___________ is a red coloured ore.

_____________ mainly contains heavier hydrocarbons with asphaltic base.

What provides fuel for heat and lighting lubricants for machinery and raw materials for a number of manufacturing industries ? 

Which of the following types of coal contains above 90% carbon?

____________ is one of the most indispensable mineral used in electric and electronic industries.

___________ is mainly used in the manufacturing of steel and ferro-manganese alloy.

_____________ is found in association with rocks composed of calcium carbonates or calcium and magnesium carbonates.

________________ is generated by using coal, petroleum and natural gas.

Sulphur is a by - product of

_____________ may occur in association with petroleum.