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General Principles and processes of Isolation of Elements
hard
The addition of silica during the extraction of copper from its sulphide ore:
A
converts iron oxide into iron silicate
B
converts copper sulphide into copper silicate
C
reduces copper sulphide into metallic copper
D
reduces the melting point of the reaction mixture
(JEE MAIN-2021)
Solution
Silica is used to remove $FeO$ impurity from the ore of copper
$\mathrm{FeO}+\mathrm{SiO}_{2} \rightarrow \mathrm{FeSiO}_{3}$
$\quad\quad\quad\quad\quad\quad$iron silicate (Slag)
Standard 12
Chemistry
