Question:

Blister copper obtained during extraction from cuprous oxide is called so because

Updated On: Jul 6, 2022
  • it has blister like eruptions due to evolution of gas
  • it has a shining surface like blister
  • it is the most impure form of copper
  • its surface is uneven due to different thickness at different places
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The Correct Option is A

Solution and Explanation

Solidified copper obtained is called blister copper since it has blistered appearance due to the evolution of sulphur dioxide gas. $2Cu_2O + Cu_2S \to 6Cu + SO_2$
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Top Questions on General Principles and Processes of Isolation of Elements

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Concepts Used:

General Principles and Processes of Isolation of Elements

What are Ores and Minerals? 

Minerals are the naturally occurring, homogeneous inorganic solid substances. They are having a definite chemical composition and crystalline structure, hardness and color. For example, copper pyrite, calamine, etc.

Impurities in an ore are called gauge. The removal of a gauge from the ore is called concentration ore. 

Several steps are involved in the extraction of pure metal from ores. Major steps are as follows –

  • Concentration of the ore
  • Isolation of the metal from its concentrated ore
  • Purification of the metal