Mineral and Ores
Mineral and Ores
Minerals & Ores:
A mineral is a naturally occurring inorganic substance found under the surface of the Earth. An ore is the mineral from which one or more metals can be extracted profitably. The process use to extract a metal in its pure form from its ore is called metallurgy. For example aluminum is extracted from bauxite ore. The extraction of metals involves the following process
1 Concentration of Ore: The impurities from the ore are removed. This process is known as concentration of ore.
2. Reduction: The process of reduction of metal ore to get the metal in its free state.
Which of the following are correct : (a) Metal – bearing substances, found in the earth crust, are called minerals. (b) The minerals from which metals can be extracted profitably are called ores. (c) Refining is the process of purification of metal. | |||
| Right Option : D | |||
| View Explanation | |||
Which of the following substances can be profitably extracted from ores ? | |||
| Right Option : D | |||
| View Explanation | |||
Which of the following are correct : (a) Metals occur in nature in free state or in combined state. (b) A metal is said to occur in native or free when it is found in nature in the metallic state. (c) All ores are minerals, but all minerals are not ores. | |||
| Right Option : D | |||
| View Explanation | |||
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