Question

A complex of certain metal has the magnetic moment of 4.91 BM whereas another complex of the same metal with same oxidation state has zero magnetic moment. The metal ion could be

Solution

Correct option is

Fe2+

 

  

4 unpaired electrons in Fe2+ :

No unpaired electrons :

SIMILAR QUESTIONS

Q1

 

Other than the X-ray diffractions, how could be the following pairs of isomers be distinguished from one another by  

[Cr(NH3)6][Cr(NO2)6] and [Cr(NH3)4](NO2)2]

[Cr(NH3)2(NO2)4]

Q2

How the isomeric complexes [Co(NH3)6][Cr(NO2)6] and [Cr(NH3)6][Co(NO2)6] can be distinguished from one another by

Q3

Which of the following ions are optically active?

Q4

Which of the following polymerization isomers of the compound having empirical formula Cr(NH3)3(NO2)3 has the lowest molecular mass?

Q5

Octahedral complex of Ni (II) must be

Q6

Octahedral complex of Cr(III) will be

Q7

For the correct assignment of electronic configuration of a complex, the valence bond theory often requires the measurement of

Q8

Mn2+ forms a complex with Br ion. The magnetic moment of the complex is 5.92 B.M. What would be the probable formula and geometry of the complex? 

Q9

How many isomers are possible for the complex ion [Cr(NH3)(OH)2Cl3]2–

Q10

The EAN of metal atoms in Fe(NO)2(CO)2 and Co2(CO)8 respectively are