Which of the following is not correctly matched?
Complex ion CFSE
a $[C o (N H_{3})_{6}]^{3 +}$ $24 D q$
b $[C r (N H_{3})_{6}]^{3 +}$ $12 D q$
c $[F e F_{6}]^{3 -}$ $4 D q$
d $[F e (C N)_{6}]^{3 -}$ $20 D q$

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Solution

a) [Co(NH3)6]3+ low spin d6
Therefore, first option is incorrectly matched.

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Similar questions

Q. How many in each of the following complexes obey the rule of

18

(EAN rule)?

(a)

[C u (N H_{3})_{4}]^{2 +}, [C u (e n)_{3}]^{2 +}, [C u (C N)_{4}]^{3 -}

(b)

[F e (C N)_{6}]^{4 -}, [F e (C N)_{6}]^{3 -}, F e (C O)_{6}

(c)

[N i (N H_{3})_{6}]^{2 +}, [N i (C N)_{4}]^{2 -}, [N i (C O)_{4}]

(d)

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

(e)

[C o (N H_{3})_{6}]^{3 +}, [C o C l_{4}]^{2 -}

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

Q. Match List-I with List-II and select the correct answer using the codes given below:

List I	List II
(I) $[F e F_{6}]^{3 -}$	(A) $1.73 B M$
(II) $[T i (H_{2} O)_{6}]^{3 +}$	(B) $5.93 B M$
(III) $[C r (N H_{3})_{6}]^{3 +}$	(C) $0.00 B M$
(IV) $[N i (H_{2} O)_{6}]^{2 +}$	(D) $2.83 B M$
(V) $[F e (C N)_{6}]^{4 -}$	(E) $3.88 B M$

Q. In which of the following complex ions will the metal ion have

t_{2 g}^{6} e_{g}^{0}

configuration according to CFT?

Q. If which of the following orders the given complex ions are arranged correctly with respect to their decreasing spin only magnetic moment?
(i)

[F e F_{6}]^{3 -}

(ii)

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

(iii)

[N i C l_{4}]^{2 -}

(iv)

[C u (N H_{3})_{4}]^{2 +}

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	Complex ion	CFSE
a	$[C o (N H_{3})_{6}]^{3 +}$	$24 D q$
b	$[C r (N H_{3})_{6}]^{3 +}$	$12 D q$
c	$[F e F_{6}]^{3 -}$	$4 D q$
d	$[F e (C N)_{6}]^{3 -}$	$20 D q$

Which of the following is not correctly matched?Complex ionCFSEa[Co(NH3)6]3+24 Dqb[Cr(NH3)6]3+12 Dqc[FeF6]3−4 Dqd[Fe(CN)6]3−20 Dq

a) [Co(NH3)6]3+[Co(NH3)4]3+ low spin d6d6Therefore, first option is incorrectly matched.

Which of the following is not correctly matched?
Complex ion CFSE
a $[C o (N H_{3})_{6}]^{3 +}$ $24 D q$
b $[C r (N H_{3})_{6}]^{3 +}$ $12 D q$
c $[F e F_{6}]^{3 -}$ $4 D q$
d $[F e (C N)_{6}]^{3 -}$ $20 D q$

a) [Co(NH3)6]3+ low spin d6
Therefore, first option is incorrectly matched.