Multiple Choice QuestionsThe oxidation states of Cr in [Cr(H2O)6]Cl3,[Cr(C6H6)2], and K2[Cr(CN)2 (O)2(O2)(NH3)] respectively are :
+3, +2, and +4
+3, 0, and +6
+3, 0, and +4
+3, +4, and +6
Amongst [Ni(H2O)6]2+; [Ni(PPh3)2Cl2]; [Ni(CO)4] and [Ni(CN4)]2- the paramagnetic species are
[NiCl4]2-; [Ni(H2O)6]2+; [Ni(PPh3)2Cl2]
[Ni(CO)4]; [Ni(PPh3)2Cl2]; [NiCl4]2-
[Ni(CN4)]2- ; [Ni(H2O)6]2+ ; [NiCl4]2-
[Ni(PPh3)2Cl2] ; [Ni(CO)4]; [Ni(CN4)]2-
A.
[NiCl4]2-; [Ni(H2O)6]2+; [Ni(PPh3)2Cl2]
In [NiCl4]2- and [Ni(H2O6)]2+ ligands Cl- and H2O are weak ligands, therefore no pairing will be possible. Thus, there are two unpaired electrons.
In [Ni(Ph3)2Cl2], although PPh3 has d-acceptance nature but presence of Cl, makes electrons unpaired.
Among the following metal carbonyls, the C- O bond order is lowest in
[Mn(CO)6]+
[Fe(CO)5]
[Cr(CO)6]
[V(CO)6]-
Point out incorrect stability order
[Cu(NH3)4]2+ < [Cu(en)2]2+ < [Cu(trien)]2+
[Fe(H2O)6]3+ < [Fe(NO2)6]3- < [Fe(NH3)6]3+
[Co(H2O)6]3+ < [Rh(H2O)6]3+ < [Ir(H2O6]3+
[Cr(NH3)6]+ < [Cr(NH3)6]2+ < [Cr(NH3)6]3+
Which one of the following complexes is not expected to exhibit isomerism?
[Ni(NH3)4 (H2O)2]2+
[Pt(NH3)2Cl2]
[Ni(NH3)2Cl2]
[Ni(em)3]2+
Which of the following complex compounds will exhibit highest paramagnetic behaviour? (At. no. Ti= 22, Cr= 24, Co= 27, Zn= 30)
[Ti(NH3)6]3+
[Cr((NH3)6]3+
[Co(NH3)6]3+
[ZN(NH3)6]2+
Amongst Ni(CO)4, [Ni(CN)4]2- and
Ni(CO)4 and are diamagentic but [Ni(CN)4]2- is paramagnetic.
Ni(CO)4 and [Ni(CN)4]2- are diamagnetic but is paramagnetic.
and [Ni(CN)4]2- are diamagnetic but Ni(CO)4 is paramagnetic.
Ni(CO)4 is diamagnetic but and [Ni(CN)4]2- is paramagnetic.
In which of the following octahedral complexes of Co (At. no. 27), will the magnitude of be the highest?
[Co(CN)6]3-
[Co(C2O4)3]3-
[Co(H2O)6]3+
[Co(NH3)6]3+
The IUPAC name for the complex [Co(NO2)(NH3)5]Cl, is
nitrito-N-pentammine cobalt (III) chloride
nitrito-N-pentammine cobalt (II) chloride
pentaminenitrito-N-cobalt (II) chloride
pentaminenitrito-N-cobalt (III) chloride
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