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(a) Write the chemical reactions involve...

(a) Write the chemical reactions involved in the exraction of gold using sodium cyanide.

Text Solution

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`4Au+8CN^(-)+2H_(2)O+O_(2)rarr4[Au(CN)_(2)]+4OH^(-)`
`2[Au[CN]_(2)]^(-)+Znrarr[Zn(CN)_(4)]^(2-)+2Au`
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Knowledge Check

  • A chemical reaction involves in

    A
    only breaking of bonds
    B
    only formation of bonds
    C
    both breaking and formation of bonds
    D
    none of these