A Complex Of A Certain Metal Ion Has A Magnetic Moment Of 4.90 B.M. Another Complex Of The Same Metal Ion In The Same Oxidation State Has A Zero Magnetic Moment. Which Of The Following Could Be The Central Metal Ion In The Two Complexes?

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Question

A complex of a certain metal ion has a magnetic moment of 4.90 B.M. Another complex of the same metal ion in the same oxidation state has a zero magnetic moment. Which of the following could be the central metal ion in the two complexes?

Solution

Correct option is

Fe2+

 

Since the magnetic moment of the complex is 4.90 BM so it contains 4 unpaired electrons  in its oxidation state of complex.

Since another complex of the same metal ion in the same oxidation state shows zero magnetic moment, so in this complex there is no unpaired electron. 

To have either four or zero unpaired electrons in the complexes of the metal in this oxidation state is d6.  

        Mn    3d54s; Mn2+ ; 3d5   

        Fe      3d64s; Fe3+ ; 3d

        Fe      3d64s2 ; Fe2+ ; 3d6

        Cr      3d54s1 ; Cr3+ ; 3d3  

i.e., the correct option is Fe2+.

SIMILAR QUESTIONS

Q1

Which of the following is a spin paired complex ion?

Q2

Which of the following complexes does not show the geometric isomerism?

Q3

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Q4

 

Which method can be used to distinguish

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Q5

Select the complex that involves outer hybridization of central metal ion.

Q6

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Q7

 

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     1 L of mixture solution + Excess BaCl2 → ‘B’↓  

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     ‘Y’ is [Co(NH3)5Br]SO4,

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Q8

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This type of splitting of d-orbitals occurs in the formation of

Q9

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Q10

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