Question

Write the name and chemical formula of any one ore of iron and zinc each.

Answer 1

An ore is basically a natural rock or sediment that contains one or more valuable minerals that can be further mined, treated and sold at a profit. The ores of iron and zinc are magnetite and Zinc blended respectively.

Complete step by step answer:
Ores are the minerals from which metal is conveniently and profitably extracted. Amon all the ores of iron, magnetite is one of its finest ore.
Some of the properties of magnetite are listed below:
-It is the finest ore among all the ores of Iron.
-It comprises $70\%$ if iron.
-Its chemical formula is $Fe{}_3{O_4}$
-It is reduced to ferrous oxide and later, iron is extracted from its oxide.
Now, moving further to zinc. The most commonly available ore used in the extraction of Zinc is known as Zinc Blende or Zinc Sulphide. It is an inorganic compound with the chemical formula ZnS. It mainly occurs as the mineral known as Sphalerite. This mineral is generally black in colour because of the presence of various impurities. It is also a by-product in the synthesis of ammonia. The reaction is a s shown:
$ZnO + {H_2}S \to ZnS + {H_2}0$
Moreover, it is easily produced by igniting a mixture of zinc and Sulphur. The solutions containing $Z{n^{2 + }}$ salts readily form a precipitate of ZnS in the presence of sulfide ions. The reaction is as shown:
$Z{n^{2 + }} + {S^{2 - }} \to ZnS$

Note:
There is a difference between an ores and minerals. Ore is basically the rock from which the metal is extracted in a convenient and economical way. It has a composition that is definite whereas metals that occur naturally in the Earth’s crust are known as minerals. Further, the minerals that can profitably be used to get the metal are called ores.