Multiple Choice QuestionsThe pair in which both species have same magnetic moment (spin only value) is
[Cr(H2O)6]2+,[CoCl4]2+
[Cr(H2O)6]2+,[Fe(H2O)6]2+
[Mn(H2O)6]2+, [Cr(H2O)6]2+
[CoCl4]2-, [Fe(H2O)6]2+
The magnetic moment of K3[Fe(CN)6] is found to be 1.7 BM .How many unpaired electron (s) is/are present per molecule ?
1
2
3
4
In [Ag(CN)2]-, the number of bonds is
2
3
4
6
C.
4
Cyanide is considered, in a broad sense, to be the most potent ligand for many transition metals. The very high affinities of metals for cyanide can be attributed to its negative charge, compactness and ability to engage in -bonding. The dicyanides [M(CN)2] (M = Cu, Ag, Au) are linear in geometry.
, Thus, two cyanide ions have 4-bonds.
An aqueous solution of CoCl2 on addition of excess of concentrated HCl turns blue due to formation of
[Co(H2O)4Cl2]
[Co(H2O)2Cl4]2-
[CoCl4]2-
[Co(H2O)2Cl2]
In which of the following pairs both the complexes show optical isomerism?
cis-[Cr(C2O4)2Cl2]3-, cis-[Co(NH3)4Cl2]
[Co(en)3]Cl3, cis-[Co(en)2Cl2]Cl
[PtCl(dien)]Cl, [NiCl2Br2]2-
[Co(NO3)3(NH3)3], cis-[Pt(en)2Cl2]
The correct order for the wavelength of absorption in the visible region is
[Ni(NO2)6]4- < [Ni(NH3)6]2+ < [Ni(H2O)6]2+
[Ni(NO2)6]4- < [Ni(H2O)6]2+ < [Ni(NH3)6]2+
[Ni(H2O)6]2+ < [Ni(NH3)6]2+ < [Ni(NO2)6]4-
[Ni(NH3)6]2+ < [Ni(H2O)6]2+ < [Ni(NO2)6]4-
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