The volume (in mL) of 0.1 M AgNO3 required for complete precipitation of chloride ions present in 30 mL of 0.01 M solution of [Cr(H2O)5Cl]Cl2, as silver chloride is close to

1. 4

2. 6

3. 20

4. 60

Subtopic:  Introduction, Classification and Nomenclature |
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NiCl2{P(C2H5)2(C6H5)}2 exhibits temperature dependent magnetic behaviour (paramagnetic/diamagnetic). The coordination geometries of Ni2+ in the paramagnetic and diamagnetic states are respectively:

1. Tetrahedral and tetrahedral

2. square planar and square planar

3. Tetrahedral and square planar

4. Square planar and tetrahedral

Subtopic:  VBT, CFT & their Limitations |
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Consider the following complex ions P, Q and R,

P = FeF63-

Q = VH2O62+

and R= FeH2O62+

The correct order of the complex ions, according to their spin-only magnetic moment values (in B.M.) is

1. R<Q<P

2. Q<R<P

3. R<P<Q

4. Q<P<R

Subtopic:  VBT, CFT & their Limitations |
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In the complexes [Fe(H2O)6]3+, [Fe(SCN)6]3-, [Fe(C2O4)3]3- and [FeCl6]3-, more stability is shown by

1. [Fe(H2O6]3+

2. [Fe(SCN)6]-3

3 [Fe(C2O4)3]3-

4. [FeCl6]3-

Subtopic:  VBT, CFT & their Limitations |
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Ammonia forms the complex ion [Cu(NH3)4]2+ with copper ions in alkaline solutions but not in acidic solution. What is the reason for it?

1. In acidic solutions hydration protects copper ions

2. In acidic solutions protons coordinate with ammonia molecules forming ions and NH3 molecules are not available

3. In alkaline solutions insoluble Cu(OH)2 is precipitated which is soluble in excess of any alkali

4. Copper hydroxide is an amphoteric substance

Subtopic:  VBT, CFT & their Limitations |
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For octahedral complex, the value of the 'spin only' magnetic moment for one of the following configuration is 2.84 BM. The correct one is

1. d4 (in strong ligand field)

2. d4 (in weak ligand field)

3. d3 (in weak as well as in strong field)

4. d5 (in strong ligand field)

Subtopic:  VBT, CFT & their Limitations |
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In Fe (CO)5, the Fe-C bond possesses

1. ionic character

2. σ-character only

3. π-character only

4. both σ and π character

Subtopic:  Organometallic Complexes & their Uses |
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Which of the following pairs represents linkage isomers?

1. [Co(NH3)5NO3]SO4 and [Co(NH3)5SO4]NO3

2. [PtCl2)(NH3)4]Br2 and [PtBr2(NH3)4]Cl2

3. [Cu(NH3)4[PtCl4] and [Pt(NH3)4][CuCl4]

4. [Pd(PPh3)2(NCS)2 and [Pt(PPh3)2(SCN)2]

Subtopic:  Isomerism in Coordination Compounds |
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A solution containing 2.675 g of CoCl3.6NH3 (molar mass=267.5 g mol-1) is passed through a cation exhanger. The chloride ions obtained in solution were treated with excess of AgNO3 to give 4.78 g of AgCl (molar mass = 143.5 g mol-1). The formula of the complex is
(At. mass of Ag = 108 u)

1. [CoCl(NH3)5]Cl2

2. [Co(NH3)6Cl3

3. [CoCl2(NH3)4]Cl

4. [CoCl3(NH3)3]

Subtopic:  Introduction, Classification and Nomenclature | Werner’s Theory |
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Which of the following facts about the complex [Cr(NH3)6]Cl3 is wrong?

1.  The complex is an outer orbital complex.
2.  The complex gives a white precipitate with a silver nitrate solution.
3.  The complex involves d2sp3 hybridization and is octahedral in shape.
4.  The complex is paramagnetic.

Subtopic:  VBT, CFT & their Limitations |
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