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NTA Abhyas NEET2020ChemistryGeneral Principles and Processes of Isolation of MetalsPractice

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

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

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