___________ or mineral oil is the next major energy source in India after coal.

___________ is found mainly in the tropical and subtropical areas.

The word petroleum is derived from ____________ word.

____________ makes up world's 80% coal output.

Which of the following mineral is used in fertilizer industry?

_________ splits easily into thin sheets.

_____________ may occur in association with petroleum.

Expand ONGC:

Which is an important clean energy resource found in association with or without petroleum ? 

_____________ mainly contains heavier hydrocarbons with asphaltic base.