Question

Minerals from which metal can be profitably extracted are called:
(A) Ores
(B) Source
(C) Alloy
(D) None of these

Answer 1

Source is a chemical substance from which metal can be obtained, both minerals and ores are sources of metals.
Alloy is a chemical combination of two or more metal or metal with some other element. Aluminium can be extracted from many minerals but from bauxite it can be extracted profitably so bauxite is ore of aluminium.

Complete solution step by step:
Source of metal:
Source of metal is a chemical compound from which metal originates and can be obtained,
Alloy can be described as follows:
When metal combines with other metal or element, Alloy is formed.
The properties exhibited by Alloys are different than its constituent metals or elements.
Alloy can be described as follows:
Minerals are chemical substances obtained through mining and occur naturally in the earth’s crust.
Ore can be described as follows:
Ores are minerals from which metal can be extracted economically as they have a really high percentage of metal.
All ores are minerals but not all minerals are ores.
Ores are raw materials for making metals.
Ores of iron are Haematite($F{{e}_{2}}{{O}_{3}}$), Magnetite($F{{e}_{3}}{{O}_{4}}$), siderite($FeC{{O}_{3}}$) and Iron pyrites($Fe{{S}_{2}}$).
Aluminium can be extracted from many minerals but from bauxite it can be extracted profitably so bauxite is ore of aluminium.
So, from the above discussion, the Minerals from which metal can be profitably extracted are called ores.

Therefore, the correct option is (A).

Note: Ores of zinc are Zinc blende($F{{e}_{2}}{{O}_{3}}$), calamine($FeC{{O}_{3}}$) and Zincite($Fe{{S}_{2}}$).
Ores of Aluminium are bauxite ($Al{{O}_{x}}{{\left( OH \right)}_{3-2x}}~\left[ where\text{ }0\text{ }<\text{ }x\text{ }<\text{ }1 \right]$) and Kaolinite ($[A{{l}_{2}}{{(OH)}_{4}}S{{i}_{2}}{{O}_{5}}]$).