Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
MHT CET202012 Oct 2020Morning ShiftChemistryGeneral Principles and Processes of Isolation of MetalsActual

What happens during bessemerization process of extraction of copper from copper pyrites?

Options

  1. AAu and Ag metals are deposited as anode mud.
  2. BImpurities as As and Sb are removed as volatile oxides.
  3. CCu is obtained by auto reduction of Cu ₂ O and Cus.
  4. DIron is removed in the form of slag.

Correct answer

C. Cu is obtained by auto reduction of Cu ₂ O and Cus.

Step-by-step solution

Process for extraction of copper from copper pyrite At the starting copper pyrite is roasted in a reverberatory furnace because on roasting we will get copper oxide from the copper pyrite from which the copper can be extracted by doing reduction. 2 CuFeS ₂+ O ₂ Cu ₂ ~S +2 FeS + SO ₂ Now as we know that the iron is more reactive than the copper. So, ferrous sulphide and cuprous sulphide must react with oxygen to form ferrous oxide, copper sulphur dioxide. 2 FeS +3 O ₂ 2 FeO +2 SO ₂ Cu ₂ ~S + O ₂ Cu ₂ O + FeO ₂ Cu ₂

Practice General Principles and Processes of Isolation of Metals on Quantrex Academy →

More from General Principles and Processes of Isolation of Metals

The metal purified by Mond process is X. The number of unpaired electrons in X is 2025Which of the following are carbonate ores ? I. Siderite II. Kaolinite III. Calamine IV. Sphalerite 2025Which of the following methods is useful for producing semiconductor grade metals of high purity ? 2025Match the following List-I (Process) List-II (Metal) A) Hall-Heroult process I) Ti B) Mond process II) In C) van-Arkel process III) Al D) Zone refining process IV) Ni The correct a 2025Consider the following: Statement-I : In the extraction of Al by Hall-Heroult process, pure Al ₂ O ₃ mixed with Na ₃ ~AlF ₆ lowers its melting point and increases conductivity. Sta 2025Which of the following reactions is an example of roasting ? 2025In the extraction of iron from haematite, the impurity (x) of the ore is removed in the form of ' y ', what are x and y respectively? 2025Which of the following is used as froth stabilizer in froth floatation process? 2025 Full General Principles and Processes of Isolation of Metals list All MHT CET PYQs