Solved papers for NEET Chemistry NEET PYQ-Coordination Chemistry

done NEET PYQ-Coordination Chemistry Total Questions - 71

  • question_answer1) The total number of possible isomers for the complex compound \[[C{{u}^{II}}{{(N{{H}_{3}})}_{4}}][P{{t}^{II}}C{{l}_{4}}]\] [AIPMT 1998]

    A)
    3

    B)
    6

    C)
    5

    D)
    4

    View Answer play_arrow
  • question_answer2) IUPAC name of \[[Pt\,{{(N{{H}_{3}})}_{3}}\,(Br)\,(N{{O}_{2}})\,Cl]\,Ct\] is [AIPMT 1998]

    A)
    Triammine   chlorobromonitro   platinum (IV) chloride

    B)
    Triammine   bromonitrochloro   platinum (IV) chloride

    C)
    Triammine   bromochloronitro   platinum (IV) chloride

    D)
    Triammine   nitrochlorobromo   platinum (IV) chloride

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  • question_answer3) 
    A co-ordination complex compound of cobalt   has the molecular formula containing five ammonia molecules, one nitro group and two chlorine atoms for one cobalt atom. One mole of this compound produces three mole ions in an aqueous solution. On reacting this solution with excess of \[AgN{{O}_{3}}\] solution, we get two moles of \[AgCl\] precipitate.
    The ionic formula for this complex would be :                    [AIPMT 1998]

    A)
    \[[Co{{(N{{H}_{3}})}_{4}}(N{{O}_{2}})Cl]\,[(N{{H}_{3}}Cl]\]

    B)
    \[[Co\,(N{{H}_{3}})Cl]\,[Cl(N{{O}_{2}})]\]

    C)
    \[[Co{{(N{{H}_{3}})}_{5}}(N{{O}_{2}})]C{{l}_{2}}\] 

    D)
    \[[Co{{(N{{H}_{3}})}_{5}}]\,[{{(N{{O}_{2}})}_{2}}C{{l}_{2}}]\]

    View Answer play_arrow
  • question_answer4) The correct structure of \[Fe{{(CO)}_{5}}\] is : [AIPMT 2000]

    A)
    trigonal bipyramidal

    B)
    octahedral

    C)
    tetrahedral

    D)
    square pyramidal

    View Answer play_arrow
  • question_answer5) Which one of the following complexes will have four different isomers?              [AIPMT 2000]

    A)
    \[[Co{{(en)}_{2}}C{{l}_{2}}]Cl\]                      

    B)
    \[[Co(en)(N{{H}_{3}})C{{l}_{2}}]Cl\]

    C)
    \[[Co{{(PP{{H}_{3}})}_{2}}(N{{H}_{3}})C{{l}_{2}}]Cl\]                    

    D)
    \[[Co{{(en)}_{3}}]C{{l}_{3}}\]

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  • question_answer6) In the separation of \[C{{u}^{2+}}\] and \[C{{d}^{2+}}\] in 2nd group of qualitative analysis of cations, tetramine copper (II) sulphate and tetrammine cadmium (II) sulphate react with KCN to form the corresponding cyano complexes, which one of the following pairs of the complexes and their relative stability enables the separation of \[C{{u}^{2+}}\] and \[C{{d}^{2+}}\]?                               [AIPMT 2000]

    A)
    \[{{K}_{3}}[Cu{{(CN)}_{4}}]\]  :           less stable and     \[{{K}_{2}}[Cd{{(CN)}_{4}}]\]  :           more stable

    B)
    \[{{K}_{3}}[Cu{{(CN)}_{4}}]\]  :           more stable and \[{{K}_{2}}[Cd{{(CN)}_{4}}]\]  :           less stable

    C)
    \[{{K}_{2}}[Cu{{(CN)}_{4}}]\]  :           less stable and \[{{K}_{2}}[Cd{{(CN)}_{4}}]\]  :           more stable

    D)
    \[{{K}_{2}}[Cu{{(CN)}_{4}}]\]  :           more stable and \[{{K}_{2}}[Cd{{(CN)}_{4}}]\]  :           less stable

    View Answer play_arrow
  • question_answer7) Which one of the following will give maximum number of isomers?               [AIPMT 2001]

    A)
    \[[Co\,(N{{H}_{3}})C{{l}_{2}}]\]

    B)
    \[{{[Ni\,(en)\,\,{{(N{{H}_{3}})}_{4}}]}^{2+}}\]

    C)
    \[{{[Ni\,({{C}_{2}}{{O}_{4}})\,{{(en)}_{2}}]}^{2-}}\]

    D)
    \[{{[Cr{{(SCN)}_{2}}{{(N{{H}_{3}})}_{4}}]}^{+}}\]

    View Answer play_arrow
  • question_answer8) Coordination number of \[Ni\] in \[{{[Ni{{({{C}_{2}}{{O}_{4}})}_{3}}]}^{4-}}\] is: [AIPMT 2001]

    A)
    3

    B)
    6

    C)
    4

    D)
    2

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  • question_answer9) Which of the following organometallic compound has \[\sigma \] and \[\pi \] bond?                 [AIPMT 2001]

