Minerals and Ores

Dolomite (CaMg(CO3)2) is indeed an important source of magnesium, containing both calcium and magnesium carbonates. While magnesite (MgCO3) is the primary magnesium ore, dolomite is commercially significant and widely used for magnesium extraction. Bauxite is aluminum ore, pitchblende is uranium ore, and limestone is primarily calcium carbonate.

Bauxite is the primary ore of aluminum and is used extensively in the aluminum industry. It contains aluminum oxides and hydroxides, which are processed through the Bayer process and Hall-Héroult process to extract pure aluminum metal.

Raniganj in West Bengal's Asansol region is famous for its coal mines. The Raniganj Coalfield is one of India's oldest and most important coal-producing regions, with mining activities dating back to the 18th century.

A ferrous mineral contains iron. Cobalt is a ferrous mineral.

This is the correct answer as bauxite is a non-ferrous mineral. It does not contain iron.

This is the correct answer as bauxite is an example of such a weathered mass and aluminium is extracted from bauxite.

Bauxite is formed when residual mass of weathered material containing ores remains after the decomposition of surface rocks, and the removal of soluble constituents from the surface.

This is the correct answer. Potash is found in many places in the world but is not found in ocean waters and ocean beds.

This statement is the correct answer. The ore from Kudremukh mines in Karnataka is transported as slurry through a pipeline to a port near Mangalore.

This is the correct answer as this statement is correct. Extraction of minerals in India is possible only after obtaining due permission from the government.

This is the correct answer. Orissa is the largest producer of manganese ores in India.

This is the correct answer. Due to its excellent di-electric strength, low power loss factor, insulating properties and resistance to high voltage, mica is one of the most indispensable minerals used in electric and electronic industries.

This is the correct answer. The Balaghat mines in Madhya Pradesh produce 52 per cent of India’s copper. The Singbhum district of Jharkhandand and the Khetri mines in Rajasthan are also famous for their copper deposits.

This is the correct answer as uranium and thorium are available in Jharkhand and the Aravalli ranges of Rajasthan. Thorium is also found in Monazite sands of Kerala.