Question

Steel is made up of:
A.Copper and tin
B.Iron, carbon and chromium
C.Iron, carbon and tin
D.Iron, carbon and silicon

Answer 1

Hint: Steel is a metal of mixture of different elements. It is an alloy of iron and carbon containing less than \[2\% \] carbon and \[1\% \] of manganese and a small amount of silicon, phosphorus, Sulphur and oxygen. Steel is the world's most popular useful material. It is completely recyclable and requires little energy.

Complete step by step answer:
 Steel is formed by the mixture of iron and carbon. Iron and carbon are the primary materials to form. Steel reacts with oxygen and contains corrosion. So, for the resistance of corrosion, added chromium in the formation of steel.
The highly used component of steel is iron, which is used in pure state but not much harder than copper. In steel, iron is used in solid state and consists of many crystals which join one another to their boundaries.
There are 4 types of steel : carbon steel, alloy steel, stainless steel and tool steel.
Steel is the formation of Iron oxide and stainless steel is the formation of chromium oxide.
As we know the formation of steel by using iron, carbon and chromium.

Thus, option (B) is the correct answer.

Note:
To make steel iron ore is heated and melted in a furnace where impurities are removed and the added carbon in it. For the resistant nature chromium is also used to form steel. Even there are different types of steel which contain different types of elements.