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Coordination Compounds Test - 12

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Coordination Compounds Test - 12
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Weekly Quiz Competition
  • Question 1
    1 / -0

    When SCN- is added to an aqueous solution containing Fe(NO3)3, the complex ion produced is

    Solution

    Fe3+ + SCN- + H2O → [Fe (OH2)5SCN] 2+

     

  • Question 2
    1 / -0

    Which of the following complexes are heteroleptic?

    a. [Cr(NH3)6]3+
    b. [Fe(NH3)4Cl2]+
    c. [Mn(CN)6]4-
    d. [Co(NH3)4Cl2]+

    Solution

    Complexes in which a metal is bound to more than one kind of donor groups, e.g. [Co(NH3)4Cl2]+ and [Fe(NH3)4Cl2]+, are known as heteroleptic.

     

  • Question 3
    1 / -0

    The correct IUPAC name of the complex [Co(NH3)4(H2O)Cl]Cl2 is

    Solution

    The correct IUPAC name of the complex [Co(NH3)4(H2O)Cl]Cl2 is tetraammineaquachloridocobalt(III) chloride.

     

  • Question 4
    1 / -0

    The formula of dichlorobis(urea) copper (II) is

    Solution

    The formula of dichlorobis(urea) copper (II) is [CuCl2{O=C(NH2)2}2].

     

  • Question 5
    1 / -0

    Which of the following will give the maximum number of isomers?

    Solution

    [Cr(SCN)2(NH3)4]+ shows linkage, geometrical and optical isomers.

     

  • Question 6
    1 / -0

    Square planar complexes of the type MABXL (A, B, X and L are unidentates) show

    Solution

    Square planar complexes of the type MABXL (where A, B, X, L are unidentates) show three isomers - two cis and one trans.

     

  • Question 7
    1 / -0

    The complexes [Co(NH3)6][Cr(CN)6] and [Cr(NH3)6][Co(CN)6] are the examples of which type of isomerism?

    Solution

    Coordination isomerism occurs in compounds containing both cationic and anionic entities and the isomers differ in the distribution of ligands in the coordination entity of cationic and anionic parts. For example, [Co(NH3)6][Cr(CN)6] and [Cr(NH3)6][Co(CN)6].

     

  • Question 8
    1 / -0

    An aqueous pink solution of cobalt(II) chloride changes to deep blue on addition of excess of HCl. This is because

    a. [Co(H2O)6]2+ is transformed into [CoCl6]4-
    b. [Co(H2O)6]2+ is transformed into [CoCl4]2-
    c. tetrahedral complexes have smaller crystal field splitting than octahedral complexes
    d. tetrahedral complexes have larger crystal field splitting than octahedral complexes

    Solution

    An aqueous pink solution of cobalt(II) chloride changes to deep blue on addition of excess of HCl. This is because tetrahedral complexes have smaller crystal field splitting than octahedral complexes. Hence, light of longer wave lengths is absorbed and that of shorter ave length (shades of blue) is transmitted.

     

  • Question 9
    1 / -0

    Match the following:

    Column I (Complex ion) Column II (Colour)
    A. [Co(NH3)6]3+ 1. Violet
    B. [Ti(H2O)6]3+ 2. Green
    C. [Ni(H2O)6]2+ 3. Pale blue
    D. [Ni(H2O)4(en)]2+ (aq) 4. Yellowish-orange
    5. Blue
    Solution
    Column I (Complex ion) Column II (Colour)
    [Co(NH3)6]3+ Yellowish-orange
    [Ti(H2O)6]3+ Pale blue
    [Ni(H2O)6]2+ Green
    [Ni(H2O)4(en)]2+ (aq) Violet


     

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