InterviewSolution
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InterviewSolution
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Match the extraction processes listed in column I with metals listed in column I. `{:(,"Column I",,"Column II"),((A),"Self reduction",(p),"Lead"),((B),"Carbon reduction",(q),"Silver"),((C),"Complex formation and displacement by metal",(r),"Copper"),((D),"Decomposition of iodide",(s),"Bron"):}` |
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Answer» Correct Answer - A::B::C::D "Selt reduction" " " `[{:(p, -"Lead"),(r,-"Copper"):}]` In head metal `{{:(,2PbS+3O_(2) to2PbO+2SO_(2)("Slef reduction")),(,2PO+PbS to 3Pb+SO_(2)):}` In copper metal `2Cu_(2)S+3O_(2) to 2Cu_(2)O+2SO_(2)` `Cu_(2)S+2Cu_(2) to 6Cu_(2)+2SO_(2)` (Slef reduction) (B) Carbon reduction p- Lead In lead metal `PbO+C to Pb+CO` `PbO+CO to Pb+CO_(2)` Carbon reduction process is used for the reduction of oxides of electropositive metals like , Fe, Pb etc. This reduction is carried out with coal or coke on strongly heating. (C) Comlex formation and displacement by meta. In silver metal Average `(Ag_(2)S)` mineral of Ag is treated iwth `0.7% NaCN` solution in presence of air, therefore, firstly soldium argentocyanide compled is formed which on heating with zinc meta, therefore, by displacement silver is isolated `Ag_(2)S+4NaCN to 2Na[Ag(CN)_(2)]+NaS` `2Na[Ag(CN)_(2)]+Zn to underset("soluble")(Na_(2)[Zn(CN)_(4)])+2underset("ppt")(Ag)darr` (D) Decomposition of iodide _______ (S) Boron By decomposition of iodide boron metal is isolated. `2BI_(3)overset("Wm heat")to 2B+3I_(2)` |
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