The correct answer is: A. Astakali
Bauxite is a type of rock that is the main source of aluminum. It is found in many parts of the world, including Jharkhand, India. The largest bauxite deposit in Jharkhand is located at Astakali, in the district of West Singhbhum. The deposit is estimated to contain over 1 billion tonnes of bauxite.
Bauxite is mined by open-pit mining. The ore is then crushed and ground into a fine powder. The powder is then mixed with water and sodium hydroxide to form a solution. The solution is then filtered to remove the impurities. The remaining solution is then heated to precipitate the aluminum oxide. The aluminum oxide is then calcined to produce alumina. Alumina is the main raw material used to produce aluminum metal.
The mining of bauxite has a number of environmental impacts. The mining process can cause deforestation, soil erosion, and water pollution. The mining of bauxite also releases greenhouse gases into the atmosphere.
Despite the environmental impacts, the mining of bauxite is an important economic activity in Jharkhand. The bauxite industry employs thousands of people and generates billions of rupees in revenue each year.
The other options are incorrect because:
- Gua is a town in the district of East Singhbhum, Jharkhand. It is not a major bauxite-producing area.
- Karaikela is a town in the district of Seraikela Kharsawan, Jharkhand. It is not a major bauxite-producing area.
- Ranchi is the capital of Jharkhand. It is not a major bauxite-producing area.