Copper is the most moble of first row transition meals and occurs in small deposits in several countries ares of copper include chalcanthite `(CuSO_(4)5H_(2)O)`, afecamie `(CuCHOH)_(3))`, cuprite`(Cu_(2)O)` Copper glance `(Cu_(2)S)` and rolachite `(Cu_(2)(OH)_(2)CO_(3))`. However, 80% of the world copper production comes from the ore chalcopyrite `(CuFeS_(2))`. The extraction of copper from chalopyrite in polves partial roasting, removal of Iron self-reduction.
Iron is removed from chalcopyrite as
Copper is the most moble of first row transition meals and occurs in small deposits in several countries ares of copper include chalcanthite `(CuSO_(4)5H_(2)O)`, afecamie `(CuCHOH)_(3))`, cuprite`(Cu_(2)O)` Copper glance `(Cu_(2)S)` and rolachite `(Cu_(2)(OH)_(2)CO_(3))`. However, 80% of the world copper production comes from the ore chalcopyrite `(CuFeS_(2))`. The extraction of copper from chalopyrite in polves partial roasting, removal of Iron self-reduction.
Iron is removed from chalcopyrite as
Iron is removed from chalcopyrite as
A
FeO
B
`FeS`
C
`Fe_(2)O_(3)`
D
`FeSiO_(3)`
Text Solution
Verified by Experts
The correct Answer is:
D
Iron is removed from chalcopyrites `(CuFeS_(2))` as slag `FeSiO_(3), FeO+SiO_(2) to FeSiO_(3)`
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i) Bauxite ( Al_2O_3 * 2H_2O ) ii) Copper iron pyrites ( CuFeS_2 ) iii) Gypsum ( CaSO_4 * 2H_2O ) Which of the given ores contains two metals ?
A 1.10 g sample of copper ore is dissolved and the Cu^(2+) is treated with excess KI. The liberated I_2 requires 12.12 mL of 0.10M Na_(2) S_(2)O_3 solution for titration. Find the % of copper by mass in ore.
Knowledge Check
Copper is the most moble of first row transition meals and occurs in small deposits in several countries ares of copper include chalcanthite (CuSO_(4)5H_(2)O) , afecamie (CuCHOH)_(3)) , cuprite (Cu_(2)O) Copper glance (Cu_(2)S) and rolachite (Cu_(2)(OH)_(2)CO_(3)) . However, 80% of the world copper production comes from the ore chalcopyrite (CuFeS_(2)) . The extraction of copper from chalopyrite in polves partial roasting, removal of Iron self-reduction. Partial Roasting of chalcopyrite produces
Copper is the most moble of first row transition meals and occurs in small deposits in several countries ares of copper include chalcanthite (CuSO_(4)5H_(2)O) , afecamie (CuCHOH)_(3)) , cuprite (Cu_(2)O) Copper glance (Cu_(2)S) and rolachite (Cu_(2)(OH)_(2)CO_(3)) . However, 80% of the world copper production comes from the ore chalcopyrite (CuFeS_(2)) . The extraction of copper from chalopyrite in polves partial roasting, removal of Iron self-reduction. Partial Roasting of chalcopyrite produces
A
`Cu_(2)S and FeO`
B
`Cu_(2)O and FeO`
C
`CuS and Fe_(2) O_(3)`
D
`Cu_(2) to and Fe_(2)O_(3)`
Copper is the most moble of first row transition meals and occurs in small deposits in several countries ares of copper include chalcanthite (CuSO_(4)5H_(2)O) , afecamie (CuCHOH)_(3)) , cuprite (Cu_(2)O) Copper glance (Cu_(2)S) and rolachite (Cu_(2)(OH)_(2)CO_(3)) . However, 80% of the world copper production comes from the ore chalcopyrite (CuFeS_(2)) . The extraction of copper from chalopyrite in polves partial roasting, removal of Iron self-reduction. In sell reduction the reducing species is
Copper is the most moble of first row transition meals and occurs in small deposits in several countries ares of copper include chalcanthite (CuSO_(4)5H_(2)O) , afecamie (CuCHOH)_(3)) , cuprite (Cu_(2)O) Copper glance (Cu_(2)S) and rolachite (Cu_(2)(OH)_(2)CO_(3)) . However, 80% of the world copper production comes from the ore chalcopyrite (CuFeS_(2)) . The extraction of copper from chalopyrite in polves partial roasting, removal of Iron self-reduction. In sell reduction the reducing species is
A
S
B
`O^(-2)`
C
`S^(-2)`
D
`SO_(2)`
A composite bar of uniform cross-section is made of 25 cm of copper, 10 cm of nickel and 15 cm of aluminium with perfect thermal contacts. The free copper end of the rod is at 100^(@)C and the free aluminium ends is at 0^(@)C . If K_(Cu)=2K_(Al)" and "K_(Al)=3K_(Ni) , then the temperatures of Cu-Ni and Ni-Al junctions are respectively. (Assume no loss of heat occurs from the sides of the rod, K-thermal conductivity).
A composite bar of uniform cross-section is made of 25 cm of copper, 10 cm of nickel and 15 cm of aluminium with perfect thermal contacts. The free copper end of the rod is at 100^(@)C and the free aluminium ends is at 0^(@)C . If K_(Cu)=2K_(Al)" and "K_(Al)=3K_(Ni) , then the temperatures of Cu-Ni and Ni-Al junctions are respectively. (Assume no loss of heat occurs from the sides of the rod, K-thermal conductivity).
A
`82.3" "^(@)C, 31.3" "^(@)C`
B
`78.3" "^(@)C, 26.1" "^(@)C`
C
`70" "^(@)C, 23.3" "^(@)C`
D
`90.3" "^(@)C, 30.1" "^(@)C`
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