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

Which metal is mostly used in the automobiles and air craft? 

Which of the following is a major metallic mineral obtained from veins and lodes? 

Heat energy obtained from the Earth is called 

Which is the major source of power in India? 

The highest quality of hard coal is 

Which one of the following is referred to as black gold? 

Which one of the following is a soft and brownish variety of coal? 

Which mineral belongs to the category of non ferrous minerals? 

Name the iron ore which is most abundant in India.