WAEC - Chemistry (2001 - No. 28)
One of the products of combustion of pentane in excess air is
pentanol
pentene
nitrogen (ll) oxide
carbon (IV) oxide
Paliwanag
Combustion of Hydrocarbons will usually yield two products: CO2 and H2O. Pentane is an Hydrocarbon, hence one of it's product on combustion will be Carbon(iv)oxide