CBSE Questions for Class 10 Geography Minerals And Energy Resources Quiz 4 - MCQExams.com

• India is rich in good quality iron ores. Magnetite is the finest iron ore with a very high content of iron up to 70 per cent. It has excellent magnetic qualities, especially valuable in the electrical industry. Hematite ore is the most important industrial iron ore in terms of the quantity used, but has a slightly lower iron content than magnetite. (50-60 per cent).
• Galena, also called lead glance, is the natural mineral form of lead sulfide .
  

• Bauxite is actually not a mineral. It is a rock formed from a laterite soil that has been severely leached of silica and other soluble materials in a wet tropical or subtropical climate. Aluminum is extracted from this ore.
  
• Largest producer of bauxite is Australia.
  

Bauxite is the most important ore of aluminum which contains only 30–54% alumina, Al2O3; the rest is a mixture of silica, various iron oxides, and titanium dioxide along with trace amounts of zinc, phosphorous, nickel, vanadium etc

Hematite, also spelled as haematite, is a common iron oxide with a formula called Fe2O3 and has been widespread in rocks and soils

Galena, also called lead glance, is the natural mineral form of lead(II) sulfide (PbS)

The mineral monazite is a reddish-brown phosphate containing rare earth metals and an important source of thorium, lanthanum, and cerium

• An alloy can be defined as a mixture of metal with other element. Ferro alloy is iron mixed with other element.
  
• Manganese is a chemical compound which is not found as a free element. It is often found as an alloy mixed with iron. It is mainly used in production of stainless steel.