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NTA Abhyas NEET2020ChemistryGeneral Principles and Processes of Isolation of MetalsPractice

which of the following reaction explains a smelting process?

Options

  1. A  ZnCO 3 → ZnO + CO 2
  2. B  Fe 2 O 3 + 3 C → 2 Fe + 3 CO
  3. C  2 PbS + 3 O 2 → 2 PbO + 2 SO 2
  4. D  Al 2 O 3 · 2 H 2 O → Al 2 O 3 + 2 H 2 O

Correct answer

B.   Fe 2 O 3 + 3 C → 2 Fe + 3 CO

Step-by-step solution

  ZnCO 3 → ZnO + CO 2 , It shows the calcination process, Heating of hydrated and carbonated ore in the absence of the air then metal oxide will form. Fe 2 O 3 + 3 C → 2 Fe + 3 CO , This is the smelting process. In this process reduction of metal oxide in the presence of the suitable reducing agent like C and CO to get the metal oxide.   2 PbS + 3 O 2 → 2 PbO + 2 SO 2 , This is the roasting process. In this process, heating of the sulphide ores in the presence of the air to obtain the me

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