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In which of the following complexes the ...

In which of the following complexes the nickel metal is in highest oxidation state:

A

`Ni(CO)_(4)`

B

`K_(2)NiF_(5)`

C

`[Ni(NH_(3))_(5)](BF_(4))_(2)`

D

`K_(4)[Ni(CN)_(6)]`

Text Solution

Verified by Experts

The correct Answer is:
B
Let x be the oxidation state of nickel then,
(1) `Ni(CO)_(4),x+4(0)=0 or x=0," " (2)[NiF_(6)]^(2-),x+6(-1)=-2 or x=+4,`
`(3) [Ni(NH_(3))_(6)]^(2+),x+4(0)=+2 or x=+2," " (4)[Ni(CN)_(6)]^(4-),x+6(-1)=-4 or x=+2`.
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Knowledge Check

  • In which of the following complex the nickel metal is in highest oxidation state?

    A
    `Ni(CO)_(4)`
    B
    `K_(2)NiF_(6)`
    C
    `[Ni(NH_(3))_(6)](BF_(4))_(2)`
    D
    `K_(4)[Ni(CN)_(6)]`

  • In which of the following complexes the metal ion is in zero oxidation state?

    A
    `[Cu(NH_3)_4]Cl_2`
    B
    `Zn_2[Fe(CN)_6]`
    C
    `Mn_2(CO)_(10)`
    D
    `[Ag(NH_3)_2]Cl`

  • In which of the following compounds the metal is in the lowest oxidation state

    A
    `[Co(NH_(3))_(5)Br]_(2)SO_(4)`
    B
    `Fe_(3)[Fe(CN)_(6)]_(2)`
    C
    `Mn_(2)(CO)_(10)`
    D
    `K[PtCl_(3)(C_(2)H_(4))]`

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