Question

The ore that contains both iron and copper is:
A. malachite
B. dolomite
C. azurite
D. copper pyrites

Answer 1

Hint: In order to this question, to know the correct ore that contains both iron and copper, we should go through the molecular formula of each and every option separately. That’s how we will come to know the ore that contains both the iron and copper.

Complete step by step solution:
In option A.- The molecular formula of Malachite is $Cu{(OH)_2}.CuC{O_3}$ . So, this ore only contains copper, it doesn’t contain iron in their molecular formula. So, malachite is the incorrect option.
In option B.- The molecular formula of Dolomite is $CaC{O_3}.MgC{O_3}$ . This ore doesn’t contain both the iron and the copper. So, dolomite is also the incorrect option.
In option C.- The molecular formula of azurite is $Cu{(OH)_2}.2CuC{O_3}$ . So, this ore only contains copper, it doesn’t contain iron in their molecular formula. So, azurite is the incorrect option.
In option D.- The molecular formula of copper pyrite is $CuFe{S_2}$ . So, this ore contains both the iron as well as copper in its molecular formula. So, Copper Pyrites is the correct option.
Hence, the correct option is D. copper pyrites.

Note: Copper Pyrite is made up of a yellow copper ore $CuFe{S_2}$ of copper and iron sulphide.
Copper in Chalcopyrite is reduced to copper sulphide. Just like in Blast Furnaces, calcium carbonate is added as a flux to create the slag. Iron in Chalcopyrite is removed as Iron silicate slag. Most of the sulphur in Chalcopyrite turns into Sulphur dioxide.