Minerals and Ores

Mica is a non-metallic mineral used in electrical insulation and cosmetics. Aluminium, Tin, and Gold are all metallic elements. Mica has distinct physical properties - it can be split into thin transparent sheets and is a poor conductor of electricity.

This is the correct answer. The mineral processing like grinding of limestone for cement industry and calcite and soap-stone for ceramic industry generate huge quantity of dust in the atmosphere. It retards the process of infiltration of water into the soil after it settles down on the land.

This is the correct answer. India has got the right to mine manganese nodules from the bed of Indian Ocean from the area which lies beyond the exclusive economic zone and lies in the international waters.

Bauxite (Al2O3·2H2O) is the principal ore of aluminium. Hematite is an iron ore. Pyrite is iron sulfide (fool's gold). Rutile is a titanium ore. Aluminium is primarily extracted from bauxite ore.

Diamond is the hardest known natural mineral on Earth, scoring 10 on the Mohs hardness scale. Its exceptional hardness comes from the strong covalent bonds between carbon atoms arranged in a tetrahedral lattice structure.

P. Cuprite (Cu₂O) has 88.8% copper while chalcocite (Cu₂S) has 79.8% copper. Q. Chalcopyrite is called blister copper. It has the chemical composition CuFeS₂. Chalcocite (Cu₂S) is an important copper ore. It is also known as redruthite or vitreous copper. R. Goethite is a hydroxide ore of iron with the chemical formula of FeO(OH).

Azurite (2CuCO₃•Cu(OH)₂) is commonly known as mountain blue or American stone.

Zincite (ZnO) is the oxide ore of zinc.

Iron pyrite (FeS₂) has a yellow metallic appearance and so it is called fool’s gold. It was mistaken for gold in the ancient times.

The ores of iron are: Marcasite or iron pyrite (FeS₂): sulphide ore Haematite (Fe₂O₃): oxide ore Magnetite (Fe₃O₄): oxide ore Orpiment (As₂S₃) is the sulphide ore of arsenic.

Magnetite is one of the most common iron minerals and an important ore of iron.

The limestone is added to convert rocky material into slag which melts and runs to the bottom. The heat of the furnace decomposes the limestone to give calcium oxide. Thus, it is used as a flux.

Panna district in Madhya Pradesh is home to India's primary diamond mines, operated by NMDC. The region has been a significant diamond source since historical times, producing the famous Kohinoor among others.

Bauxite is the primary ore of aluminum, containing hydrated aluminum oxides. It is the raw material from which aluminum is extracted through the Bayer process and Hall-Heroult electrolytic reduction. India has significant bauxite deposits in Odisha, Jharkhand, and Gujarat.

Ilmenite (Fe.TiO₃) is the oxide ore of titanium. Hausmannite (Mn₃O₄) is the oxide ore of manganese. Linnaeite (Co₃S₄) is the sulphide ore of cobalt. Hence, only ilmenite (Fe.TiO₃) is the oxide ore of titanium.