    A)
    \[[Fe({{\eta }^{5}}-{{C}_{5}}{{H}_{5}}){{ & }_{2}}]\]          

    B)
    \[K[PtC{{l}_{3}}({{\eta }^{2}}-{{C}_{2}}{{H}_{4}})]\]

    C)
    \[{{[Co{{(CO)}_{5}}N{{H}_{3}}]}^{2+}}\]   

    D)
    \[Fe{{(C{{H}_{3}})}_{3}}\]

    View Answer play_arrow
  • question_answer10) Which statements is incorrect?    [AIPMT 2001]

    A)
    \[Ni{{(CO)}_{4}}\]-Tetrahedral, paramagnetic      

    B)
    \[Ni(CN)_{4}^{2-}\]-Square planar, diamagnetic

    C)
    \[Ni{{(CO)}_{4}}\]-Tetrahedral, diamagnetic        

    D)
    \[{{[Ni\,{{(Cl)}_{4}}]}^{2}}\]-Tetrahedral, paramagnetic

    View Answer play_arrow
  • question_answer11) Which of die following will exhibit maximum ionic conductivity?                              [AIPMT 2001]

    A)
    \[{{K}_{4}}[Fe\,{{(CN)}_{6}}]\]

    B)
    \[[Co\,{{(N{{H}_{3}})}_{6}}]C{{l}_{3}}\]

    C)
    \[[Cu{{(N{{H}_{3}})}_{4}}3C{{l}_{2}}\]

    D)
    \[[Ni\,{{(CO)}_{4}}]\]

    View Answer play_arrow
  • question_answer12) Atomic number of Cr and Fe are respectively 24 and 26, which of the following is paramagnetic with the spin of electron:            [AIPMT 2002]

    A)
    \[[Cr\text{ }{{(CO)}_{6}}]\]

    B)
    \[[Fe\text{ }{{(CO)}_{5}}]\]

    C)
     \[{{[Fe\text{ }{{(CN)}_{6}}]}^{4\,-}}\]

    D)
    \[{{[Cr{{(N{{H}_{3}})}_{6}}]}^{3+}}\]

    View Answer play_arrow
  • question_answer13) The hypothetical complex chloro diaquatriammine cobalt (III) chloride can be represented as: [AIPMT 2002]

    A)
    \[[CoCl{{(N{{H}_{3}})}_{3}}{{({{H}_{2}}O)}_{2}}]C{{l}_{2}}\]

    B)
    \[[Co{{(N{{H}_{3}})}_{3}}({{H}_{2}}O)C{{l}_{3}}]\]

    C)
    \[[Co{{(N{{H}_{2}})}_{3}}{{({{H}_{2}}O)}_{2}}Cl]\]            

    D)
    \[[Co{{(N{{H}_{3}})}_{3}}{{({{H}_{2}}O)}_{3}}]C{{l}_{3}}\]

    View Answer play_arrow
  • question_answer14) In the silver plating of copper,\[K[Ag{{(CN)}_{2}}]\] is used instead of \[AgN{{O}_{3}}\]. The reason is: [AIPMT 2002]

    A)
    a thin layer of Ag is formed on Cu

    B)
    more voltage is required

    C)
    \[A{{g}^{+}}\] ions are completely removed from solution

    D)
    less availability of \[A{{g}^{+}}\] ions, as Cu cannot displace Ag from \[{{[Ag\,{{(CN)}_{2}}]}^{-}}\] ion

    View Answer play_arrow
  • question_answer15) \[CuS{{O}_{4}}\] when reacts with KCN forms CuCN. Which is insoluble in water. It is soluble in excess of KCN, due to formation of the following complex:                                  [AIPMT 2002]

    A)
    \[{{K}_{2}}[Cu{{(CN)}_{4}}]\]

    B)
    \[[{{K}_{3}}\,{{(CuCN)}_{4}}]\]

    C)
    \[CuC{{N}_{2}}\]

    D)
    \[Cu[K\text{ }Cu{{(CN)}_{4}}]\]

    View Answer play_arrow
  • question_answer16) Which one of the following octahedral complexes will not show geometrical isomerism? (A and B are monodentate ligands)              [AIPMT 2003]

    A)
    \[[M{{A}_{4}}{{B}_{2}}]\]

    B)
    \[[M{{A}_{5}}B]\]

    C)
    \[[M{{A}_{2}}{{B}_{4}}]\]

    D)
    \[[M{{A}_{3}}{{B}_{3}}]\]

    View Answer play_arrow
  • question_answer17) According to IUPAC nomenclature sodium nitroprusside is named as:           [AIPMT 2003]

    A)
    sodium pentacyanonitrosyl ferrate (II)

    B)
    sodium pentacyanonitrosyl ferrate (III)

    C)
    sodium nitroferricyanide              

    D)
    sodium nitroferrocyanide

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  • question_answer18) Among the following, which is not the \[\pi \]-bonded organometallic compound?         [AIPMT 2003]

    A)
    \[Cr{{({{\eta }^{6}}-{{C}_{6}}{{H}_{6}})}_{2}}\]

