In metallurgy the term “gangue” is used for :
- Contamination of undesired earthy materials.
- Contamination of metals, other than desired metal.
- Minerals which are naturally occurring in pure form
- Magnetic impurities in an ore.
The Correct Option is A
Solution and Explanation
In metallurgy, the term "gangue" refers to the impurities or undesired earthy materials that are found mixed with the ore. These materials are not valuable and need to be separated from the ore to extract the desired metal efficiently.
Let's explore the options given:
- Contamination of undesired earthy materials. - This is the correct answer. In the context of metallurgy, "gangue" specifically refers to these materials that are naturally present in any mineral deposit.
- Contamination of metals, other than the desired metal. - This describes different types of impurities present in an ore but does not specifically define "gangue." These impurities could be other metals not classified under gangue.
- Minerals which are naturally occurring in pure form. - This option does not apply, as gangue is neither pure nor valuable. Pure minerals refer to those without impurities and gangue material needs to be removed to isolate these pure minerals.
- Magnetic impurities in an ore. - While some impurities might be magnetic, "gangue" is a broader term covering all non-metallic, non-valuable materials, not just magnetic impurities.
In conclusion, "gangue" represents the unwanted materials in an ore that need to be separated during the metallurgical process to yield the desired metal.
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