Electrolyte solution in electrolytic refining of lead contains :

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Problem

Electrolyte solution in electrolytic refining of lead contains : (1) H2SiF6\text{H}_2\text{SiF}_6 only (2) PbSiF6\text{PbSiF}_6 only (3) H2SiF6\text{H}_2\text{SiF}_6 in presence of gelatin (4) H2SiF6\text{H}_2\text{SiF}_6 and PbSiF6\text{PbSiF}_6 in presence of gelatin

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