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NEET2016ChemistryGeneral Principles and Processes of Isolation of MetalsActual

Lime stone is added in the extraction of lead from galena why?

Options

  1. AIt prevents the formation of PbSO ₄
  2. BIt remove the impurity of silica as fusible slag
  3. CIt converts lead silicate to lead oxide
  4. DAll of the above

Correct answer

D. All of the above

Step-by-step solution

aligned & CaO + SiO ₂ CaSiO ₃ (Slag) & PbO + SiO ₂ PbSiO ₃ & CaO converts PbSiO ₃ to PbO , & PbSiO ₃+ CaO PbO + CaSiO ₃ aligned and also prevents the formation of PbSO ₄ .

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