_____________ is the largest producer of bauxite in the world.

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.

______________ is rich in mineral resources .

___________ play an important role in the development of human life.

How many types of coal are there ?

The _________ minerals contain metal in raw form.

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

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

The  _________ minerals do not contain metals.