    B)
    \[{{(C{{H}_{3}})}_{4}}Sn\]     

    C)
    \[K[PtC{{l}_{3}}\,({{\eta }^{2}}-{{C}_{2}}{{H}_{4}})]\]        

    D)
    \[Fe{{({{\eta }^{5}}-{{C}_{5}}{{H}_{5}})}_{2}}\]

    View Answer play_arrow
  • question_answer19) 
    The number of unpaired electrons in me complex ion \[{{[Co{{F}_{6}}]}^{3-}}\] is:                                   [AIPMT 2003]
    (Atomic number \[Co=27\])

    A)
    4

    B)
    zero

    C)
    2

    D)
    3

    View Answer play_arrow
  • question_answer20) Which of the following is considered to be ananticancer species?            [AIPMT (S) 2004]

    A)

    B)
     

    C)

    D)
     

    View Answer play_arrow
  • question_answer21) Which of the following co-ordination compounds would exhibit optical isomerism? [AIPMT (S) 2004]

    A)
    Pentaamminenitrocobalt\[\text{(III)}\] iodide

    B)
    Diamminedinitroplatinum\[\text{(II)}\]

    C)
    traos-dicyanobis (ethylenediamine)

    D)
    Tris-(ethylendiamine) cobalt \[\text{(III)}\] bromide

    View Answer play_arrow
  • question_answer22) Among \[{{[Ni{{(CO)}_{4}}]}^{2-}},{{[Ni{{(CN)}_{4}}]}^{2-}},\]\[{{[NiC{{l}_{4}}]}^{2-}}\]species, the hybridisation states of the Ni atom are, respectively: (At. no. of Ni = 28)                                               [AIPMT (S) 2004]

    A)
    \[s{{p}^{3}},ds{{p}^{2}}\,\,ds{{p}^{2}}\]

    B)
    \[s{{p}^{3}},ds{{p}^{2}}\,\,s{{p}^{3}}\]

    C)
    \[s{{p}^{3}},s{{p}^{3}}\,\,ds{{p}^{2}}\]

    D)
    \[ds{{p}^{2}},s{{p}^{3}}\,\,sp\]

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  • question_answer23) \[C{{N}^{-}}\]is strong field ligand. This is due to the fact that:                                   [AIPMT (S) 2004]

    A)
    it carries negative charge

    B)
    it is a pseudo halide

    C)
    it can accept electrons from metal species

    D)
    it forms high spin complexes with metal species

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  • question_answer24) Considering \[{{H}_{2}}O\]as weak field ligand, the number of unpaired electrons in\[{{[Mn{{({{H}_{2}}O)}_{6}}]}^{2+}}\]will be (At. no. of \[Mn=25\]): [AIPMT (S) 2004]

    A)
    three    

    B)
    five      

    C)
    two

    D)
    four

    View Answer play_arrow
  • question_answer25) Which of the following does not have a metal-carbon bond?                  [AIPMT (S) 2004]

    A)
    \[Al{{(O{{C}_{2}}{{H}_{5}})}_{3}}\]

    B)
    \[{{C}_{2}}{{H}_{5}}MgBr\]   

    C)
    \[K[Pt({{C}_{2}}{{H}_{4}})C{{l}_{3}}]\]

    D)
    \[Ni{{(CO)}_{4}}\]

    View Answer play_arrow
  • question_answer26) In an octahedral structure, the pair of dorbitals involved in \[{{d}^{2}}s{{p}^{3}}\]hybridisation is: [AIPMT (S) 2004]

    A)
    \[{{d}_{{{x}^{2}}-{{y}^{2}}}}{{d}_{{{z}^{2}}}}\]

    B)
    \[{{d}_{xz}},{{d}_{{{x}^{2}}-{{y}^{2}}}}\]

    C)
    \[{{d}_{{{z}^{2}}'}}{{d}_{xz}}\]

    D)
    \[{{d}_{xy}},{{d}_{yz}}\]

    View Answer play_arrow
  • question_answer27) 
    Which one of the following is an inner orbital complex as well as diamagnetic in behaviour? [AIPMT (S) 2005]
                (Atomic no. : Zn = 30, Cr=24, Co=27, Ni = 28)

    A)
    \[{{[Zn\,{{(N{{H}_{3}})}_{6}}]}^{2+}}\]

    B)
    \[{{[Cr{{(N{{H}_{3}})}_{6}}]}^{3+}}\]         

    C)
    \[{{[Co{{(N{{H}_{3}})}_{6}}]}^{3+}}\]        

    D)
    \[{{[Ni\,{{(N{{H}_{3}})}_{6}}]}^{2+}}\]

    View Answer play_arrow
  • question_answer28) Which one of the following is expected to exhibit optical isomerism? (en = ethylenediamine)

    A)
    cis-[Pt (NH3)2 Cl2]

    B)
    trans-[Co(en)2 Cl2]

    C)
    trans-[Pt (NH3)2 Cl2]

    D)
    cis -[Co (en)2Cl2]

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  • question_answer29) Copper sulphate dissolves in excess of KCN to give:                            [AIPMT (S) 2006]

    A)
    CuCN

    B)
    \[{{[Cu{{(CN)}_{4}}]}^{3-}}\]

