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
  done clear
  B)
  6
  done clear
  C)
  5
  done clear
  D)
  4
  done clear
  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
  done clear
  B)
  Triammine   bromonitrochloro   platinum (IV) chloride
  done clear
  C)
  Triammine   bromochloronitro   platinum (IV) chloride
  done clear
  D)
  Triammine   nitrochlorobromo   platinum (IV) chloride
  done clear
  View Answer play_arrow

• 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)
  \[[Co{{(N{{H}_{3}})}_{4}}(N{{O}_{2}})Cl]\,[(N{{H}_{3}}Cl]\]
  done clear
  B)
  \[[Co\,(N{{H}_{3}})Cl]\,[Cl(N{{O}_{2}})]\]
  done clear
  C)
  \[[Co{{(N{{H}_{3}})}_{5}}(N{{O}_{2}})]C{{l}_{2}}\] 
  done clear
  D)
  \[[Co{{(N{{H}_{3}})}_{5}}]\,[{{(N{{O}_{2}})}_{2}}C{{l}_{2}}]\]
  done clear
  View Answer play_arrow

• question_answer4) The correct structure of \[Fe{{(CO)}_{5}}\] is : [AIPMT 2000]
  A)
  trigonal bipyramidal
  done clear
  B)
  octahedral
  done clear
  C)
  tetrahedral
  done clear
  D)
  square pyramidal
  done clear
  View Answer play_arrow

• question_answer5) Which one of the following complexes will have four different isomers?              [AIPMT 2000]
  A)
  \[[Co{{(en)}_{2}}C{{l}_{2}}]Cl\]                      
  done clear
  B)
  \[[Co(en)(N{{H}_{3}})C{{l}_{2}}]Cl\]
  done clear
  C)
  \[[Co{{(PP{{H}_{3}})}_{2}}(N{{H}_{3}})C{{l}_{2}}]Cl\]                    
  done clear
  D)
  \[[Co{{(en)}_{3}}]C{{l}_{3}}\]
  done clear
  View Answer play_arrow

• 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
  done clear
  B)
  \[{{K}_{3}}[Cu{{(CN)}_{4}}]\]  :           more stable and \[{{K}_{2}}[Cd{{(CN)}_{4}}]\]  :           less stable
  done clear
  C)
  \[{{K}_{2}}[Cu{{(CN)}_{4}}]\]  :           less stable and \[{{K}_{2}}[Cd{{(CN)}_{4}}]\]  :           more stable
  done clear
  D)
  \[{{K}_{2}}[Cu{{(CN)}_{4}}]\]  :           more stable and \[{{K}_{2}}[Cd{{(CN)}_{4}}]\]  :           less stable
  done clear
  View Answer play_arrow

• question_answer7) Which one of the following will give maximum number of isomers?               [AIPMT 2001]
  A)
  \[[Co\,(N{{H}_{3}})C{{l}_{2}}]\]
  done clear
  B)
  \[{{[Ni\,(en)\,\,{{(N{{H}_{3}})}_{4}}]}^{2+}}\]
  done clear
  C)
  \[{{[Ni\,({{C}_{2}}{{O}_{4}})\,{{(en)}_{2}}]}^{2-}}\]
  done clear
  D)
  \[{{[Cr{{(SCN)}_{2}}{{(N{{H}_{3}})}_{4}}]}^{+}}\]
  done clear
  View Answer play_arrow

• question_answer8) Coordination number of \[Ni\] in \[{{[Ni{{({{C}_{2}}{{O}_{4}})}_{3}}]}^{4-}}\] is: [AIPMT 2001]
  A)
  3
  done clear
  B)
  6
  done clear
  C)
  4
  done clear
  D)
  2
  done clear
  View Answer play_arrow

