Question

The best quality iron ore is ___

a) Hematite

b) Magnetite

c) Siderite

d) Limonite

Answer 1

Hint: In an immense container called a blast furnace, iron is extracted from iron ore. The finest quality of the iron ore is not found everywhere & contains more than 70% of iron content and the chemical formula of it is $Fe_3O_4$.

Complete answer:

Hematite and magnetite are the best quality and most significant iron ores for steelmaking. Hematite is the most sought-after ore and the preferred raw material in productive steel mills.

Four main forms of iron ore exist which are mentioned in the options. Let's have a look to find out the best quality iron ore:

A- Hematite, which contains almost 70% iron. It's mostly reddish. A certain amount of hematite is almost black, or even blue.

B- Out Of the common iron minerals, magnetite is the richest. It contains iron at 72.4 percent. It is darker than hematite, ranging from deep dark to blackish brown.

C-Siderite contains approximately 48% iron content.

D-Either limonite or brown ore. It has an iron content of 60 percent. Its color varies from dark to yellow.

Therefore, the correct answer is "option B".

Note:

A mixture of metals or metals in combination with one or more other elements is an alloy. Steel is an alloy of iron and carbon containing less than 2 percent carbon and 1 percent manganese and small quantities of silicon, phosphorus, sulfur and oxygen. For example, combining the metallic elements gold and copper creates red gold, gold and silver becomes white gold, and silver mixed with copper produces sterling silver. Steel is the most significant material for engineering and construction in the world.