Zn2+ + 4NH3  ZnNH342+. The concentration of free Zn2+ ions in a solution of the complex ion ZnNH342+ can be increased significantly by the addition of

1.  H2O

2.  HCl(aq)

3.  NH3aq

4.  NH4Claq

Subtopic:  Introduction, Classification and Nomenclature |
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Given the following pair of isomers:
[Cr(NH3)6][Cr(NO2)6] and
[Cr(NH3)4(NO2)2][Cr(NH3)2(NO2)4]
Aside from X-ray diffraction, how could the following pairs of isomers be distinguished from one another?

1. Cryoscopic method
2. Measuring their molar conductance
3. Measuring their magnetic moments
4. Observing their colors

Subtopic:  Introduction, Classification and Nomenclature |
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The hybridizations of NiCO4 and CrH2O)62+, respectively, are : 

1.  sp3 and d3sp2

2.  dsp2 and d2sp3

3.  sp3 and d2sp3

4.  dsp2 and sp3d2

Subtopic:  VBT, CFT & their Limitations |
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Which of the following is true about the complex PtCl2NH3 (H20); [Atomic number of Pt = 78]

I.  It will have two geometrical isomeric forms, cis and trans

II.  The hybridization state of Pt(ll) is sp3

III.  It is a square planar complex

IV.  It is a diamagnetic complex

V.  It can show hydrate isomerism

VI.  It is a tetrahedral complex

1.  I, III, IV

2.  II, IV, V

3.  II, V, IV

4.  I, V, IV

Subtopic:  VBT, CFT & their Limitations |
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Correct statement among the following regarding NiCO4NiCN42- and NiCl42- is -

1.  NiCO4 and NiCl42- are diamagnetic and NiCN42- is paramagnetic

2.  NiCl42- and NiCN42- are diamagnetic and NiCO4 is paramagnetic

3.  NiCO4 and NiCN42- are diamagnetic and NiCl42- is paramagnetic

4.  NiCO4 is diamagnetic and NiCl42- and NiCN42- are paramagnetic

Subtopic:  VBT, CFT & their Limitations |
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Among the following statements, the correct statement is/are -

a.  NiH2O62+ and NiNH362+ have the same value of CFSE

b.  NiH2O62+ and NiNH362+ have the same value of the magnetic moment

c.  NiH2O62+ and NiNH362+ have the same hybridization of nickel

1.  a & c only

2.  b & c only

3.  a & b only

4. All of the above

Subtopic:  VBT, CFT & their Limitations |
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Which is the correct electronic configuration for the complex NiNH362+?

1.  t2g4 eg2

2.  t2g6 eg2

3.  t2g7 eg1

4.  t2g4 eg4

Subtopic:  VBT, CFT & their Limitations |
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A compound is made by mixing cobalt (III) nitrate and potassium nitrite solution in the ratio of 1 : 3. The aqueous solution of the compound showed 4 particles per molecule whereas molar conductivity reveals the presence of six electrical. charges. The formula of the compound is

1.  CoNO23 · 2KNO2

2.  CoNO23 · 3KNO2

3.  K3CoNO26

4.  KCoNO24

Subtopic:  Introduction, Classification and Nomenclature |
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0.001 mole of [CoNH35NO3 SO4] was passed through a cation exchanger and the acid coming out of it required 20 ml of 0.1 M NaOH for neutralization. Hence, the complex is

1.  CoNH35SO4NO3

2.  CoNH35 NO3SO4

3.  CoNH35SO4NO3SO4

4.  All of these

Subtopic:  Introduction, Classification and Nomenclature |
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Which of the following statements is correct regarding the chirality (optical isomerism) of the cis and a trans isomer of the type Maa2b2 (M stands for metal, aa is a bidentate ligand, and b is a chiral ligand)?

             

(1)  The trans form is achiral and optically inactive while the cis form is chiral and exists in two enantiomeric forms

(2)  Both cis and transforms are achiral and optically inactive

(3)  The transform is chiral and exists in two enantiomeric forms while the cis form is achiral and optically inactive

(4)  Both the cis and transform are chiral and each exists in two enantiomeric form

Subtopic:  Isomerism in Coordination Compounds |
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