1
JEE Advanced 2016 Paper 2 Offline
MCQ (More than One Correct Answer)
+4
-2
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Extraction of copper from copper pyrite (CuFeS2) involves
A
crushing followed by concentration of the ore by froth flotation
B
removal of iron as slag
C
self-reduction step to produce ‘blister copper’ following evolution of SO2
D
refining of ‘blister copper’ by carbon reduction
2
JEE Advanced 2015 Paper 1 Offline
MCQ (More than One Correct Answer)
+4
-2
Copper is purified by electrolytic refining of blister copper. The correct statement(s) about this process is(are)
A
Impure Cu strip is used as cathode
B
Acidified aqueous CuSO4 is used as electrolyte
C
Pure Cu deposits at cathode
D
Impurities settle as anode – mud
3
JEE Advanced 2013 Paper 2 Offline
MCQ (More than One Correct Answer)
+3
-0.75
The carbon–based reduction method is NOT used for the extraction of
A
tin from SnO2
B
iron from Fe2O3
C
aluminium from Al2O3
D
magnesium from MgCO3.CaCO3
4
IIT-JEE 2011 Paper 1 Offline
MCQ (More than One Correct Answer)
+2
-0.5
Extraction of metal from the ore cassiterite involves
A
carbon reduction of an oxide ore
B
self-reduction of a sulphide ore
C
removal of copper impurity
D
removal of iron impurity
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