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Which metal contains 'limonite' mineral?
1. Cr
2. Fe
3. Co
4. W

1 Answer

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Correct Answer - Option 2 : Fe

The correct answer is Fe.

Mineral:

  •  A mineral is an element or chemical compound that is normally crystalline and that has been formed as a result of geological processes.
  • For obtaining a particular metal, first, we look for minerals which are naturally occurring chemical substances in the earth’s crust and are obtained through mining.
  • Out of many minerals in which a metal may be found, only a few are viable to be used as a source of that metal.
  • Such minerals are known as ores.

Explanation:

  • Limonite
    • The composition of limonite is 2FeO3.3H2O.
    • It is an inferior ore, yellowish in color, and contains 40 to 60 percent iron metal.
    • Duda series in Raniganj coalfield, Garhwal in Uttarakhand, Mirzapur in Uttar Pradesh, and Kangra valley of Himachal Pradesh.
    • Iron Ore is classified into Haematite, MagnetiteLimonite & Siderite.
  • Ores of cobalt are Smelite,Cobaltite,Erythrite.
  • The ore of chromium is chromite.
  • Ores of tungsten are wolframite, cheelite and ferberite.

​Hence, Fe metal contains 'limonite' mineral.

The other ores of Fe are:

Haematite

  • It has 60-70 percent metallic content.
  • It is Reddish and of the best quality.
  • It is found in Dharwad and Cuddapah rock systems of peninsular India.
  • 80 percent of haematite reserves are in Odisha, Jharkhand, Chhattisgarh, and Andhra Pradesh.
  • In the western section, Karnataka, Maharashtra, and Goa have this kind of ore.
  • Hematite ore is the most important industrial iron ore in terms of the quantity used.

Magnetite

  • Magnetite is the finest iron ore with a very high content of iron up to 70 percent.
  • It has excellent magnetic qualities, especially valuable in the electrical industry.
  • It is found in Dharwad and Cuddapah systems.
  • Karnataka, Andhra Pradesh, Rajasthan, Tamil Nadu, and Kerala.

Siderite

  • It is inferior in quality.
  • Contains less than 40 percent iron.
  • It contains many impurities.
  • mining is not economically variable.
  • However, it is self-fluxing due to the presence of lime.

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