Question

Which one of the following is the finest quality of iron ore?
a: Haematite
b: Limonite
c: Magnetite
d: Siderite

Answer 1

Hint: Ore is a naturally occurring rock which contains minerals or minerals. Metals are extracted from ores. Iron ores are mainly found in the sedimentary rocks. They are formed by the chemical reactions which joint iron and oxygen in freshwater.

Complete Answer:

Option a: Haematite is one of the common iron oxides. The formula of hematite is Fe2O3. It is found in different colours. In earthy grained form, its colour is metallic grey. In crystal form, its colour is steel grey to black. It is one of the most important iron ores but is not the finest quality of iron ore. This is an incorrect answer to this question.

Option b: Limonite is an iron ore which consists of the mixture of hydrated iron oxide hydroxide. The formula of limonite is FeO(OH).nH2O. It is one of the most important iron ores but is not the finest quality of iron ore. This is an incorrect answer to this question.

Option c: Magnetite is one of the most important iron ores. It is a rock mineral. Its formula is Fe3O4. It has magnetic properties. It can also be converted into a magnet. Magnetite is the finest quality of iron ore. This is the correct answer to this question.

Option d: Siderite is a carbonate mineral. Its formula is FeCO3. It composes iron carbonate. It is sometimes colourless but other times it has many colours like pale yellow, grey, brown, red, green, black. It is not the finest iron ore. This is an incorrect answer to this question.

Option c is the correct answer to this question because Magnetite is the finest quality of iron ore.

Note: All the major part of iron ores is found in the rocks which have been created nearly 1.8 billion year ago. Iron ore is basically used in the production of iron which is an important metal.