Question

Magnetite, haematite, limonite and siderite are the ores of which mineral?
a. Aluminium
b. Copper
c. Manganese
d. Iron

Answer 1

Hint: The ores of this mineral are typically rich in iron oxides and range from dark grey, bright yellow, or deep purple to rusty red in colour. Minerals from the ore can be extracted economically. It is the most widely used metal in the world. It is used in buildings, cars, vehicles, and machinery in particular.

Complete answer:
Different forms of iron ore contain a varying percentage of pure iron. Magnetite, hematite, limonite and siderite are some of the ores of Iron. Magnetite has the highest iron ore consistency and contains 72% pure iron. Haematite contains iron ore 60-70% pure iron. There is 40-60% pure iron in limonite. Siderite contains many impurities and has pure iron of just 40-50%.

Ores containing very high haematite or magnetite amounts (greater than about 60 per cent iron) are referred to as "normal ore" or "direct shipping ore," which means that they can be fed directly into blast furnaces that produce iron.

Iron ore is the raw material used for the production of pig iron, which is one of the main raw materials for the production of steel. 98% of mined iron ore is used for the production of steel. The Financial Times speculated in 2011 that iron ore is more integral to the world economy than any other commodity, except maybe oil.

In the U.S., Eastern Canada, and Northern Sweden, magnetite iron ore is currently mined in Minnesota and Michigan. Currently, magnetite-bearing banded iron formation is extensively mined in Brazil, which exports substantial amounts to Asia, and Australia is experiencing a nascent and large magnetite iron ore industry.

Hence, the correct answer is option D.

Note:
 India's gross recoverable iron ore reserves are around 9.602 million tonnes of hematite and 3.408 million tonnes of magnetite. The major Indian states producing iron ore are Chhattisgarh, Madhya Pradesh, Karnataka, Jharkhand, Odisha, Goa, Maharashtra, Andhra Pradesh, Kerala, Rajasthan and Tamil Nadu. On average world consumption of iron ore rises by 10% per year, with China, Japan, Korea, the United States, and the European Union being the main consumers.