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Write the chemical equations involved in the extraction of lead from galena by self-reduction process.

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Lead is mainly extracted from its sulphide ore called galena . Roastion is done followed by reduciton with carbon . Self - reduction finally takes place .
`2 PbS + 3O_3 rarr 2PbO + SO_2`
`PbS +2O_2 rarr PbSO_4`
`PbSO_4 rarr 2Pb + 2 SO_2`
` PbSO-4 +PbO rarr 2Pb+SO_2`.
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Knowledge Check

  • Why lime stone is added in the extraction of lead from galena?

    A
    It prevents the formation of `PbSO_(4)`
    B
    It removes the impurity of silica as fusible slag.
    C
    It converts lead silicate to lead oxide
    D
    It moves the impurity of iron oxide as fusible slag.

  • Why lime stone is added in the extraction of lead from galena ?

    A
    It prevents the formation of `PbSO_4`
    B
    It remove the impurity of silica as fusible slag
    C
    It converts lead silicate to lead oxide
    D
    It remove the impurity of iron oxide as fusible slag

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