Define the following terms.

(i) Mineral 

(ii) Ore 

(iii) Gangue

Answer

(i) Minerals

• Elements or compounds which occur naturally in earth's crust are called Minerals.

• These minerals may or may not contain metals.

Example: Salt,Clay Marble. 

(ii) Ore 

• Those minerals which contain a very high percentage of a particular metal from which metal can be profitably extracted is called ores. 

Example

• Aluminium Metal is extracted from Bauxite Ore
• Iron Metal is extracted from Hematite Ore
• Sodium Metal is extracted from Rock Salt

(iii) Gangue

Unwanted impurities present in the ore is called Gangue.

Example -  Soil, Sand, Rocky materials.