The $d-$ electron configurations of $Cr^{2+}, Mn^{2+}, Fe^{2+}$ and $Co^{2+}$ are $d^4, d^5, d^6$ and $d^7$ respectively. Which one of the following will exhibit the lowest paramagnetic behaviour? (Atomic no. $Cr = 24, Mn = 25, Fe = 26, Co = 27$).
- A$[Co(H_2O)_6]^{2+}$
- B$[Cr(H_2O)_6]^{2+}$
- C$[Mn(H_2O)_6]^{2+}$
- D$[Fe(H_2O)_6]^{2+}$
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The number of geometrical isomers of a planar complex $M_{abcd}$ is
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View SolutionThe pair of complexes $[(C_6H_5)_2Pd(SCN)_2]$ and $[(C_6H_5)_2Pd(NCS)_2]$ represents which type of isomerism?
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View SolutionIdentify the complex compound$(s)$ which is/are optically active and whose optical activity does not depend upon the orientation of the ligands around the metal cation:
$(i). [CoCl_3(NH_3)_3]$
$(ii). [Co(en)_3]Cl_3$
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$(iv). [CrCl_2(NH_3)_2(en)]^+$
$(i). [CoCl_3(NH_3)_3]$
$(ii). [Co(en)_3]Cl_3$
$(iii). [Co(C_2O_4)_2(NH_3)_2]^-$
$(iv). [CrCl_2(NH_3)_2(en)]^+$
Which complex among the following has the highest value of spin only magnetic moment?
$[Fe(CN)_6]^{3-}, [Fe(CN)_6]^{4-}, [Ni(CN)_4]^{2-}, [NiCl_4]^{2-}$
$[Fe(CN)_6]^{3-}, [Fe(CN)_6]^{4-}, [Ni(CN)_4]^{2-}, [NiCl_4]^{2-}$
Which of the following complexes is colorless?
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