    C)
    \[{{[Cu{{(CN)}_{4}}]}^{2-}}\]

    D)
    \[Cu\,{{(CN)}_{2}}\]

    View Answer play_arrow
  • question_answer30)  [NH(CH2) NHCO (CH2)4 CO]n is a: [AIPMT (S) 2006]

    A)
    co-polymer        

    B)
    addition polymer

    C)
    thermo-setting polymer               

    D)
    homopolymer

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  • question_answer31)  [Co (NH3)4 (NO 2)2]CI exhibit its: [AIPMT (S) 2006]

    A)
    linkage isomerism, ionization isomerism and optical isomerism

    B)
    linkage isomerism, ionization isomerism and geometrical isomerism

    C)
    ionization isomerism, geometrical isomerism and optical isomerism

    D)
    linkage isomerism, geometrical isomerism and optical isomerism

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  • question_answer32) \[[Cr{{({{H}_{2}}O)}_{6}}]C{{l}_{3}}\] (at. no. of Cr = 24) has a magnetic moment of 3.83 BM, the correct distribution of 3d electrons in die chromium of the complex is :                      [AIPMT (S) 2006]

    A)
    \[3d_{{{x}^{2}}-{{y}^{2}}}^{1},\,3d_{{{z}^{2}}}^{1},\,3d_{xz}^{1}\]

    B)
    \[3d_{xy}^{1},\,3d_{{{x}^{2}}-{{y}^{2}}}^{1},\,3d_{yz}^{1}\]

    C)
    \[3d_{xy}^{1},\,3d_{zy}^{1},\,3d_{xz}^{1}\]

    D)
    \[3d_{xy}^{1},\,3d_{yz}^{1},\,3d_{{{z}^{2}}}^{1}\]

    View Answer play_arrow
  • question_answer33) 
    Which of the following will give a pair of enantiomorphs?     [AIPMT (S) 2007]
    (en = NH2 CH2 CH2 NH2)

    A)
    [Co(NH3)4Cl2]NO2                                              

    B)
    [Cr(NH3)6] [Co(CN)6]

    C)
    [Co(en)2Cl2]Cl

    D)
    [Pt(NH3)4] [PtCl6]

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  • question_answer34)     
    The d-electron configurations of Cr2+, Mn2+, Fe2+ and Ni2+ are 3d4, 3d5, 3d6 and 3d8 respectively. Which one of the following aqua complexes will exhibit the minimum paramagnetic behaviour? [AIPMT (S) 2007]
    (At. no. Cr = 24, Mn = 25, Fe = 26, Ni = 28)

    A)
    [Mn(H2O)6]2+

    B)
    [Fe(H2O)6]2+             

    C)
    [Ni(H2O)6]2+

    D)
    [Cr(H2O)6]2+

    View Answer play_arrow
  • question_answer35) 
    Which of the following complexes exhibits the highest paramagnetic behaviour? [AIPMT (S) 2008]
    where gly = glycine, en = ethylenediamine and bpy = bipyridyl moities
    (At no : Ti = 22, V = 23, Fe = 26, Co = 27)

    A)
    \[{{[V{{(gly)}_{2}}{{(OH)}_{2}}{{(N{{H}_{3}})}_{2}}]}^{+}}\]

    B)
    \[{{[Fe(en)(bpy){{(N{{H}_{3}})}_{2}}]}^{2+}}\]

    C)
    \[{{[Co{{(OX)}_{2}}{{(OH)}_{2}}]}^{-}}\]

    D)
    \[{{[Ti{{(N{{H}_{3}})}_{6}}]}^{3+}}\]

    View Answer play_arrow
  • question_answer36) In which of the following coordination entities the magnitude of \[{{\Delta }_{o}}\](CCFSE in octahedral field) will be maximum? (Atomic number Co = 27) [AIPMT (S) 2008]

    A)
    \[{{[Co{{({{H}_{2}}O)}_{6}}]}^{3+}}\]

    B)
    \[{{[Co{{(N{{H}_{3}})}_{6}}]}^{3+}}\]

    C)
    \[{{[Co{{(CN)}_{6}}]}^{3-}}\]

    D)
    \[{{[Co{{({{C}_{2}}{{O}_{4}})}_{3}}]}^{3-}}\]

    View Answer play_arrow
  • question_answer37) Which of the following does not show optical isomerism?         (en = ethylenediamine)        [AIPMT (S) 2009]

    A)
    \[\text{1g}{{\text{m}}^{\text{-1}}}.\]

    B)
    \[\frac{4}{3}M{{l}^{2}}\]

    C)
    \[\frac{2}{3}M{{l}^{2}}\]

    D)
    \[\frac{13}{3}M{{l}^{2}}\]

    View Answer play_arrow
  • question_answer38) 
    Which of the following complex ions is expected to absorb visible light?          [AIPMT (S) 2009]
    \[1m{{s}^{-2}}.\]

    A)
    \[2\sqrt{10}kg\]

    B)
    \[10\sqrt{2}kg\]

    C)
    \[{{(C{{H}_{3}})}_{3}}B\]

