Which of the following complex ion has a magnetic moment same as ${[C r {(H_{2} O)}_{6}]}^{3 +}$ ?

{[M n {(H_{2} O)}_{6}]}^{4 +}

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{[M n {(H_{2} O)}_{6}]}^{3 +}

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{[F e {(H_{2} O)}_{6}]}^{3 +}

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

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Solution

The correct option is A ${[M n {(H_{2} O)}_{6}]}^{4 +}$
When two complexes have same number of unpaired electrons, they have same value of spin only magnetic moment.
The number of unpaired electrons present in ${[C r {(H_{2} O)}_{6}]}^{3 +}, {[M n {(H_{2} O)}_{6}]}^{4 +}, {[M n {(H_{2} O)}_{6}]}^{3 +}, {[F e {(H_{2} O)}_{6}]}^{3 +} a n d {[C u {(H_{3} N)}_{4}]}^{2 +}$ are 3,3,4, 5 and 1 respectively.
Thus the magnetic moment of ${[M n {(H_{2} O)}_{6}]}^{4 +}$ is same as that of ${[C r {(H_{2} O)}_{6}]}^{3 +}$ .

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Similar questions

Amongst the following ions which one has the highest magnetic moment value?

(i) [Cr(H₂O)₆]³⁺

(ii) [Fe(H₂O)₆]²⁺

(iii) [Zn(H₂O)₆]²⁺

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

The pair having the same magnetic moment is:

[At. No $∴$ Cr =24, Mn =25, Fe =26, Co =27]

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

[T i (H_{2} O)_{6}]^{4 +}, [M n (H_{2} O)_{6}]^{2 +}

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

X, Y

Z

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