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Coordination Compounds Test - 4

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Coordination Compounds Test - 4
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Weekly Quiz Competition
  • Question 1
    1 / -0
    Vitamin B12 is a complex of
  • Question 2
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    A group of atoms can function as a ligand only when

    Solution

    Ligands are the ions/molecules bound to the central metal atom/ion in a coordination entity. These may be simple ions like Cl-, small molecules like NH3, large molecules like ethane-1.2-diamine or even macromolecules like proteins. A ligand must be able to donate a pair of electrons to the central metal atom/ion and thus they act as lewis bases.

  • Question 3
    1 / -0
    According to the postulates of Werner's theory, for coordination compounds,
  • Question 4
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    Which of the following represents a chelate ligand?

    Solution

    When a di- or polydentate ligand uses its two or more donor atoms to bind to a single metal atom/ion, it is said to be a chelate ligand. Ethane-1,2-diamine (NH2CH2CH2NH2) can act as a chelate ligand as it is a didentate ligand. 

  • Question 5
    1 / -0
    The total number of possible isomers (cis-trans and optical) of  is
  • Question 6
    1 / -0

    Which among the following is an ambidentate ligand?

    Solution

    Ambidentate ligands are those ligands which can ligate through two different atoms. Nitrito is an ambidentate ligand as it can coordinate to the central metal atom/ion through O in nitrito-O i.e. ONO− and through N in nitrito-N i.e. NO2−.

  • Question 7
    1 / -0
    Ethylenediaminetetraacetate ion is a
  • Question 8
    1 / -0
    Which of the following statements is not correct?
  • Question 9
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    Directions: In the following question, a statement of Assertion is given; followed by a corresponding statement of Reason just below it. Mark the correct answer as:

    (a)    If both assertion and reason are true and reason is the correct explanation of assertion
    (b)    If both assertion and reason are true, but reason is not the correct explanation of assertion
    (c)    If assertion is true statement, but reason is false
    (d)    If both assertion and reason are false

    Assertion: [Ni(en)3Cl2]Cl2 (en = ethylene diamine) has lower stability than [Ni(NH3)6Cl2].
    Reason: In [Ni(en)3Cl2], the geometry of Ni is trigonal bipyramidal.
  • Question 10
    1 / -0
    The IUPAC name of the complex [Ni(NH3)4] [NiCl4] is
  • Question 11
    1 / -0
    Nickel (Z = 28) combines with an uninegative monodentate ligand X- to form a paramagnetic complex [NiX4 ]2-.

    State the number of unpaired electrons in nickel and geometry of this complex ion.
  • Question 12
    1 / -0
    An example of chelating ligand is       
  • Question 13
    1 / -0
    The ligand (en) is an example of a
  • Question 14
    1 / -0
    IUPAC name of [Ni(CO)4] is
  • Question 15
    1 / -0
    The oxidation state of Cr in K[Cr(NH3)3Cl3] is 
  • Question 16
    1 / -0
    Which of the following square-planar complexes shows cis-trans isomerism?
  • Question 17
    1 / -0
    The number of geometrical isomers of [Cr(NH3)(OH)2Cl3]2– ion is
  • Question 18
    1 / -0
    Which of the following complexes is/are of low spin?                          
  • Question 19
    1 / -0

    Ligand en is an example of

    Solution

    A ligand which can bind through two donor atoms is called a didentate ligand like en or ethane-1,2-diamine (NH2CH2CH2NH2) which has two donor N atoms.

  • Question 20
    1 / -0
    The coordination number of Co in the complex compound [Co(NH3)6]CI3 is
  • Question 21
    1 / -0

    The coordination number of Cr in [Cr(NH3)3(H2O)3]Cl3 is

    Solution

    Coordination number of the central metal atom/ion is equal to number of neutral molecules or negative ions bound to the central metal atom/ion by non-ionisable secondary linkages. These neutral molecules or negative ions are the ones which are shown inside the square bracket. Here there are 3 NH3 molecules and 3 H2O molecules associated with Cr inside the bracket. So the coordination number of Cr is 6.

  • Question 22
    1 / -0
    In the complex K4[Fe(CN)6], the effective atomic number (in amu) is
  • Question 23
    1 / -0
    Which of the following statements is incorrect for [Fe (H2O)5NO]+2?
  • Question 24
    1 / -0
    An example of a complex compound with a central atom having a coordination number 4 is:
  • Question 25
    1 / -0
    Which of the following complexes is an outer orbital complex?
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