    D)
    \[{{(C{{H}_{3}})}_{2}}O\]

    View Answer play_arrow
  • question_answer39) Which of the following complex ions is not expected to absorb visible light?    [AIPMT (S) 2010]

    A)
    \[{{\text{ }\!\![\!\!\text{ Ni(CN}{{\text{)}}_{\text{4}}}\text{ }\!\!]\!\!\text{ }}^{\text{2-}}}\]

    B)
    \[{{\text{ }\!\![\!\!\text{ Cr(N}{{\text{H}}_{\text{3}}}{{\text{)}}_{6}}\text{ }\!\!]\!\!\text{ }}^{\text{3+}}}\]

    C)
    \[{{\text{ }\!\![\!\!\text{ Fe(}{{\text{H}}_{2}}\text{O}{{\text{)}}_{6}}\text{ }\!\!]\!\!\text{ }}^{\text{2+}}}\]

    D)
    \[{{\text{ }\!\![\!\!\text{ Ni(}{{\text{H}}_{2}}\text{O}{{\text{)}}_{6}}\text{ }\!\!]\!\!\text{ }}^{\text{2+}}}\]

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  • question_answer40) Crystal field stabilization energy for high spin d4 octahedral complex is         [AIPMT (S) 2010]

    A)
    \[-1.8{{\Delta }_{o}}\]

    B)
    \[-1.6{{\Delta }_{o}}+P\]

    C)
    \[-1.2{{\Delta }_{o}}\]

    D)
    \[-0.6{{\Delta }_{o}}\]

    View Answer play_arrow
  • question_answer41) Crystal field stabilization energy for high spin d4 octahedral complex is         [AIPMT (S) 2010]

    A)
    \[-1.8{{\Delta }_{o}}\]

    B)
    \[-1.6{{\Delta }_{o}}+P\]

    C)
    \[-1.2{{\Delta }_{o}}\]

    D)
     \[-0.6{{\Delta }_{o}}\]

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  • question_answer42) The existence of two different coloured complexes   with   the   composition   of \[{{[Co{{(N{{H}_{3}})}_{4}}C{{l}_{2}}]}^{+}}\] is due to [AIPMT (S) 2010]

    A)
    linkage isomerism

    B)
    geometrical isomerism

    C)
    coordination isomerism

    D)
    ionisation isomerism

    View Answer play_arrow
  • question_answer43) Which one of the following complexes is not expected to exhibit isomerism?    [AIPMT (M) 2010]

    A)
    \[{{[Ni{{(N{{H}_{3}})}_{4}}{{({{H}_{2}}O)}_{2}}]}^{2+}}\]

    B)
    \[[Pt{{(N{{H}_{3}})}_{2}}C{{l}_{2}}]\]

    C)
    \[[Ni{{(N{{H}_{3}})}_{2}}C{{l}_{2}}]\]

    D)
    \[{{[Ni{{(en)}_{3}}]}^{2+}}\]

    View Answer play_arrow
  • question_answer44) 
    The d-electron configurations of \[C{{r}^{2+}},M{{n}^{2+}},\] \[F{{e}^{2+}}\] and \[C{{o}^{2+}}\] are \[{{d}^{4}},{{d}^{5}},{{d}^{6}}\] and \[{{d}^{7}}\] respectively.[AIPMT (S) 2011]
    Which one of the following will exhibit minimum paramagnetic behaviour?
    (At. no. Cr = 24, Mn = 25, Fe = 26, Co = 27)

    A)
    \[{{[Fe{{({{H}_{2}}O)}_{6}}]}^{2+}}\]

    B)
    \[{{[Co{{({{H}_{2}}O)}_{6}}]}^{2+}}\]

    C)
    \[{{[Cr{{({{H}_{2}}O)}_{6}}]}^{2+}}\]

    D)
    \[{{[Mn{{({{H}_{2}}O)}_{6}}]}^{2+}}\]

    View Answer play_arrow
  • question_answer45) Of the following complex ions, which is diamagnetic in nature?              [AIPMT (S) 2011]

    A)
    \[{{[Ni{{(CN)}_{4}}]}^{2-}}\]

    B)
    \[{{[CuC{{l}_{4}}]}^{2-}}\]

    C)
    \[{{[Co{{F}_{6}}]}^{3-}}\]

    D)
    \[{{[NiC{{l}_{4}}]}^{2-}}\]

    View Answer play_arrow
  • question_answer46) The complexes \[[Co{{(N{{H}_{3}})}_{6}}][R{{(CN)}_{6}}]\] and \[[Cr{{(N{{H}_{3}})}_{6}}][Co{{(CN)}_{6}}]\] are the examples of which type of isomerism?     [AIPMT (S) 2011]

    A)
    Ionisation isomerism

    B)
    Co-ordination isomerism

    C)
    Geometrical isomerism

    D)
    Linkage isomerism

    View Answer play_arrow
  • question_answer47) The complex,\[[Pt(Py)(N{{H}_{3}})BrCl]\]will have how  many geometrical isomers?   [AIPMT (S) 2011]