• question_answer9) Which of the following organometallic compound has \[\sigma \] and \[\pi \] bond?                 [AIPMT 2001]
  A)
  \[[Fe({{\eta }^{5}}-{{C}_{5}}{{H}_{5}}){{ & }_{2}}]\]          
  done clear
  B)
  \[K[PtC{{l}_{3}}({{\eta }^{2}}-{{C}_{2}}{{H}_{4}})]\]
  done clear
  C)
  \[{{[Co{{(CO)}_{5}}N{{H}_{3}}]}^{2+}}\]   
  done clear
  D)
  \[Fe{{(C{{H}_{3}})}_{3}}\]
  done clear
  View Answer play_arrow

• question_answer10) Which statements is incorrect?    [AIPMT 2001]
  A)
  \[Ni{{(CO)}_{4}}\]-Tetrahedral, paramagnetic      
  done clear
  B)
  \[Ni(CN)_{4}^{2-}\]-Square planar, diamagnetic
  done clear
  C)
  \[Ni{{(CO)}_{4}}\]-Tetrahedral, diamagnetic        
  done clear
  D)
  \[{{[Ni\,{{(Cl)}_{4}}]}^{2}}\]-Tetrahedral, paramagnetic
  done clear
  View Answer play_arrow

• question_answer11) Which of die following will exhibit maximum ionic conductivity?                              [AIPMT 2001]
  A)
  \[{{K}_{4}}[Fe\,{{(CN)}_{6}}]\]
  done clear
  B)
  \[[Co\,{{(N{{H}_{3}})}_{6}}]C{{l}_{3}}\]
  done clear
  C)
  \[[Cu{{(N{{H}_{3}})}_{4}}3C{{l}_{2}}\]
  done clear
  D)
  \[[Ni\,{{(CO)}_{4}}]\]
  done clear
  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)
  \[[Cr\text{ }{{(CO)}_{6}}]\]
  done clear
  B)
  \[[Fe\text{ }{{(CO)}_{5}}]\]
  done clear
  C)
   \[{{[Fe\text{ }{{(CN)}_{6}}]}^{4\,-}}\]
  done clear
  D)
  \[{{[Cr{{(N{{H}_{3}})}_{6}}]}^{3+}}\]
  done clear
  View Answer play_arrow

• question_answer13) The hypothetical complex chloro diaquatriammine cobalt (III) chloride can be represented as: [AIPMT 2002]
  A)
  \[[CoCl{{(N{{H}_{3}})}_{3}}{{({{H}_{2}}O)}_{2}}]C{{l}_{2}}\]
  done clear
  B)
  \[[Co{{(N{{H}_{3}})}_{3}}({{H}_{2}}O)C{{l}_{3}}]\]
  done clear
  C)
  \[[Co{{(N{{H}_{2}})}_{3}}{{({{H}_{2}}O)}_{2}}Cl]\]            
  done clear
  D)
  \[[Co{{(N{{H}_{3}})}_{3}}{{({{H}_{2}}O)}_{3}}]C{{l}_{3}}\]
  done clear
  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
  done clear
  B)
  more voltage is required
  done clear
  C)
  \[A{{g}^{+}}\] ions are completely removed from solution
  done clear
  D)
  less availability of \[A{{g}^{+}}\] ions, as Cu cannot displace Ag from \[{{[Ag\,{{(CN)}_{2}}]}^{-}}\] ion
  done clear
  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)
  \[{{K}_{2}}[Cu{{(CN)}_{4}}]\]
  done clear
  B)
  \[[{{K}_{3}}\,{{(CuCN)}_{4}}]\]
  done clear
  C)
  \[CuC{{N}_{2}}\]
  done clear
  D)
  \[Cu[K\text{ }Cu{{(CN)}_{4}}]\]
  done clear
  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)
  \[[M{{A}_{4}}{{B}_{2}}]\]
  done clear
  B)
  \[[M{{A}_{5}}B]\]
  done clear
  C)
  \[[M{{A}_{2}}{{B}_{4}}]\]
  done clear
  D)
  \[[M{{A}_{3}}{{B}_{3}}]\]
  done clear
  View Answer play_arrow

