The d-electron configurations of Cr2+, Mn2+, Fe2+ and CO2+ are d4, d5, d6 and d7

respectively. Which one of the following will exhibit minimum paramagnetic behaviour?

(At. no. Cr = 24, Mn =25, Fe=26, CO=27)

1. [Fe(H2O)6]2+

2. [Co(H2O)6]2+

3. [Cr(H2O)6]2+

4. [Mn(H2O)6]2+

Subtopic:  VBT, CFT & their Limitations |
 71%
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NEET - 2011
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Of the following complex ions, the diamagnetic complex is:

1. [Ni(CN)4]2-                       

2. [CuCl4]2-

3. [CoF6]3-                           

4. [NiCl4]2-

Subtopic:  VBT, CFT & their Limitations |
 87%
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NEET - 2011
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The complexes [CO(NH3)6][Cr(CN)6] and [Cr(NH3)6][Co(CN)6] are examples of:

1. lonisation isomerism 2. Coordination isomerism
3. Geometrical isomerism 4. Linkage isomerism
Subtopic:  Isomerism in Coordination Compounds |
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The complex, [Pt(Py)(NH3)BrCl] will have how many geometrical isomers?

1. 4

2. 0

3. 2

4. 3

Subtopic:  Isomerism in Coordination Compounds |
 69%
From NCERT
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The complex that does not exhibit optical isomerism is:

(en-ethylenediamine)

1. [Co(en)2Cl2]+

2. [Co(NH3)3Cl3]

3. [Co(en)Cl2(NH3)2]+

4. [Co(en)3]3+

Subtopic:  Isomerism in Coordination Compounds |
 64%
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NEET - 2009
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Which of the following complex ions is expected to absorb visible light:

(At. no. Zn =30, Sc =21, Ti =22, Cr=24)

1. [Sc(H2O)3(NH3)3]3+

2. [Ti(en)2(NH3)2]4+

3. [Cr(NH3)6]3+

4. [Zn(NH3)6]2+

Subtopic:  VBT, CFT & their Limitations |
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Which of the following complexes exhibits the highest paramagnetic behaviour?

where gly = glycine, en = ethylenediamine and bpy = bipyridyl moieties

(At no : Ti = 22, V = 23, Fe= 26, Co = 27)

(1) [V(gly)2 (OH)2(NH3)2]+

(2) [Fe(en)(bpy)NH3)2]2+

(3) [Co(OX)2(OH)2]-

(4) [Ti(NH3)6]3+

Subtopic:  VBT, CFT & their Limitations |
From NCERT
NEET - 2008
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Which of the following will give a pair of enantiomorphs?

(1) [Co(NH3)4Cl2]NO2

(2) [Cr(NH3)6][Co(CN)6]

(3) [Co(en)2Cl2]CI

(4) [Pt(NH3)4][PtCl6 ]

(en =NH2CH2CH2NH2)

Subtopic:  Isomerism in Coordination Compounds |
 69%
NEET - 2007
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Copper sulphate dissolves in excess of KCN to give :

(1) CuCN

(2) [Cu(CN)4]3-

(3) [Cu(CN4]2-

(4) Cu(CN)2

Subtopic:  VBT, CFT & their Limitations |
NEET - 2006
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[Co(NH3)4(NO2)2]Cl can show:

1. Linkage isomerism, ionization isomerism and optical isomerism.
2. Linkage isomerism, ionization isomerism and geometrical isomerism.
3. Ionisation isomerism, geometrical isomerism and optical isomerism.
4. Ionisation isomerism, geometrical isomerism and optical isomerism.

Subtopic:  Isomerism in Coordination Compounds |
 76%
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