    A)
    4

    B)
    0

    C)
    2

    D)
    3

    View Answer play_arrow
  • question_answer48) Which of the following carbonyls will have the strongest C—O bond?     [AIPMT (M) 2011]

    A)
    \[\text{Mn(CO)}_{\text{6}}^{\text{+}}\]

    B)
     \[\text{Cr(CO)}_{\text{6}}^{{}}\]

    C)
    \[\text{V(CO)}_{\text{6}}^{-}\]

    D)
    \[\text{Fe(CO)}_{5}^{{}}\]

    View Answer play_arrow
  • question_answer49) 
    Which of the following complex compounds will exhibit highest paramagnetic behaviour? [AIPMT (M) 2011]
    \[(At.\,no.:Ti=22,Cr=24,Co=27,Zn=30)\]

    A)
    \[{{[Ti{{(N{{H}_{3}})}_{6}}]}^{3+}}\]

    B)
    \[{{[Cr{{(N{{H}_{3}})}_{6}}]}^{3+}}\]

    C)
    \[{{[Co{{(N{{H}_{3}})}_{6}}]}^{3+}}\]

    D)
    \[{{[Zn{{(N{{H}_{3}})}_{6}}]}^{2+}}\]

    View Answer play_arrow
  • question_answer50) Which one of the following is an outer orbital complex and exhibits paramagnetic behaviour? [AIPMT (S) 2012]

    A)
    \[{{\text{ }\!\![\!\!\text{ Ni(N}{{\text{H}}_{\text{3}}}{{\text{)}}_{\text{6}}}\text{ }\!\!]\!\!\text{ }}^{\text{2+}}}\]

    B)
    \[{{\text{ }\!\![\!\!\text{ Zn(N}{{\text{H}}_{\text{3}}}{{\text{)}}_{\text{6}}}\text{ }\!\!]\!\!\text{ }}^{\text{2+}}}\]

    C)
    \[{{\text{ }\!\![\!\!\text{ Cr(N}{{\text{H}}_{\text{3}}}{{\text{)}}_{\text{6}}}\text{ }\!\!]\!\!\text{ }}^{\text{3+}}}\]

    D)
    \[{{\text{ }\!\![\!\!\text{ Co(N}{{\text{H}}_{\text{3}}}{{\text{)}}_{\text{6}}}\text{ }\!\!]\!\!\text{ }}^{\text{3+}}}\]

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  • question_answer51) Red precipitate is obtained when ethanol solution of dimethylglyoxime is added to ammonia cal Ni(II). Which of the following statements is not true?                                [AIPMT (M) 2012]

    A)
    Red complex has a square planar geometry

    B)
    Complex has symmetrical H-bonding

    C)
    Red complex has a tetrahedral geometry

    D)
    Dimethylglyoxime     functions     as bin dentate ligand

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  • question_answer52) 
    Low spin complex of d6cation in an octahedral field will have the following energy  [AIPMT (M) 2012]
    (\[{{\Delta }_{o}}=\] crystal field splitting energy in an octahedral field, P = electron pairing energy)

    A)
    \[\frac{-12}{5}{{\Delta }_{o}}+p\]

    B)
    \[\frac{-12}{5}{{\Delta }_{o}}+3p\]      

    C)
    \[\frac{-2}{5}{{\Delta }_{o}}+2p\]

    D)
    \[\frac{-2}{5}{{\Delta }_{o}}+p\]

    View Answer play_arrow
  • question_answer53) A magnetic moment of 1.73 BM will be shown by one among the following                [NEET 2013]

    A)
    \[{{\text{ }\!\![\!\!\text{ Cu(N}{{\text{H}}_{\text{3}}}{{\text{)}}_{\text{4}}}\text{ }\!\!]\!\!\text{ }}^{\text{2+}}}\]

    B)
    \[{{\text{ }\!\![\!\!\text{ (NiCN}{{\text{)}}_{\text{4}}}\text{ }\!\!]\!\!\text{ }}^{\text{2-}}}\]

    C)
    \[\text{TiC}{{\text{l}}_{\text{4}}}\]

    D)
    None of these
    [d] Magnetic moment, p. is related with number of unpaired electrons as
    \[\mu =\sqrt{n(n+2)}BM\]
    \[{{(1.73)}^{2}}=n(n+2)\]
    On solving   n = 1
    Thus, the complex/compound having one unpaired electron exhibit a magnetic moment of 1.73 BM.
    [a] In \[\ln \,{{[Cu{{(N{{H}_{3}})}_{4}}]}^{2+}}\]
                \[C{{u}^{2+}}=[Ar]3{{d}^{9}}\]
     (Although in the presence of strong field ligand \[N{{H}_{3}}\], the unpaired electron gets excited to higher energy level but it still remains unpaired).
    [b] ln \[{{[Nl{{(CN)}_{4}}]}^{2-}}\]
    \[N{{i}^{2+}}=[Ar]\,3{{d}^{8}}\]
    But \[C{{N}^{-}}\] being strong field ligand pair up the unpaired electrons and hence in this complex, number of unpaired electrons = 0.
    [c]  In \[[TiC{{l}_{4}}]\]
    \[T{{i}^{4+}}=[Ar]\] No unpaired electron.
    [d] ln \[{{[CoC{{l}_{6}}]}^{4-}}\]\[C{{o}^{2+}}=[Ar]3{{d}^{7}}\]
    It contains three unpaired electrons.
    Thus, \[{{[Co{{(N{{H}_{3}})}_{4}}]}^{2+}}\]is the complex that exhibits a magnetic moment 1.73 BM.

