reaction of methane (CH4) with oxygen (O2) to produce carbon dioxide (CO2) and water (H2O). This type of reaction, where a hydrocarbon (in this case, methane) reacts with oxygen to produce carbon dioxide and water, is known as a combustion reaction. Therefore, the correct answer is c) Combustion.