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Electrolyte solution in electrolytic ref...

Electrolyte solution in electrolytic refining of lead contains :

A

`H_(2)SiF_(6)` only

B

`PbSiF_(6)` only

C

`H_(2)SiF_(6)` in presence of gelatin

D

`H_(2)SiF_(6) and PbSiF_(6)` in presence of geltatin

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The correct Answer is:
D
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