Question

Which of the following is an example of halide ore.
A. Galena
B. Bauxite
C. Cinnabar
D. Cryolite

Answer 1

Most of the element are found in the crust of the earth, in which form elements are found in the earth is called ore. Ores are of many types like oxide ore, halide ore, sulphide ore and carbonate ore.

Complete step-by-step answer: Ore is a natural rock that contains one or more minerals typically containing metal that can be extracted from earth treated and sold at a profit. Most of the ores are extracted from earth through mining refined by smelting and many processes to extract the valuable minerals and metals.Ores are those minerals from which metal are extracted conveniently and profitably.
These are four types of ores :
1.Oxide ores : the ores that contain metals in oxidised state. In these ores oxygen is a major component along with metal oxide ores need much more energy to melt.Example : haematite, magnetite, chromite and cassiterite.
2. Sulphide ores : the ore that contains metal along with sulphur. In sulphide ore sulphur is a major component along with metal, many metals are found in the form of sulphide ore, extracting the metal from sulphide ore is easier than any other form of ore.Example : Argentite, Cinnabar, Galena
3. Halide ores : the Ore that contains metal and any halogen. Halide ore are very few in nature, chloride ores are the most common halide Ore found in nature.Example : carnallite, cryolite, fluorite, halite
4. Carbonate ores : the ores that are found in carbonated form in nature. In these ores main components are metal, carbon and oxygen.Example calcite, siderite, magnesite, cerussite
Let's take a look at the options given in the question
Galena : molecular formula of Galena is $PbS$, it contains lead and sulphur. So, it is a sulphide ore of lead. So, it is not a halide ore.
Bauxite : molecular formula of Bauxite is $A{l_2}{O_3}$ . It contains aluminium and oxygen it is a oxide ore of aluminium. So, it is not a halide ore
Cinnabar : molecular formula of cinnabar is $HgS$. It contains mercury and sulphur. It is toxic in nature and It is a sulphide ore not a halide ore.
Cryolite : molecular formula of cryolite is $N{a_3}Al{F_6}$ . It contains sodium, aluminium and fluorine. So, it is a halide ore.

Hence, option D is correct.

Note: There are many steps to extract the metal from ore like mining, refining, and purification. Also there are various processes of extraction metals such as magnetic separation, hydraulic washing, froth floatation method etc.