Where is oil refinery located in Kerala?

Minerals taken out of the earth are called

The minerals such as petrol, coal, mica and limestone are

Rocks are made up of

What is found along with petroleum in some oil wells?

Which one of the following city has petroleum refinery?

Which one of the following state has largest deposit of iron ore?

Rocks that contain enough of a mineral to be mined for profit are called

The quantity of natural resources of the earth are

Which one of the following natural resources are not used completely ?