JEE Advanced 2016 Paper 2 Offline

MCQ (More than One Correct Answer)

-2

Extraction of copper from copper pyrite (CuFeS₂) involves

crushing followed by concentration of the ore by froth flotation

removal of iron as slag

self-reduction step to produce ‘blister copper’ following evolution of SO₂

refining of ‘blister copper’ by carbon reduction

JEE Advanced 2015 Paper 1 Offline

MCQ (More than One Correct Answer)

-2

Copper is purified by electrolytic refining of blister copper. The correct statement(s) about this process is(are)

Impure Cu strip is used as cathode

Acidified aqueous CuSO₄ is used as electrolyte

Pure Cu deposits at cathode

Impurities settle as anode – mud

JEE Advanced 2013 Paper 2 Offline

MCQ (More than One Correct Answer)

-0.75

The carbon–based reduction method is NOT used for the extraction of

tin from SnO₂

iron from Fe₂O₃

aluminium from Al₂O₃

magnesium from MgCO₃.CaCO₃

IIT-JEE 2011 Paper 1 Offline

MCQ (More than One Correct Answer)

-0.5

Extraction of metal from the ore cassiterite involves

carbon reduction of an oxide ore

self-reduction of a sulphide ore

removal of copper impurity

removal of iron impurity

JEE Advanced Subjects