• question_answer17) According to IUPAC nomenclature sodium nitroprusside is named as:           [AIPMT 2003]
  A)
  sodium pentacyanonitrosyl ferrate (II)
  done clear
  B)
  sodium pentacyanonitrosyl ferrate (III)
  done clear
  C)
  sodium nitroferricyanide              
  done clear
  D)
  sodium nitroferrocyanide
  done clear
  View Answer play_arrow

• question_answer18) Among the following, which is not the \[\pi \]-bonded organometallic compound?         [AIPMT 2003]
  A)
  \[Cr{{({{\eta }^{6}}-{{C}_{6}}{{H}_{6}})}_{2}}\]
  done clear
  B)
  \[{{(C{{H}_{3}})}_{4}}Sn\]     
  done clear
  C)
  \[K[PtC{{l}_{3}}\,({{\eta }^{2}}-{{C}_{2}}{{H}_{4}})]\]        
  done clear
  D)
  \[Fe{{({{\eta }^{5}}-{{C}_{5}}{{H}_{5}})}_{2}}\]
  done clear
  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
  done clear
  B)
  zero
  done clear
  C)
  2
  done clear
  D)
  3
  done clear
  View Answer play_arrow

• question_answer20) Which of the following is considered to be ananticancer species?            [AIPMT (S) 2004]
  A)
  
  done clear
  B)
   
  done clear
  C)
  
  done clear
  D)
   
  done clear
  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
  done clear
  B)
  Diamminedinitroplatinum\[\text{(II)}\]
  done clear
  C)
  traos-dicyanobis (ethylenediamine)
  done clear
  D)
  Tris-(ethylendiamine) cobalt \[\text{(III)}\] bromide
  done clear
  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)
  \[s{{p}^{3}},ds{{p}^{2}}\,\,ds{{p}^{2}}\]
  done clear
  B)
  \[s{{p}^{3}},ds{{p}^{2}}\,\,s{{p}^{3}}\]
  done clear
  C)
  \[s{{p}^{3}},s{{p}^{3}}\,\,ds{{p}^{2}}\]
  done clear
  D)
  \[ds{{p}^{2}},s{{p}^{3}}\,\,sp\]
  done clear
  View Answer play_arrow

• question_answer23) \[C{{N}^{-}}\]is strong field ligand. This is due to the fact that:                                   [AIPMT (S) 2004]
  A)
  it carries negative charge
  done clear
  B)
  it is a pseudo halide
  done clear
  C)
  it can accept electrons from metal species
  done clear
  D)
  it forms high spin complexes with metal species
  done clear
  View Answer play_arrow

• 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    
  done clear
  B)
  five      
  done clear
  C)
  two
  done clear
  D)
  four
  done clear
  View Answer play_arrow

• question_answer25) Which of the following does not have a metal-carbon bond?                  [AIPMT (S) 2004]
  A)
  \[Al{{(O{{C}_{2}}{{H}_{5}})}_{3}}\]
  done clear
  B)
  \[{{C}_{2}}{{H}_{5}}MgBr\]   
  done clear
  C)
  \[K[Pt({{C}_{2}}{{H}_{4}})C{{l}_{3}}]\]
  done clear
  D)
  \[Ni{{(CO)}_{4}}\]
  done clear
  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)
  \[{{d}_{{{x}^{2}}-{{y}^{2}}}}{{d}_{{{z}^{2}}}}\]
  done clear
  B)
  \[{{d}_{xz}},{{d}_{{{x}^{2}}-{{y}^{2}}}}\]
  done clear
  C)
  \[{{d}_{{{z}^{2}}'}}{{d}_{xz}}\]
  done clear
  D)
  \[{{d}_{xy}},{{d}_{yz}}\]
  done clear
  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)
  \[{{[Zn\,{{(N{{H}_{3}})}_{6}}]}^{2+}}\]
  done clear
  B)
  \[{{[Cr{{(N{{H}_{3}})}_{6}}]}^{3+}}\]         
  done clear
  C)
  \[{{[Co{{(N{{H}_{3}})}_{6}}]}^{3+}}\]        
  done clear
  D)
  \[{{[Ni\,{{(N{{H}_{3}})}_{6}}]}^{2+}}\]
  done clear
  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]
  done clear
  B)
  trans-[Co(en)2 Cl2]
  done clear
  C)
  trans-[Pt (NH3)2 Cl2]
  done clear
  D)
  cis -[Co (en)2Cl2]
  done clear
  View Answer play_arrow

• question_answer29) Copper sulphate dissolves in excess of KCN to give:                            [AIPMT (S) 2006]
  A)
  CuCN
  done clear
  B)
  \[{{[Cu{{(CN)}_{4}}]}^{3-}}\]
  done clear
  C)
  \[{{[Cu{{(CN)}_{4}}]}^{2-}}\]
  done clear
  D)
  \[Cu\,{{(CN)}_{2}}\]
  done clear
  View Answer play_arrow

• question_answer30)  [NH(CH2) NHCO (CH2)4 CO]n is a: [AIPMT (S) 2006]
  A)
  co-polymer        
  done clear
  B)
  addition polymer
  done clear
  C)
  thermo-setting polymer               
  done clear
  D)
  homopolymer
  done clear
  View Answer play_arrow

• question_answer31)  [Co (NH3)4 (NO 2)2]CI exhibit its: [AIPMT (S) 2006]
  A)
  linkage isomerism, ionization isomerism and optical isomerism
  done clear
  B)
  linkage isomerism, ionization isomerism and geometrical isomerism
  done clear
  C)
  ionization isomerism, geometrical isomerism and optical isomerism
  done clear
  D)
  linkage isomerism, geometrical isomerism and optical isomerism
  done clear
  View Answer play_arrow

• 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)
  \[3d_{{{x}^{2}}-{{y}^{2}}}^{1},\,3d_{{{z}^{2}}}^{1},\,3d_{xz}^{1}\]
  done clear
  B)
  \[3d_{xy}^{1},\,3d_{{{x}^{2}}-{{y}^{2}}}^{1},\,3d_{yz}^{1}\]
  done clear
  C)
  \[3d_{xy}^{1},\,3d_{zy}^{1},\,3d_{xz}^{1}\]
  done clear
  D)
  \[3d_{xy}^{1},\,3d_{yz}^{1},\,3d_{{{z}^{2}}}^{1}\]
  done clear
  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                                              
  done clear
  B)
  [Cr(NH3)6] [Co(CN)6]
  done clear
  C)
  [Co(en)2Cl2]Cl
  done clear
  D)
  [Pt(NH3)4] [PtCl6]
  done clear
  View Answer play_arrow

• 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+
  done clear
  B)
  [Fe(H2O)6]2+             
  done clear
  C)
  [Ni(H2O)6]2+
  done clear
  D)
  [Cr(H2O)6]2+
  done clear
  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)
  \[{{[V{{(gly)}_{2}}{{(OH)}_{2}}{{(N{{H}_{3}})}_{2}}]}^{+}}\]
  done clear
  B)
  \[{{[Fe(en)(bpy){{(N{{H}_{3}})}_{2}}]}^{2+}}\]
  done clear
  C)
  \[{{[Co{{(OX)}_{2}}{{(OH)}_{2}}]}^{-}}\]
  done clear
  D)
  \[{{[Ti{{(N{{H}_{3}})}_{6}}]}^{3+}}\]
  done clear
  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)
  \[{{[Co{{({{H}_{2}}O)}_{6}}]}^{3+}}\]
  done clear
  B)
  \[{{[Co{{(N{{H}_{3}})}_{6}}]}^{3+}}\]
  done clear
  C)
  \[{{[Co{{(CN)}_{6}}]}^{3-}}\]
  done clear
  D)
  \[{{[Co{{({{C}_{2}}{{O}_{4}})}_{3}}]}^{3-}}\]
  done clear
  View Answer play_arrow

• question_answer37) Which of the following does not show optical isomerism?         (en = ethylenediamine)        [AIPMT (S) 2009]
  A)
  \[\text{1g}{{\text{m}}^{\text{-1}}}.\]
  done clear
  B)
  \[\frac{4}{3}M{{l}^{2}}\]
  done clear
  C)
  \[\frac{2}{3}M{{l}^{2}}\]
  done clear
  D)
  \[\frac{13}{3}M{{l}^{2}}\]
  done clear
  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)
  \[2\sqrt{10}kg\]
  done clear
  B)
  \[10\sqrt{2}kg\]
  done clear
  C)
  \[{{(C{{H}_{3}})}_{3}}B\]
  done clear
  D)
  \[{{(C{{H}_{3}})}_{2}}O\]
  done clear
  View Answer play_arrow

• question_answer39) Which of the following complex ions is not expected to absorb visible light?    [AIPMT (S) 2010]
  A)
  \[{{\text{ }\!\![\!\!\text{ Ni(CN}{{\text{)}}_{\text{4}}}\text{ }\!\!]\!\!\text{ }}^{\text{2-}}}\]
  done clear
  B)
  \[{{\text{ }\!\![\!\!\text{ Cr(N}{{\text{H}}_{\text{3}}}{{\text{)}}_{6}}\text{ }\!\!]\!\!\text{ }}^{\text{3+}}}\]
  done clear
  C)
  \[{{\text{ }\!\![\!\!\text{ Fe(}{{\text{H}}_{2}}\text{O}{{\text{)}}_{6}}\text{ }\!\!]\!\!\text{ }}^{\text{2+}}}\]
  done clear
  D)
  \[{{\text{ }\!\![\!\!\text{ Ni(}{{\text{H}}_{2}}\text{O}{{\text{)}}_{6}}\text{ }\!\!]\!\!\text{ }}^{\text{2+}}}\]
  done clear
  View Answer play_arrow

• question_answer40) Crystal field stabilization energy for high spin d4 octahedral complex is         [AIPMT (S) 2010]
  A)
  \[-1.8{{\Delta }_{o}}\]
  done clear
  B)
  \[-1.6{{\Delta }_{o}}+P\]
  done clear
  C)
  \[-1.2{{\Delta }_{o}}\]
  done clear
  D)
  \[-0.6{{\Delta }_{o}}\]
  done clear
  View Answer play_arrow

• question_answer41) Crystal field stabilization energy for high spin d4 octahedral complex is         [AIPMT (S) 2010]
  A)
  \[-1.8{{\Delta }_{o}}\]
  done clear
  B)
  \[-1.6{{\Delta }_{o}}+P\]
  done clear
  C)
  \[-1.2{{\Delta }_{o}}\]
  done clear
  D)
   \[-0.6{{\Delta }_{o}}\]
  done clear
  View Answer play_arrow

• 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
  done clear
  B)
  geometrical isomerism
  done clear
  C)
  coordination isomerism
  done clear
  D)
  ionisation isomerism
  done clear
  View Answer play_arrow

• question_answer43) Which one of the following complexes is not expected to exhibit isomerism?    [AIPMT (M) 2010]
  A)
  \[{{[Ni{{(N{{H}_{3}})}_{4}}{{({{H}_{2}}O)}_{2}}]}^{2+}}\]
  done clear
  B)
  \[[Pt{{(N{{H}_{3}})}_{2}}C{{l}_{2}}]\]
  done clear
  C)
  \[[Ni{{(N{{H}_{3}})}_{2}}C{{l}_{2}}]\]
  done clear
  D)
  \[{{[Ni{{(en)}_{3}}]}^{2+}}\]
  done clear
  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)
  \[{{[Fe{{({{H}_{2}}O)}_{6}}]}^{2+}}\]
  done clear
  B)
  \[{{[Co{{({{H}_{2}}O)}_{6}}]}^{2+}}\]
  done clear
  C)
  \[{{[Cr{{({{H}_{2}}O)}_{6}}]}^{2+}}\]
  done clear
  D)
  \[{{[Mn{{({{H}_{2}}O)}_{6}}]}^{2+}}\]
  done clear
  View Answer play_arrow

