Petroleum is mainly composed of which elements?

What is the common name of petroleum?

Which country is the largest producer of petroleum?

The process of separating crude oil into useful products is called:

Which of these is a product of petroleum?

What is LPG mainly composed of?

What is the main use of petrol?

Which gas is released when petroleum is burned?

Petroleum is found deep inside the:

Petroleum is a type of: