1.

Copperisextractedfromcopperpyritesby heatingin a bessemerconverter.The methodisbasedonthe principlethat

Answer»

IRON has less affinityfor oxygenthen sulphurathigh TEMPERATURE
sulphurhas less affinityforoxygenat high temperature
copperhas moreaffinityfor oxygenthansulphurat high temperature
copperhasless affinityforoxygenthansulphurathightemperature

Solution :Whencopperpyritesisheatedin abessemer converterin presenceofablastofoxygen.
It isinitiallyconvertedintoamixtureof` Cu_ 2 S, FeSand SO_2 `.
`2 Cu FeS_ 2+O_2toCu_2S+2FeS+SO_2`
Since ` Cu _2O `is notformedinitiallyeveninpresenceof` O_ 2 `,therefore,copperhaslessaffinityfor OXYGEN than sulphurat high temperature , i.e.,option(d)is CORRECT.


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