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NTA Abhyas JEE Main2020ChemistryGeneral Principles and Processes of Isolation of MetalsPractice

The extraction principle used in extraction of a metal 'M' can be represented as follows MS + 2 O 2 → MSO 4 MSO 4 + MS → 2 M + 2 SO 2 The metal 'M' is

Options

  1. AMg
  2. BPb
  3. CSn
  4. DFe

Correct answer

B. Pb

Step-by-step solution

It is a case of self reduction. The concentrated galena (PbS) is partially oxidised by adjusting the air supply. PbS + 2 O 2 → PbSO 4 The temperature is raised, air supply reduced and fresh galena (PbS) added. PbS + PbSO 4 → 2 Pb + 2 SO 2 ↑

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