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Question: Answered & Verified by Expert
Lime stone is added in the extraction of lead from galena why?
ChemistryGeneral Principles and Processes of Isolation of MetalsNEET
Options:
  • A It prevents the formation of PbSO4
  • B It remove the impurity of silica as fusible slag
  • C It converts lead silicate to lead oxide
  • D All of the above
Solution:
1902 Upvotes Verified Answer
The correct answer is: All of the above
CaO+SiO2→CaSiO3 Slag

PbO+SiO2→PbSiO3

CaO converts PbSiO3 to PbO,

PbSiO3+CaO→PbO+CaSiO3

and also prevents the formation of PbSO4.

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