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(a) Write the chemical reactions involve...

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

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(a)` 4m+(8CN^-)+2H_2O+O_2to4[M(CN)_2]+4OH^_ 2[M(CN)_2]+Znto[Z_n(CN)_4]^2-+2Mdownarrow(M=Ag or Au)` (b) `Cu_2S+Fes`
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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

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