• question_answer45) Of the following complex ions, which is diamagnetic in nature?              [AIPMT (S) 2011]
  A)
  \[{{[Ni{{(CN)}_{4}}]}^{2-}}\]
  done clear
  B)
  \[{{[CuC{{l}_{4}}]}^{2-}}\]
  done clear
  C)
  \[{{[Co{{F}_{6}}]}^{3-}}\]
  done clear
  D)
  \[{{[NiC{{l}_{4}}]}^{2-}}\]
  done clear
  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
  done clear
  B)
  Co-ordination isomerism
  done clear
  C)
  Geometrical isomerism
  done clear
  D)
  Linkage isomerism
  done clear
  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
  done clear
  B)
  0
  done clear
  C)
  2
  done clear
  D)
  3
  done clear
  View Answer play_arrow

• question_answer48) Which of the following carbonyls will have the strongest C—O bond?     [AIPMT (M) 2011]
  A)
  \[\text{Mn(CO)}_{\text{6}}^{\text{+}}\]
  done clear
  B)
   \[\text{Cr(CO)}_{\text{6}}^{{}}\]
  done clear
  C)
  \[\text{V(CO)}_{\text{6}}^{-}\]
  done clear
  D)
  \[\text{Fe(CO)}_{5}^{{}}\]
  done clear
  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)
  \[{{[Ti{{(N{{H}_{3}})}_{6}}]}^{3+}}\]
  done clear
  B)
  \[{{[Cr{{(N{{H}_{3}})}_{6}}]}^{3+}}\]
  done clear
  C)
  \[{{[Co{{(N{{H}_{3}})}_{6}}]}^{3+}}\]
  done clear
  D)
  \[{{[Zn{{(N{{H}_{3}})}_{6}}]}^{2+}}\]
  done clear
  View Answer play_arrow

• question_answer50) Which one of the following is an outer orbital complex and exhibits paramagnetic behaviour? [AIPMT (S) 2012]
  A)
  \[{{\text{ }\!\![\!\!\text{ Ni(N}{{\text{H}}_{\text{3}}}{{\text{)}}_{\text{6}}}\text{ }\!\!]\!\!\text{ }}^{\text{2+}}}\]
  done clear
  B)
  \[{{\text{ }\!\![\!\!\text{ Zn(N}{{\text{H}}_{\text{3}}}{{\text{)}}_{\text{6}}}\text{ }\!\!]\!\!\text{ }}^{\text{2+}}}\]
  done clear
  C)
  \[{{\text{ }\!\![\!\!\text{ Cr(N}{{\text{H}}_{\text{3}}}{{\text{)}}_{\text{6}}}\text{ }\!\!]\!\!\text{ }}^{\text{3+}}}\]
  done clear
  D)
  \[{{\text{ }\!\![\!\!\text{ Co(N}{{\text{H}}_{\text{3}}}{{\text{)}}_{\text{6}}}\text{ }\!\!]\!\!\text{ }}^{\text{3+}}}\]
  done clear
  View Answer play_arrow

• 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
  done clear
  B)
  Complex has symmetrical H-bonding
  done clear
  C)
  Red complex has a tetrahedral geometry
  done clear
  D)
  Dimethylglyoxime     functions     as bin dentate ligand
  done clear
  View Answer play_arrow

• 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)
  \[\frac{-12}{5}{{\Delta }_{o}}+p\]
  done clear
  B)
  \[\frac{-12}{5}{{\Delta }_{o}}+3p\]      
  done clear
  C)
  \[\frac{-2}{5}{{\Delta }_{o}}+2p\]
  done clear
  D)
  \[\frac{-2}{5}{{\Delta }_{o}}+p\]
  done clear
  View Answer play_arrow

