Multiple Choice QuestionsThe pair of species of oxygen and their magnetic behaviours are noted below. Which of the following presents the correct description?
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+
[Co(NH3)6]3+
Number of possible isomers for the complex [Co(en)2Cl2]Cl will be
(en =ethylenediamine)
2
1
3
3
The hybridization involved in complex [Ni(CN)4]2- is (Atomic number of Ni = 28)
dsp2
sp3
d2sp3
d2sp3
Which of the following complex ions is not expected to absorb visible light?
[Ni(CN)4]2-
[Cr(NH3)6]3+
[Fe(H2O)6]2+
[Fe(H2O)6]2+
Crystal field stabilisation energy for high spin d4 octahedral complex is
-1.8 Δo
-1.6 Δo + P
-1.2 Δo
-1.2 Δo
D.
-1.2 Δo
In the case of high spin complex Δo is small. Thus, the energy required to pair up the fourth electron with the electrons of lower energy d- orbitals would be higher than that required to place the electrons in the higher d -orbital. Thus pairing does not occur.
For high spin d4 octahedral complex,
therefore,
Crystal field stabilisation energy
= (-3 x 0.4 +1 x 0.6) Δo
= - (-1.2 x 0.6 )Δo
=-0.6 Δo
The existence of two different coloured complexes with the composition of [Co(NH3)4Cl2]+ is due to
linkage isomerism
geometrical isomerism
Coordination isomerism
Coordination isomerism
Which one of the following complexes is not expected to exhibit isomerism?
[Ni(NH3)(H2O)2]2+
[Pt(NH3)2Cl2]
[Ni(NH3)2Cl2]
[Ni(NH3)2Cl2]
which of the following does not show optical isomerism? (en = ethylenediamine)
[Co(en)2Cl2]+
[Co(NH3)3Cl3]0
[Co(en)Cl2(NH3)2]+
[Co(en)Cl2(NH3)2]+
which of the following complex ions is expected to absorb visible light?
(At. no.Zn = 30, Sc = 21, Ti = 22, Cr = 24)
[Sc(H2O)(NH3)3]3+
[Ti(en)2(NH3)2]4+
[Cr(NH3)6]3+
[Cr(NH3)6]3+
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