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Give the chemical reaction involved for extraction of zinc from zinc oxide. |
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Answer» E HERES UR ANSANSWERDuring extraction of Zn from ZINC BLENDE (ZnS), following reactions OCCUR:(i) ZnS is roasted in excess air at 1200 K to form ZnO.2ZnS+2O 2 Δ 2ZnO+2SO 2 (ii) ZnO is heated with crushed COKE at 1673 K, where it is reduced to Zn.ZnO+C 1676K Zn+CO(iii) Electrorefining is carried out for refining of impure zinc. Anode is impure zinc and cathode is pure zinc. Electrolyte is a mixture of zinc sulphate and dilute sulphuric acid (small amount). When current is passed, zinc is deposited on cathode and is collected.At anode : Zn→Zn 2+ +2e − At cathode: Zn 2+ +2e − →Zn |
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