Question

The chemical name of marble is:
a.) Calcium carbonate
b.) Magnesium carbonate
c.) Calcium chloride
d.) Calcium sulphate

Answer 1

Hint : Marble is a metamorphic rock which is composed of carbonate minerals, most commonly calamite and dolomite. It is composed of many chemicals.

Complete step by step solution :
Marble is composed mainly of calcite, dolomite, or perhaps serpentine. The chemical composition of marble is: 38–42% Lime $(CaO)$, 20–25% Silica $(Si{O}_{2})$, 2–4% Alumina $({Al}_{2}{O}_{3})$, 1.5–2.5% oxides $(NaO \quad and \quad MgO)$, and 30–32% ($MgC{O}_{3}$ and others).

The chemical name of marble is calcium carbonate. Its chemical formula is $CaC{O}_{3}$.
Hence, the correct option is option (a).

The properties of marble or calcium carbonate are:
The color of the marble is white or pink.
It is derived from limestone and dolomite.
It has a medium-sized grain and we can see interlocking with the naked eye.
It is hard although it is made from a soft mineral.
It has a granoblastic or a granular structure.
As it is composed of calcium carbonate, it can react with many acids.
Marble is utilized in monuments, buildings, sculptures, paving, and other projects. It has also been used in flooring since ancient times.

Note : Although it is white in color, it can be of different colors as well. It is typically found among the other metamorphic rocks such as gneiss and mica schists.