Chemistry part 4

The concentration of salts (measured as salinity per thousand parts) exceeds 100% in hypersaline lagoons. It is less than 5% in fresher and 30-35% salinity on average in seawater.

Malachite [Cu₂CO₃(OH)₂] is an ore of copper. It is one of the first ores to produce copper metal. Today it is of minor importance as an ore of copper, as this ore is usually produced in small quantities.

Chromite is an ore of chromium. It is used in metallurgical and chemical industries. About 99% of its total production in the country is produced in Odisha.

Hematite (Fe₂O₃) is an ore of iron. Some other ores of excess iron are—

• Magnetite - Fe₃O₄
• Goethite - FeO(OH)
• Limonite - FeO(OH).nH₂O
• Siderite - FeCO₃

Hematite (Fe₂O₃) is an ore of iron. Some other ores of excess iron are—

• Magnetite - Fe₃O₄
• Goethite - FeO(OH)
• Limonite - FeO(OH).nH₂O
• Siderite - FeCO₃

Cuprite is not an ore of iron. Its chemical formula is Cu₂O, which is an ore of copper.

Cinnabar (HgS) is the main ore of mercury. It is mainly found in the United States of America, Mexico, and Italy. It is a toxic substance.

Cinnabar (HgS) is the main ore of mercury. It is mainly found in the United States of America, Mexico, and Italy. It is a toxic substance.

Cinnabar (HgS) is the main ore of mercury. It is mainly found in the United States of America, Mexico, and Italy. It is a toxic substance.

Molybdenite is an ore of molybdenum. Molybdenum oxide (MoO₃) is produced by dissolving an ore of molybdenum in air or fusion with sodium carbonate. Powdered metal is prepared by reducing the obtained molybdenum oxide with hydrogen or carbon.