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  4. Upon heating with Cu2S. the reagent(s) that give copper metal is/are

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Q. Upon heating with $Cu_2S.$ the reagent(s) that give copper metal is/are

JEE AdvancedJEE Advanced 2014General Principles and Processes of Isolation of Elements

Solution:

(A) $2 CuFeS _{2}+ O _{2} \xrightarrow{\Delta}Cu _{2} S +2 FeS + SO _{2}$
(B) $4 CuO \xrightarrow{1100^{\circ} C } 2 Cu _{2} O + O _{2}$
$2 Cu _{2} O + Cu _{2} S \xrightarrow{\Delta} 6 Cu + SO _{2}$
(C) $Cu _{2} S +2 Cu _{2} O \xrightarrow{\Delta} 6 Cu + SO _{2}$
(D) $CuSO _{4} \xrightarrow{720^{\circ} C } CuO + SO _{2}+\frac{1}{2} O _{2}$
$4 CuO \xrightarrow{1100^{\circ} C } 2 Cu _{2} O + O _{2}$
$2 Cu _{2} O + Cu _{2} S \xrightarrow{\triangle} 6 Cu + SO _{2}$