1.

The stability of complex ion depend upon charge, size electronegativity of metal ion. Greater the charge of metal ion greater would be the stability. As size of metal ion decreases stability of metal ion increases complex ion more stable if chelating ligand present. Fe^(+3)+6CN^(-)hArr[Fe(CN)_(6)]^(-3),K_(1) Fe^(+2)+6CN^(-)hArr[Fe(CN)_(6)]^(-4),K_(2) : the value of K_(1) and K_(2) are

Answer»

`1.8xx10^(6),1.2xx10^(31)`
`1.8xx10^(6),1.8xx10^(6)`
`1.2xx10^(31),1.2xx10^(31)`
`1.2xx10^(31),1.8xx10^(6)`

Solution :STABILITY of complex ion, `alpha` CHARGE of metal ion `alpha=(1)/("size of metal ion")`
Hence, ORDER of stability `[Fe..(CN)_(6)]^(4-)LT[Fe..(CN)_(6)]^(3-)impliesK_(2)ltK_(1)`


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