• question_answer53) A magnetic moment of 1.73 BM will be shown by one among the following                [NEET 2013]
  A)
  \[{{\text{ }\!\![\!\!\text{ Cu(N}{{\text{H}}_{\text{3}}}{{\text{)}}_{\text{4}}}\text{ }\!\!]\!\!\text{ }}^{\text{2+}}}\]
  done clear
  B)
  \[{{\text{ }\!\![\!\!\text{ (NiCN}{{\text{)}}_{\text{4}}}\text{ }\!\!]\!\!\text{ }}^{\text{2-}}}\]
  done clear
  C)
  \[\text{TiC}{{\text{l}}_{\text{4}}}\]
  done clear
  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.

  done clear
  View Answer play_arrow

• question_answer54) Among the following complexes, the one which shows zero crystal field stabilization energy (CFSE) is [AIPMT 2014]
  A)
  \[{{[Mn{{({{H}_{2}}O)}_{6}}]}^{3+}}\]
  done clear
  B)
  \[{{[Fe{{({{H}_{2}}O)}_{6}}]}^{3+}}\]
  done clear
  C)
  \[{{[Co{{({{H}_{2}}O)}_{6}}]}^{2+}},\]
  done clear
  D)
   \[{{[Co{{({{H}_{2}}O)}_{6}}]}^{3+}}\]
  done clear
  View Answer play_arrow

• question_answer55) Which of the following complexes is used to be as an anticancer agent?                     [AIPMT 2014]
  A)
  \[mer-[Co{{(N{{H}_{3}})}_{3}}C{{l}_{3}}]\]   
  done clear
  B)
  \[cis-[PtC{{l}_{2}}{{(N{{H}_{3}})}_{2}}]\]
  done clear
  C)
  \[cis-{{K}_{2}}[PtC{{l}_{2}}B{{r}_{2}}]\]
  done clear
  D)
  \[N{{a}_{2}}CoC{{l}_{4}}\]
  done clear
  View Answer play_arrow

• 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)
  \[CoC{{l}_{3}}.3N{{H}_{3}}\]
  done clear
  B)
  \[CoC{{l}_{3}}.\,4N{{H}_{3}}\]
  done clear
  C)
  \[CoC{{l}_{3}}.5N{{H}_{3}}\]
  done clear
  D)
  \[CoC{{l}_{3}}.6N{{H}_{3}}\]
  done clear
  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.
  done clear
  B)
  \[{{[Co{{(CN)}_{6}}]}^{3-}}\] has four unpaired electrons and will be in a low-spin configuration.
  done clear
  C)
  \[{{[Co{{(CN)}_{6}}]}^{3-}}\] has four unpaired electrons and will be in a high-spin configuration.
  done clear
  D)
  \[{{[Co{{(CN)}_{6}}]}^{3-}}\] has no unpaired electrons and will be in a high-spin configuration.
  done clear
  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
  done clear
  B)
  1                     
  done clear
  C)
  3
  done clear
  D)
  4
  done clear
  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)
  \[ds{{p}^{2}}\]
  done clear
  B)
  \[s{{p}^{3}}\] 
  done clear
  C)
  \[{{d}^{2}}s{{p}^{2}}\]
  done clear
  D)
  \[{{d}^{2}}s{{p}^{3}}\]
  done clear
  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
  done clear
  B)
  6
  done clear
  C)
  7
  done clear
  D)
  8
  done clear
  View Answer play_arrow

