Match the compounds given In column I with oxidation state of cabalt present in it (given in column II) and assign the correct code.

Options

A. `{:(A,B,C,D),(1,2,4,3):}`
B. `{:(A,B,C,D),(4,3,2,1):}`
C. `{:(A,B,C,D),(3,1,4,2):}`
D. `{:(A,B,C,D),(4,1,3,2):}`

Answer

D

Explanation

Oxidation state of CMI (central metal ion) can be calculated by considering the oxidation state of whole molecule is equal to charge present on coordination sphere.
A. `[Co(NCS)(NH_(3))_(5)]SO_(3)`.
Let oxidation state of `Co` is x.
`x-1+5xx0= +2`
`x= +2 +1= + 3`
B. `[Co(NH_(3))_(4)Cl_(2)]SO_(4)`
Let oxidation state of `Co=x`
`rArr" "x+4xx0+2xx(-1)=+2`
`rArr" "x-2=+2`
`x=4`
C. `Na_(4)[Co(S_(2)O_(3))_(3)]`
Let oxidation state of `Co=x`
`x+3xx(-2)=-4`
`x-6= -4`
`x=-4 +6=+2`
D. `[Co(CO)_(8)]`
Let oxidation state of `Co=x`
`x-8xx0=0`
`x=0`
Hence, correct choice is (d).