1
AIEEE 2008
+4
-1
In which of the following octahedral complexes of Co (at. no. 27), will the magnitude of $$\Delta _o$$ be the highest?
A
[Co(CN)6]3−
B
[Co(C2O4)3]3−
C
[Co(H2O)6]3+
D
[Co(NH3)6]3+
2
AIEEE 2008
+4
-1
The coordination number and the oxidation state of the element ‘E’ in the complex [E(en)2(C2O4)]NO2 (where (en) is ethylene diamine) are, respectively,
A
6 and 2
B
4 and 2
C
4 and 3
D
6 and 3
3
AIEEE 2007
+4
-1
Which one of the following has a square planar geometry?
A
[CoCl4]2-
B
[FeCl4]2-
C
[NiCl4]2-
D
[PtCl4]2-
4
AIEEE 2006
+4
-1
The “spin-only” magnetic moment [in units of Bohr magneton, (µB)] of Ni2+ in aqueous solution would be (Atomic number of Ni = 28)
A
2.84
B
4.90
C
0
D
1.73
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