Extraction of Metals - Result Question 93

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

$(1979,2 M)$

Show Answer

Solution:

  1. In the first step, galena is heated in presence of $O _2$ (limited quantity) in a reverberatory furnace, where $PbS$ is partially oxidised to $PbO$ :

$$ PbS+\frac{3}{2} O _2 \longrightarrow PbO+SO _2 $$

In the second step, more $PbS$ is added and heated in absence of $O _2$, where the following self reduction takes place

$$ PbS+2 PbO \longrightarrow 3 Pb+SO _2 $$



NCERT Chapter Video Solution

Dual Pane