• question_answer61) The name of complex ion, \[{{[Fe{{(CN)}_{6}}]}^{3-}}\] is [NEET 2015 (Re)]
  A)
  hexacyanoiron (III) ion
  done clear
  B)
                                 hexacyanitoferrate (III) ion
  done clear
  C)
  tricyanoferrate (III) ion
  done clear
  D)
  hexacyanidoferrate (lll)ion
  done clear
  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)
  \[Ni{{(CO)}_{4}}\]
  done clear
  B)
  \[{{[Co{{(CO)}_{4}}]}^{\text{O}-}}\]
  done clear
  C)
  \[{{[Fe{{(CO)}_{4}}]}^{2-}}\] 
  done clear
  D)
  \[{{[Mn{{(CO)}_{6}}]}^{+}}\]
  done clear
  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)
  \[{{[Co{{(N{{H}_{3}})}_{6}}]}^{3+}},{{[Co{{(en)}_{3}}]}^{3+}},{{[Co{{({{H}_{2}}O)}_{6}}]}^{3+}}\]
  done clear
  B)
  \[{{[Co{{(en)}_{3}}]}^{3+}},{{[Co{{(N{{H}_{3}})}_{6}}]}^{3+}},{{[Co{{({{H}_{2}}O)}_{6}}]}^{3+}}\]
  done clear
  C)
  \[{{[Co{{({{H}_{2}}O)}_{6}}]}^{3+}},{{[Co{{(en)}_{3}}]}^{3+}},{{[Co{{(N{{H}_{3}}O)}_{6}}]}^{3+}}\]
  done clear
  D)
  \[{{[Co{{({{H}_{2}}O)}_{6}}]}^{3+}},{{[Co{{(N{{H}_{3}})}_{6}}]}^{3+}},{{[Co{{(e{{n}_{3}})}_{3}}]}^{3+}}\]
  done clear
  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
  done clear
  B)
  It is \[s{{p}^{3}}{{d}^{2}}\]hybridised and octahedral
  done clear
  C)
  It is \[s{{p}^{3}}{{d}^{2}}\] hybridised and tetrahedral
  done clear
  D)
  It is\[{{d}^{2}}s{{p}^{3}}\] hybridised and octahedral
  done clear
  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)
  \[2\,AgCl,3AgCl,\,1\,AgCl\]
  done clear
  B)
                                \[1\,AgCl,3AgCl,\,2\,AgCl\]
  done clear
  C)
  \[3\,AgCl,1AgCl,\,2\,AgCl\]
  done clear
  D)
  \[3\,AgCl,2AgCl,\,1\,AgCl\]
  done clear
  View Answer play_arrow

• question_answer66) Iron carbonyl, \[\text{Fe(CO}{{\text{)}}_{\text{5}}}\] is      [NEET - 2018]
  A)
  Trinuclear
  done clear
  B)
  Mononuclear
  done clear
  C)
  Tetranuclear
  done clear
  D)
  Dinuclear
  done clear
  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
  done clear
  B)
  Coordination isomerism
  done clear
  C)
  Geometrical isomerism
  done clear
  D)
  Linkage isomerism
  done clear
  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
  done clear
  B)
  Tetrahedral geometry and diamagnetic
  done clear
  C)
  Square planar geometry and diamagnetic
  done clear
  D)
  Tetrahedral geometry and paramagnetic
  done clear
  View Answer play_arrow

• question_answer69) Which of the following species is not stable? [NEET 2019]
  A)
  \[{{\left[ Sn{{(OH)}_{6}} \right]}^{2}}\]
  done clear
  B)
  \[{{\left[ SiC{{l}_{6}} \right]}^{2}}\]
  done clear
  C)
  \[{{\left[ Si{{F}_{6}} \right]}^{2}}\]
  done clear
  D)
  \[{{\left[ GeC{{l}_{6}} \right]}^{2}}\]
  done clear
  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)
  \[{{e}^{3}}t_{2}^{3}\]
  done clear
  B)
  \[{{e}^{4}}t_{2}^{2}\]
  done clear
  C)
  \[t_{2g}^{4}e_{g}^{2}\]
  done clear
  D)
  \[t_{2g}^{6}e_{g}^{0}\]
  done clear
  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)
  \[SC{{N}^{-}}<{{F}^{-}}<C{{N}^{-}}<{{C}_{2}}O_{4}^{2-}\]
  done clear
  B)
  \[{{F}^{-}}<SC{{N}^{-}}<{{C}_{2}}O_{4}^{2-}<C{{N}^{-}}\]
  done clear
  C)
  \[C{{N}^{-}}<{{C}_{2}}O_{4}^{2-}<SC{{N}^{-}}<{{F}^{-}}\]
  done clear
  D)
  \[SC{{N}^{-}}<{{F}^{-}}<{{C}_{2}}O_{4}^{2-}<C{{N}^{-}}\]   
  done clear
  View Answer play_arrow