- Home
- Standard 12
- Chemistry
General Principles and processes of Isolation of Elements
medium
Copper is extracted from sulphide ore using the method
A
carbon reduction
B
carbon monoxide reduction
C
auto reduction
D
none of these
Solution
The copper can be extracted from its sulphide ore by the auto reduction process.
The ore is reduced by heat alone.
$Cu _2 S + O _2 \rightarrow 2 Cu + SO _2$
The copper and the oxygen have been reduced (decrease in oxidation state). The sulphur has been oxidised (increase in oxidation state). The reducing agent is the sulphide ion in the copper($I$) sulphide.
Standard 12
Chemistry
Similar Questions
List $-I$ contains different compound formed during extraction of metal $(M)$ in List $-II$
| List $-I$ | List $-II$ | ||
| $(P)$ | $[M(CN)_2]^-$ | $(1)$ | $Ni$ (during refining of metal) |
| $(Q)$ | $[M(CO)_4]$ | $(2)$ | $Ti$ (during refining of metal) |
| $(R)$ | $MI_4$ | $(3)$ | $Pb$ (during roasting of ore) |
| $(S)$ | $MO$ | $(4)$ | $Ag$ (during leaching of ore) |
medium