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  • question_answer54) Among the following complexes, the one which shows zero crystal field stabilization energy (CFSE) is [AIPMT 2014]

    A)
    \[{{[Mn{{({{H}_{2}}O)}_{6}}]}^{3+}}\]

    B)
    \[{{[Fe{{({{H}_{2}}O)}_{6}}]}^{3+}}\]

    C)
    \[{{[Co{{({{H}_{2}}O)}_{6}}]}^{2+}},\]

    D)
     \[{{[Co{{({{H}_{2}}O)}_{6}}]}^{3+}}\]

    View Answer play_arrow
  • question_answer55) Which of the following complexes is used to be as an anticancer agent?                     [AIPMT 2014]

    A)
    \[mer-[Co{{(N{{H}_{3}})}_{3}}C{{l}_{3}}]\]   

    B)
    \[cis-[PtC{{l}_{2}}{{(N{{H}_{3}})}_{2}}]\]

    C)
    \[cis-{{K}_{2}}[PtC{{l}_{2}}B{{r}_{2}}]\]

    D)
    \[N{{a}_{2}}CoC{{l}_{4}}\]

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  • question_answer56) Cobalt (III) chloride forms several octahedral complexes with ammonia. Which of the following will not give test for chloride ions with silver nitrate at 25°C?                              [NEET 2015 ]

    A)
    \[CoC{{l}_{3}}.3N{{H}_{3}}\]

    B)
    \[CoC{{l}_{3}}.\,4N{{H}_{3}}\]

    C)
    \[CoC{{l}_{3}}.5N{{H}_{3}}\]

    D)
    \[CoC{{l}_{3}}.6N{{H}_{3}}\]

    View Answer play_arrow
  • question_answer57) Which of these statements about \[{{[Co{{(CN)}_{6}}]}^{3-}}\] is true?                                   [NEET 2015 ]

    A)
    \[{{[Co{{(CN)}_{6}}]}^{3-}}\]has no unpaired electrons and will be in a low-spin configuration.

    B)
    \[{{[Co{{(CN)}_{6}}]}^{3-}}\] has four unpaired electrons and will be in a low-spin configuration.

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

    D)
    \[{{[Co{{(CN)}_{6}}]}^{3-}}\] has no unpaired electrons and will be in a high-spin configuration.

    View Answer play_arrow
  • question_answer58) Number of possible isomers for the complex \[[Co{{(en)}_{2}}C{{l}_{2}}]Cl\] will be (en = ethylenediamine) [NEET 2015 (Re)]

    A)
    2

    B)
    1                     

    C)
    3

    D)
    4

    View Answer play_arrow
  • question_answer59) The hybridisation involved in complex \[{{[Ni{{(CN)}_{4}}]}^{2-}}\]is (Atomic number of Ni = 28)  [NEET 2015 (Re)]

    A)
    \[ds{{p}^{2}}\]

    B)
    \[s{{p}^{3}}\] 

    C)
    \[{{d}^{2}}s{{p}^{2}}\]

    D)
    \[{{d}^{2}}s{{p}^{3}}\]

    View Answer play_arrow
  • question_answer60) The sum of coordination number and oxidation number of the metal M in the complex  (where, en is ethylenediamine) is               [NEET 2015 (Re)]

    A)
    9

    B)
    6

    C)
    7

    D)
    8

    View Answer play_arrow
  • question_answer61) The name of complex ion, \[{{[Fe{{(CN)}_{6}}]}^{3-}}\] is [NEET 2015 (Re)]

    A)
    hexacyanoiron (III) ion

    B)
                                   hexacyanitoferrate (III) ion

    C)
    tricyanoferrate (III) ion

    D)
    hexacyanidoferrate (lll)ion

    View Answer play_arrow
  • question_answer62) Which of the following has longest C-O bond length? (Free C-O bond length in Co is\[1.128\overset{\text{o}}{\mathop{\text{A}}}\,\]). [NEET - 2016]

    A)
    \[Ni{{(CO)}_{4}}\]

    B)
    \[{{[Co{{(CO)}_{4}}]}^{\text{O}-}}\]

    C)
    \[{{[Fe{{(CO)}_{4}}]}^{2-}}\] 

    D)
    \[{{[Mn{{(CO)}_{6}}]}^{+}}\]

    View Answer play_arrow
  • question_answer63) Correct increasing order for the wavelengths of absorption in the visible region for the complexes of \[C{{o}^{3+}}\]is                           [NEET-2017]

    A)
    \[{{[Co{{(N{{H}_{3}})}_{6}}]}^{3+}},{{[Co{{(en)}_{3}}]}^{3+}},{{[Co{{({{H}_{2}}O)}_{6}}]}^{3+}}\]

