The correct answer is: a) Lignite (brown coal)
Lignite is a type of coal that is less mature than bituminous coal or anthracite. It is soft and has a high moisture content. Lignite is used to generate electricity and to produce coke, which is used in the steel industry.
Tamil Nadu is one of the largest producers of lignite in India. The state’s lignite deposits are located in the Neyveli Lignite Corporation (NLC) area in the Cuddalore district. The NLC is a public sector undertaking that is responsible for the mining and production of lignite in Tamil Nadu.
The lignite deposits in Tamil Nadu are of high quality and are suitable for use in power generation and the steel industry. The state’s lignite reserves are estimated to be around 11 billion tonnes.
The other options are incorrect because:
- Iron ore is a mineral that is used to produce iron and steel. Tamil Nadu does have some iron ore deposits, but they are not as significant as the lignite deposits.
- Bauxite is a mineral that is used to produce aluminum. Tamil Nadu does have some bauxite deposits, but they are not as significant as the lignite deposits.
- Copper is a metal that is used in a variety of products, including electrical wiring, plumbing fixtures, and coins. Tamil Nadu does have some copper deposits, but they are not as significant as the lignite deposits.