Which of the following pairs will show the same magnetic moment ('spin only')?

1. [Cr(H2O)6]3+  and [Fe(H2O)5NO]2+

2. [Mn(CN)6]4- and [Fe(CN)6]3-

3. [Ni(CO)4] and [Zn(NH3)4]2+

4.  All of these

Subtopic:  Ligands |
 63%
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Choose the incorrect statement

1.  In [FeCN6]4- Fe—C bond length is smaller than Fe—C bond length in [FeCN6]3-

2.  The EAN of Fe in [FeCN6]4- is 36

3.  [FeCN6]3-more stable than [FeCN6]4-

4.  [FePhen3]3+is more stable than [FePhen3]2+

Subtopic:  Introduction, Classification and Nomenclature |
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A solution containing 0.319 g of complex CrCl3. 6H2O was passed through a cation exchanger and the solution given out was neutralized by 28.5 ml of 0.125 M NaOH. The correct formula of the complex will be [molecular weight of complex = 266.5]

1.  [CrCl(H2O)5]Cl2 · H2O

2.  [Cr(H2O)6]Cl3

3.  [CrCl2(H2O)4]Cl ·H2O 

4.  All are correct

Subtopic:  Introduction, Classification and Nomenclature |
 58%
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The oxidation state and effective atomic number of Cr in bis(benzene) chromium are

1.  0, 36

2.  3, 35

3.  2, 36

4.  2, 35

Subtopic:  Introduction, Classification and Nomenclature |
 67%
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Consider the following complexes:

1. K2[PtCl6]

2. PtCl4.2NH3 

3. PtCl4.3NH3

4. PtCl4.5NH3

Their electrical conductances in aqueous solution respectively are:

1. 256, 0, 97, 404 2. 404, 0, 97, 256
3. 256, 97, 0, 404 4. 404, 97, 256, 0
Subtopic:  Introduction, Classification and Nomenclature |
 73%
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Zero magnetic moment of the octahedral complex K2NiF6 is due to: 

1. Low spin d6 Ni(IV) complex

2. Low spin d8 Ni(ll) complex

3. High spin d8 Ni(ll) complex

4. High spin d6 Ni(IV) complex

Subtopic:  VBT, CFT & their Limitations |
 59%
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Which of the following statements is not correct?

1.  The complexes FeH2O62+ and FeCN64- differ in the state of hybridization of iron

2.  The complexes FeH2O62+ and FeCN64- differ in the magnetic properties

3.  iron ion has the same secondary valency in the complexes FeH2O62+ and 

4.   The complex FeH2O62+ and FeCN64- differ in primary valency of iron

Subtopic:  VBT, CFT & their Limitations |
 65%
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Choose the correct match.
 

Property  \([CO(NH_3)_6Cl_3] \) \( [Co(NH_3)_6Cl_2]\)
1.  Stability   → More  Less
2.  Magnetism  → Paramagnetic Diamagnetic
3.  Hybridization  → \(\mathrm{sp}^3 \mathrm{~d}^2\) \(\mathrm{d}^2 \mathrm{sp}^3\)
4.  Complex  → outer orbital  inner orbital

Subtopic:  VBT, CFT & their Limitations |
 62%
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NiPPh34 and NiCl42-have geometry, hybridization and magnetic moments of the ions respectively

1.  Tetrahedral, tetrahedral; sp3, sp3; O, 2.82

2.  Tetrahedral, square planar; sp3, dsp2; O, 2.82

3.  Tetrahedral, octahedral; sp3, d2sp3; 2.82, O

4.  Square planar, tetrahedral; dsp2, sp3; 2.82, 2.82

Subtopic:  VBT, CFT & their Limitations |
 65%
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The geometries of [Ni(CO)4] and are [Ni(PPh3)2Cl2]  : 

1. Both square planar.

2. Tetrahedral and square planar, respectively.

3. Both tetrahedral.

4. Square planar and tetrahedral, respectively.

Subtopic:  VBT, CFT & their Limitations |
 51%
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