Question

name two fossil fuels. list one product each formed when these in burn in air:

(a)sufficient oxygen

(b)insufficient oxygen

Answer 1

Fossil fuel:

Fossil fuels are fuels formed by natural processes such as anaerobic decomposition of buried dead organisms.

Two fossil fuels are:

1. Coal:

• Burning of coal with sufficient oxygen:

Coal + O₂ -------------------> CO₂ + H₂O

• Burning of coal in insufficient O₂:

Coal + O ----------------------------> Co

2. Petrolium:

• Burning of petrolium in sufficient O₂:

Petrolium + O₂ ----------------------> CO₂ + H₂O

• In insufficient O₂:

Petrolium + O -------------------------> CO