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Coordination Co...

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  • Question 1
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    Among the following complexes the one which shows zero crystal field stabilisation energy is

     

  • Question 2
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    The wavelength of light absorbed is highest in

  • Question 3
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    The CFSE for octahedral [CoCI6]4- is 18000 cm-1. Then the CFSE for tetrahedral [CoCI4]2- will be

  • Question 4
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    The crystal field splitting energy (Δo) of

    I. [CoBr6]3- II. [CoF6]3- 
    III. [Co(NCS)6]3- IV. [Co(CN)6]3- is in the order of

  • Question 5
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    A magnetic moment of 1.73 BM will be shown by one among the following

  • Question 6
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    The correct order of ligand field strength is

     

  • Question 7
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    The crystal field splitting energies (CFSE) of high spin and low spin d6 metal complexes in octahedral complex in terms of Δo respectively are

  • Question 8
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    The Δt of the following complexes follows the order

    I. [CoCI4]2-

    II. [CoBr4]2-

    III. [Co(NCS)4]2-

  • Question 9
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    In which of the following coordination entities, the magnitude Δo (CFSE in octahedral field) will be maximum ?

  • Question 10
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    The increasing order of wavelength of absorption for the complex ions

    I. [Cr(NH3)6]3+

    II. [CrCI6]3-

    III. [Cr(H2O)6]3+
    IV. [Cr(CN)6]3-

    is :

  • Question 11
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    The formula of the complex hexamminecobalt (III) chloride sulphate is

     

  • Question 12
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    The donor sites of EDTA ligand are

     

  • Question 13
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    What is the IUPAC name of compound NaBH4?

     

  • Question 14
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    Ferrocyanide ion is a type of​

     

  • Question 15
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    Valence bond theory was proposed by

     

  • Question 16
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    Comprehension Type

    Direction (Q. Nos. 16 and 17) This section contains a paragraph, describing theory, experiments, data, etc. Two questions related to the paragraph have.

    Passage

    In octahedral complexes due to repulsion between the ligands and d-orbitals, there is splitting of d-orbitals into two sets, i.e. two orbitals of higher energy called eg and three orbitals of lower energy called t2g. The difference of energy between the two sets of d-orbitals is called crystal field stabilisation energy denoted by Δo. For any given metal cation, the magnitude of Δo depends on the nature of ligands.

    Q. 

    The CFSE for d7 configuration for strong ligand field is

     

  • Question 17
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    In octahedral complexes due to repulsion between the ligands and d-orbitals, there is splitting of d-orbitals into two sets, i.e. two orbitals of higher energy called eg and three orbitals of lower energy called t2g. The difference of energy between the two sets of d-orbitals is called crystal field stabilisation energy denoted by Δo. For any given metal cation, the magnitude of Δo depends on the nature of ligands.

    Q. 

    In the following complexes of manganese, the distribution of electrons in d-orbitals of manganese

    i. [Mn(H2O)6]2+

    ii. [Mn(CN)6]4-

  • Question 18
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    Direction (Q. No. 18-19) Choices for the correct combination of elements from Column I and Column II are given as options (a), (b), (c) and (d) out of which one is correct.

    Q. 

    Match the Column I with Column II and mark the correct option from the codes given below.

     

  • Question 19
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    Match the Column I with Column II and mark the correct option from the codes given below.

     

  • Question 20
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    Direction (Q. Nos. 20-24) This section contains 5 questions. When worked out will result in an integer from 0 to 9 (both inclusive).

    Q. 

    Number of unpaired electrons in d6, low spin octahedral complex.

     

  • Question 21
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    The number of ligands which have strong crystal field splitting than

    H2O among SCN-, NCS-, EDTA4- , , , Br-, PPh3, F-

     

  • Question 22
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    The total number of unpaired electrons in the two complexes [Cr(H2O)6]2+ and [Cr(CN)6]4- having octahedral geometry are

     

  • Question 23
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    Number of unpaired electrons in t2g and eg orbitals in weak octahedral ligand fields with d7 configuration.

     

  • Question 24
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    In tetrahedral complexes having weak field ligand, pairing starts with ...... electron.

     

  • Question 25
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    Statement Type

    Direction (Q. No. 25) This section is based on Statement I and Statement II. Select the correct answer from the codes given below.

    Q. 

    Statement I : The value of CFSE for the octahedral complex [Co(NH3)6]3+ is - 2.4Δo.

    Statement II : The ammonia molecule is strong field ligand.

     

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