Question

The total number of carbonate ores among the following is
A. Argentite B. Calamine C. Malachite D. Siderite E. Galena F. Magnetite G. Dolomite H. Cassiterite I. Bauxite

Answer 1

Hint: To identify, we must first be aware of each and every ore. An ore containing a \[C{{O}_{3}}\] component is known as a carbonate ore, and they can typically be either aqueous or non-aqueous in nature. Since there is only one mineral, carbonate, in this group of possibilities, we can quickly identify it by comparing after recording the chemical formulas.

Complete Step by Step Solution:
Argentite: Argentite's chemical formula is\[A{{g}_{2}}S\]. This mineral is made up of silver sulphide and often has cubic crystalline formations with a dark grey colour. Silver is frequently extracted using it.

Calamine: An old name for a zinc ore was calamine. The Belgian town of Kelmis, whose French name is "La Calamine," where a zinc mine is located, is where the name "calamine" originated. Large ore mines were present close to the German village of Breinigerberg in the 18^th and 19^th centuries. The name for$ZnC{{O}_{3}}$.

Malachite: Malachite's chemical composition is\[C{{u}_{2}}C{{O}_{3}}{{\left( OH \right)}_{2}}\]. We can infer that malachite is a copper resource from its chemical composition. The most prominent physical characteristic of malachite is its green hue. All specimens of the material are green, varying in hue from pastel too bright to very dark and nearly black.

Siderite: Iron carbonate (\[FeC{{O}_{3}}\]), also known as siderite or chalybite, is a common mineral and an iron ore. The mineral is typically found in hydrothermal metallic veins and thin layers with coal, clay, or shales (as sedimentary deposits) (as gangue, or waste rock).

Magnetite: One of the primary iron ores is magnetite, a mineral having the chemical formula $F{{e}^{2+}}Fe_{2}^{3+}{{O}_{4}}$. It is one of the iron oxides and is ferrimagnetic, meaning that it is attracted to magnets and can be transformed into permanent magnets.

Galena: Lead ore is found in galena. It's sometimes referred to as a lead gaze. It is lead sulphide in its native mineral form (PbS).

Dolomite: Calcium magnesium carbonate, preferably\[CaMg{{\left( C{{O}_{3}} \right)}_{2}}\], makes up the anhydrous carbonate mineral known as dolomite. Additionally, a sedimentary carbonate rock primarily made of the mineral dolomite is referred to by this name. Dolostone is an alternate term occasionally used to refer to the dolomitic rock type.

Cassiterite: A source of silver is cassiterite. It also goes by the name "tinstone," and its chemical make-up is\[Sn{{O}_{2}}\]. The main source of tin is a hefty, metallic, hard substance called tin dioxide. When pure, it is colourless, but when iron impurities are present, it turns brown or black.

Bauxite: A sedimentary rock is bauxite. Only 30% to 45% of bauxite's composition is alumina$A{{l}_{2}}{{O}_{3}}$, with the remainder being a mixture of silica, iron oxides, and titanium dioxide, as well as traces of other elements including zinc, phosphorus, nickel, and vanadium. To determine the solution using chemical formulas, discuss each possibility individually.

Therefore, the ores that have carbonate are Calamine, Malachite, Siderite, Dolomite.
Hence, the correct answer is 4. That is, there are four ores among the given which has carbonate in it.

Note: In order to solve these types of questions, you need to remember the metallurgical processes of different metals. You need to remember the different ores from which they are concentrated and extracted and their different methods.