The complex ion which has no d electrons in the central metal atom is: (At no. $C r = 24, M n = 25, F e = 26, C o = 27$ )

{[M n O_{4}]}_{4}^{-}

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{[C o {(N H_{3})}_{6}]}_{6}^{3 +}

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{[F e {(C N)}_{6}]}_{6}^{3 -}

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{[C r {(H_{2} O)}_{6}]}_{6}^{3 +}

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Solution

The correct option is A ${[M n O_{4}]}_{4}^{-}$
$M n O_{4}^{-}$ , has $M n^{+ 7}, d^{0}$ configuration so no $d$ electron.
$C o^{+ 3}, d^{6}$ configuration.
$F e^{+ 2}, d^{6}$ configuration.
$C r^{+ 3}, d^{3}$ configuration.

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Similar questions

Atomic number of Mn. Fe and Co are 25, 26 and 27 respectively. Which of the following inner orbital octahedral complex ions are diamangetic?
(a) $[C o (N H_{3})_{6}]^{3 +}$
(b) $[M n (C N)_{6}]^{3 -}$
(c) $[F e (C N)_{6}]^{4 -}$
(d) $[F e (C N)_{6}]^{3 -}$

For the four successive transition elements (Cr, Mn, Fe and Co), what is the order of stability of their +2 states?

(At. Nos. Cr = 24, Mn = 25, Fe = 26, Co = 27)

Q. The pair having the same magnetic moment is:
[At. No.:

C r = 24, M n = 25, F e = 26, C o = 27]

Q. The complex ion which has no

^{'} d^{'}

electrons in the central metal atom is:

The pair having the same magnetic moment is :
[At. No.: Cr=24, Mn=25, Fe=26, Co=27]

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The complex ion which has no d electrons in the central metal atom is: (At no. Cr=24,Mn=25,Fe=26,Co=27)

The correct option is A [MnO4]−MnO−4, has Mn+7,d0 configuration so no d electron.Co+3,d6 configuration.Fe+2,d6 configuration.Cr+3,d3 configuration.

The complex ion which has no d electrons in the central metal atom is: (At no. $C r = 24, M n = 25, F e = 26, C o = 27$ )

The correct option is A ${[M n O_{4}]}_{4}^{-}$
$M n O_{4}^{-}$ , has $M n^{+ 7}, d^{0}$ configuration so no $d$ electron.
$C o^{+ 3}, d^{6}$ configuration.
$F e^{+ 2}, d^{6}$ configuration.
$C r^{+ 3}, d^{3}$ configuration.