1. Tardigrade
  2. Question
  3. Chemistry
  4. Statement 1: In extraction of copper from chalcopyrite after roasting in supply of air at moderate temperature, the temperature of the roasting ore is increased above the fusion temperature and then silica is added in reverberatory furnace. Statement 2: In the extraction of copper from chalcopyrites during smelting, the impurity of iron oxide is removed as fusible slag (FeSiO3) in blast furnace or reverberatory furnace.

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Q. Statement 1: In extraction of copper from chalcopyrite after roasting in supply of air at moderate temperature, the temperature of the roasting ore is increased above the fusion temperature and then silica is added in reverberatory furnace.
Statement 2: In the extraction of copper from chalcopyrites during smelting, the impurity of iron oxide is removed as fusible slag $(FeSiO_3)$ in blast furnace or reverberatory furnace.

General Principles and Processes of Isolation of Elements

Solution:

Correct answer is (d) If Statement 1 is false but Statement 2 is true.