Atomic number of Mn, Fe, Co and Ni are 25, 26, 27 and 28 respectively. Which of the following outer orbital octahedral complexes have same number of unpaired electrons?
(a) $[M n C l_{6}]^{3 -}$
(b) $[F e F_{6}]^{3 -}$
(c) $[C o F_{6}]^{- 3 -}$
(d) $[N i (N H_{3})_{6}]^{2 +}$

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Solution

The answers are (a) $[M n C l_{6}]^{3 -}$ and (c) $[C o F_{6}]^{- 3 -}$

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

Which one of the following complexes is an outer orbital complex? [Atomic numbers: Mn = 25, Fe = 26, Co = 27, Ni= 28]

Q. Which one of the following complexes is an outer orbital complex?
(Atomic number of

M n = 25, F e = 26, C o = 27, N i = 28

)

Q. Which one of the following ions has an electronic configuration of

[A r] 3 d^{6}

(A t o m i c N u m b e r : M n = 25, F e = 26, C o = 27, N i = 28)

Q. Which of the following has the maximum number of unpaired electrons?
( Given Atomic number:

S c = 21, F e = 26, V = 23, N i = 28)

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Atomic number of Mn, Fe, Co and Ni are 25, 26, 27 and 28 respectively. Which of the following outer orbital octahedral complexes have same number of unpaired electrons? (a) [MnCl6]3− (b) [FeF6]3− (c) [CoF6]−3− (d) [Ni(NH3)6]2+

The answers are (a) [MnCl6]3− and (c) [CoF6]−3−

Atomic number of Mn, Fe, Co and Ni are 25, 26, 27 and 28 respectively. Which of the following outer orbital octahedral complexes have same number of unpaired electrons?
(a) $[M n C l_{6}]^{3 -}$
(b) $[F e F_{6}]^{3 -}$
(c) $[C o F_{6}]^{- 3 -}$
(d) $[N i (N H_{3})_{6}]^{2 +}$

The answers are (a) $[M n C l_{6}]^{3 -}$ and (c) $[C o F_{6}]^{- 3 -}$