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Arrange the following in increasing valu...

Arrange the following in increasing value of magnetic moments.
(i) `[Fe(Cn)_6]^(4-)` (ii) ` [Fe(CN)_6]^(3-)`
(iii) `[Cr(NH_3)_6]^(3+)` (iv) `[Ni(H_2O)_4]^(2+)`

A

I,III

B

I,II

C

III,IV

D

only IV

Text Solution

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The correct Answer is:
B
I,II
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Transition metals and many of their compounds show paramagnetic behaviour where there are unpaired electron or electrons. The magnetic moment arises from the spin and orbital motions in ions or molecule. Magnetic moment of n unpaired electrons is given as mu=sqrt(n(n+2)) Bohr magneton Magnetic moment increases as the number of unpaired electrons increases. Q. Increasing value of magnetic moment of (I) [Fe(CN)_6]^(4-) (II) [Fe(CN)_6]^(3-) , (III) [Cr(NH_3)_6]^(3+) (IV) [Ni(H_2O)_4]^(2+) is:

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DISHA PUBLICATION-COORDINATION COMPOUNDS -Exercise
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  11. Which of the following complex ion(s) is/are not expected to absorb vi...

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  13. The oxidation number of Co in the complex ion

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  18. Among the following, which is not the pi-bonded organometallic compoun...

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