_____________ is the largest producer of bauxite in the world.

The mineral deposits in North America are located in ____________ zones. 

________ is required to make petrol .

Which among the following states does not have iron ore mines ?

On the basis of the type of the mineral and its commercial importance,minerals are classified into ______ groups.

In some oil fields, ________ is found along with mineral oil.

How many types of coal are there ?

The __________ minerals are the most valuable minerals.

The _________ minerals contain metal in raw form.

Which among the following is not a main mining center of coal ?