The correct statement, among the following, is:

1. [Co(CN)₆]^3- has no unpaired electrons and will be in a low-spin configuration.

2. [Co(CN)₆]^3- has four unpaired electrons and will be in a low-spin configuration.

3. [Co(CN)₆]^3- has four unpaired electrons and will be in a high-spin configuration.

4. [Co(CN)₆]^3- has no unpaired electrons and will be in a high-spin configuration.

Subtopic: VBT, CFT & their Limitations |

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Among the following complexes the one which shows zero crystal field stabilization energy (CFSE) is

1. $[N i (H_{2} O)_{6}]^{3 +}$

2. $[F e (H_{2} O)_{6}]^{3 +}$

3. $[C o (H_{2} O)_{6}]^{2 +}$

4. $[C o (H_{2} O)_{6}]^{3 +}$

Subtopic: VBT, CFT & their Limitations |

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An ion that has magnetic moment 2.83 BM is -

(Atomic Number: Ti=22, Cr=24, Mn=25, Ni=28)

1. $T i^{3 +}$

2. $N i^{2 +}$

3. $C r^{3 +}$

4. $M n^{2 +}$

Subtopic: VBT, CFT & their Limitations |

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An anticancer agent among the following is-

1. $mer - [Co ({NH}_{3})_{3} Cl]$

2. c $is - [{PtCl}_{2} ({NH}_{3})_{2}]$

3. c $is - K_{2} [Pt {Cl}_{2} {Br}_{2}]$

4. ${NH}_{2} {CoCl}_{4}$

Subtopic: Isomerism in Coordination Compounds |

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A magnetic moment of 1.73 BM will be shown by which one of the following:

1. [Ni(CN)₄]^2–
2. TiCl₄
3. [CoCl₆]^4–
4. [Cu(NH₃)₄]²⁺

Subtopic: VBT, CFT & their Limitations |

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An excess of AgNO₃ is added to 100 mL of a 0.01M solution of dichlorotetraaquachromium(III) chloride. The number of moles of AgCl precipitated would be:

1. 0.002
2. 0.003
3. 0.01
4. 0.001

Subtopic: Werner’s Theory |

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Which one of the following is an outer orbital complex and exhibits paramagnetic behavior?

1. $[N i (N H_{3})_{6}]^{2 +}$

2. $[Z n (N H_{3})_{6}]^{2 +}$

3. $[C r (N H_{3})_{6}]^{3 +}$

4. $[C o (N H_{3})_{6}]^{3 +}$

Subtopic: VBT, CFT & their Limitations |

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The d-electron configurations of Cr²⁺, Mn²⁺, Fe²⁺ and Co²⁺ are d⁴, d⁵, d⁶, and d⁷ respectively. Minimum paramagnetic behavior is shown by:
(At. No C = 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 |

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Of the following complex ions, which is diamagnetic in nature?

1. ${[Ni {(CN)}_{4}]}^{2 -}$

2. ${[{CuCl}_{4}]}^{2 -}$

3. ${[{CoF}_{6}]}^{3 -}$

4. ${[{NiCl}_{4}]}^{2 -}$

Subtopic: VBT, CFT & their Limitations |

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The complexes [Co(NH₃)₆][Cr(CN)₆] and [Cr(NH₃)₆][Co(CN)₆] show

1. Ionisation isomerism

2. Co-ordination isomerism

3. Geometrical isomerism

4. Linkage isomerism

Subtopic: Isomerism in Coordination Compounds |

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Select Chapter Topics:

Introduction, Classification and Nomenclature

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Werner’s Theory

Isomerism in Coordination Compounds

VBT, CFT & their Limitations

Organometallic Complexes & their Uses

E.A.N

Select Chapter Topics:

Introduction, Classification and Nomenclature

Ligands

Werner’s Theory

Isomerism in Coordination Compounds

VBT, CFT & their Limitations

Organometallic Complexes & their Uses

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Select Chapter Topics:

Introduction, Classification and Nomenclature

Ligands

Werner’s Theory

Isomerism in Coordination Compounds

VBT, CFT & their Limitations

Organometallic Complexes & their Uses

E.A.N

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