    B)
    \[{{[Co{{(en)}_{3}}]}^{3+}},{{[Co{{(N{{H}_{3}})}_{6}}]}^{3+}},{{[Co{{({{H}_{2}}O)}_{6}}]}^{3+}}\]

    C)
    \[{{[Co{{({{H}_{2}}O)}_{6}}]}^{3+}},{{[Co{{(en)}_{3}}]}^{3+}},{{[Co{{(N{{H}_{3}}O)}_{6}}]}^{3+}}\]

    D)
    \[{{[Co{{({{H}_{2}}O)}_{6}}]}^{3+}},{{[Co{{(N{{H}_{3}})}_{6}}]}^{3+}},{{[Co{{(e{{n}_{3}})}_{3}}]}^{3+}}\]

    View Answer play_arrow
  • question_answer64) Pick out the correct statement with respect \[{{[Mn{{(CN)}_{6}}]}^{3-}}\]                         [NEET-2017]

    A)
    It is \[ds{{p}^{2}}\]hybridised and square planar

    B)
    It is \[s{{p}^{3}}{{d}^{2}}\]hybridised and octahedral

    C)
    It is \[s{{p}^{3}}{{d}^{2}}\] hybridised and tetrahedral

    D)
    It is\[{{d}^{2}}s{{p}^{3}}\] hybridised and octahedral

    View Answer play_arrow
  • question_answer65) The correct order of the stoichiometries of AgCl formed when\[AgN{{O}_{3}}\]in excess is treated with the complexes : \[CoC{{l}_{3}}.6N{{H}_{3}},CoC{{l}_{3}}.5N{{H}_{3}},CoC{{l}_{3}}.4N{{H}_{3}}\] respectively is                           [NEET-2017]

    A)
    \[2\,AgCl,3AgCl,\,1\,AgCl\]

    B)
                                  \[1\,AgCl,3AgCl,\,2\,AgCl\]

    C)
    \[3\,AgCl,1AgCl,\,2\,AgCl\]

    D)
    \[3\,AgCl,2AgCl,\,1\,AgCl\]

    View Answer play_arrow
  • question_answer66) Iron carbonyl, \[\text{Fe(CO}{{\text{)}}_{\text{5}}}\] is      [NEET - 2018]

    A)
    Trinuclear

    B)
    Mononuclear

    C)
    Tetranuclear

    D)
    Dinuclear

    View Answer play_arrow
  • question_answer67) The type of isomerism shown by the complex \[\text{ }\!\![\!\!\text{ CoC}{{\text{l}}_{\text{2}}}{{\text{(en)}}_{\text{2}}}\text{ }\!\!]\!\!\text{ }\] is            [NEET - 2018]

    A)
    Ionization isomerism

    B)
    Coordination isomerism

    C)
    Geometrical isomerism

    D)
    Linkage isomerism

    View Answer play_arrow
  • question_answer68) The geometry and magnetic behaviour of the complex \[\text{ }\!\![\!\!\text{ Ni(CO}{{\text{)}}_{\text{4}}}\text{ }\!\!]\!\!\text{ }\] are       [NEET - 2018]

    A)
    Square planar geometry and paramagnetic

    B)
    Tetrahedral geometry and diamagnetic

    C)
    Square planar geometry and diamagnetic

    D)
    Tetrahedral geometry and paramagnetic

    View Answer play_arrow
  • question_answer69) Which of the following species is not stable? [NEET 2019]

    A)
    \[{{\left[ Sn{{(OH)}_{6}} \right]}^{2}}\]

    B)
    \[{{\left[ SiC{{l}_{6}} \right]}^{2}}\]

    C)
    \[{{\left[ Si{{F}_{6}} \right]}^{2}}\]

    D)
    \[{{\left[ GeC{{l}_{6}} \right]}^{2}}\]

    View Answer play_arrow
  • question_answer70) What is the correct electronic configuration of the central atom in \[{{K}_{4}}\left[ Fe{{(CN)}_{6}} \right]\]based on crystal field theory?                                [NEET 2019]

    A)
    \[{{e}^{3}}t_{2}^{3}\]

    B)
    \[{{e}^{4}}t_{2}^{2}\]

    C)
    \[t_{2g}^{4}e_{g}^{2}\]

    D)
    \[t_{2g}^{6}e_{g}^{0}\]

    View Answer play_arrow
  • question_answer71) Which of the following is the correct order of increasing field strength of ligands to form coordination compounds?            [NEET 2020]

    A)
    \[SC{{N}^{-}}<{{F}^{-}}<C{{N}^{-}}<{{C}_{2}}O_{4}^{2-}\]

    B)
    \[{{F}^{-}}<SC{{N}^{-}}<{{C}_{2}}O_{4}^{2-}<C{{N}^{-}}\]

    C)
    \[C{{N}^{-}}<{{C}_{2}}O_{4}^{2-}<SC{{N}^{-}}<{{F}^{-}}\]

    D)
    \[SC{{N}^{-}}<{{F}^{-}}<{{C}_{2}}O_{4}^{2-}<C{{N}^{-}}\]   

    View Answer play_arrow

Study Package

NEET PYQ-Coordination Chemistry
 

   


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