Which is the main chemical element present in coal and petroleum?
Phosphorus
Fluorine
Carbon
___ is the main chemical element present in coal and petroleum.
What are the main uses of coal and petroleum products?
(a) What happens when carbon burns in air? Write the chemical equation of the reaction which takes place. (b) Why are coal and petroleum called fossil fuels? (c) Explain how coal was formed in the earth. (d) Describe how petroleum was formed in the earth. (e) Name a fossil fuel other than coal and petroleum.
From which of the following are coal and petroleum obtained?