Question

The metal that is most abundant in the earth is ______________.
A)Silicon
B)Iron
C)Aluminium
D)Nikel

Answer 1

Hint :The crust of the Earth is divided up into an older, thicker continental crust and a younger, denser oceanic crust. The Earth's crust's dynamic geology is informed by plate tectonics.
The metal that is most abundant in the earth originated from bauxite, and ore that is found in the topsoil of various tropical and subtropical regions.

Complete answer :
The most abundant metal in the earth’s crust is aluminium but it is never found in a pure state as it is combined with other various elements, the most encountered elements are aluminum oxide and alum. Aluminium is a lightweight, soft and durable metal that can be shaped very easily.

Aluminium is used in various industries such as in the manufacturing of foils, cans, rocket and kitchen utensils. It is an important ingredient in many synthetic materials. Once, Aluminium was considered as a more precious metal than gold.
Most of the aluminium comes from the rock processing called bauxite, this rock combined with oxygen contains aluminium in its form present in nature.
The water is removed, leaving aluminium oxide from the bauxite, from which the aluminium is refined.

Option C , is the correct answer.

Note :
The earth has an abundance of metals and non-metals.
Oxygen - 46.6%
Aluminium - 8.9%
Calcium - 3.63%
Gold - 0.0011%
Silicon - 27.7%
Iron – 5%