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General Principles and processes of Isolation of Elements
easy
In the extraction of copper from copper pyrites, iron is removed as
A
$FeSO_4$
B
$FeSiO_3$
C
$Fe_3O_4$
D
$Fe_2O_3$
Solution
The copper (II) ions in the copper pyrite are reduced to copper (I) sulphide (which is reduced further to copper metal in the final stage).
The iron in the copper pyrite ends up converted into an iron (II) silicate slag which is removed.
$\mathrm{CuF} \mathrm{eS}_{2}+\mathrm{SiO}_{2}+4 \mathrm{O}_{2} \rightarrow \mathrm{Cu}_{2} \mathrm{S}+2 \mathrm{FeSiO}_{3}+3 \mathrm{SO}_{2}$
Standard 12
Chemistry
Similar Questions
Match List$-I$ and List$-II :$
| List$-I$ | List$-II $ | ||
| $(a)$ | Haematite |
$(i)$ |
$Al _{2} O _{3} \cdot xH _{2} O$ |
| $(b)$ | Bauxite | $(ii)$ |
$Fe _{2} O _{3}$ |
| $(c)$ | Magnetite | $(iii)$ | $CuCO _{3} \cdot Cu ( OH )_{2}$ |
| $(d)$ | Malachite | $(iv)$ | $Fe _{3} O _{4}$ |
Choose the correct answer from the options given below :
