Minerals and Energy Resources Test - 26

Jharkhand accounts for 25 per cent of reserves and over 14 per cent of the total iron ore production of the country. Iron ore mining first of all started in the Singhbhum district in 1904 (then a part of Bihar). Iron ore of Singhbhum district is of highest quality and will last for hundreds of years.

Singhbhum is known for its iron ore deposits and it provides for the iron ore requirements of the IISCO steel plants located at Hirapur, Kulti and Burnpur.

Open-pit mine can be used in coal pulling out, and they are used broadly in "hard rock" pulling out for ores such as metal ores, copper, gold, iron, aluminium, and many minerals. 

In a release pit coal mine, the pit base would be the bottom mined coal layer increase, since it is usually possible to take out several seams while surface pulling out petroleum. 

In a hard rock mine, the base of the ditch would be the lowest level (elevation) that mining would be conducted on the ore being mined.

Thus, the correct option is D.

Odisha alone accounts for 51 percent of the country's bauxite wealth, followed by Andhra Pradesh (16 percent), Gujarat (9 percent), Jharkhand (6 percent), Maharashtra (5 percent) and Madhya Pradesh & Chhattisgarh (4 percent each). In Odisha and Andhra Pradesh, large bauxite resources are concentrated in the East Coast bauxite deposits.

The correct answer is D .

• Bauxite is the principal ore of aluminum.

• Sulfur is one of the most important elements. 
  
•  It is used to make sulfuric acid, which is the most abundantly made industrial chemical.
  
•  The element itself is an essential plant nutrient.