JEE Main & Advanced Chemistry Coordination Chemistry Question Bank

done Complexes and complex stability Total Questions - 15

• question_answer1)
  Which of the following complexes has the highest stability constant at 298 K
  A)
  \[{{\left[ CdC{{l}_{4}} \right]}^{2-}}\] done clear
  B)
  \[{{\left[ CdB{{r}_{4}} \right]}^{2-}}\] done clear
  C)
  \[{{\left[ Cd{{I}_{4}} \right]}^{2-}}\] done clear
  D)
  \[{{\left[ Cd{{\left( CN \right)}_{4}} \right]}^{2-}}\] done clear
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• question_answer2)
  The most stable ion is     [AIEEE 2002]
  A)
  \[{{[Fe{{(OH)}_{3}}]}^{3-}}\] done clear
  B)
  \[{{[Fe{{(Cl)}_{6}}]}^{3-}}\] done clear
  C)
  \[{{[Fe{{(CN)}_{6}}]}^{3-}}\] done clear
  D)
  \[{{[Fe{{({{H}_{2}}O)}_{6}}]}^{3+}}\] done clear
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• question_answer3)
  The most stable complex among the following is [MP PMT 2002]
  A)
  \[{{K}_{3}}[Al{{({{C}_{2}}{{O}_{4}})}_{3}}]\] done clear
  B)
  \[[Pt{{(en)}_{2}}]C{{l}_{2}}\] done clear
  C)
  \[Ag{{(N{{H}_{3}})}_{2}}Cl\] done clear
  D)
  \[{{K}_{2}}(Ni(EDTA)]\] done clear
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• question_answer4)
  Which of the following factors tends to increase the stability of metal ion complexes
  A)
  Higher ionic radius of the metal ion done clear
  B)
  Higher charge/size ratio of the metal ion done clear
  C)
  Lower ionisation potential of the metal ion done clear
  D)
  Lower basicity of the ligand done clear
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• question_answer5)
  \[CuS{{O}_{4}}\] reacts with KCN solution and forms: [DPMT 2004]
  A)
  \[{{K}_{3}}[Cu{{(CN)}_{4}}]\] done clear
  B)
  \[Cu(CN)\] done clear
  C)
  \[Cu{{(CN)}_{2}}\] done clear
  D)
  \[{{K}_{4}}[Cu{{(CN)}_{6}}]\] done clear
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• question_answer6)
  A co-ordination complex compound of cobalt has the molecular formulae 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 with excess of \[AgN{{O}_{3}},\] \[AgCl\] precipitate. The ionic formula for this complex would be: [DPMT 2004; Kerala PMT 2004]
  A)
  \[[Co{{(N{{H}_{3}})}_{5}}(N{{O}_{2}})]C{{l}_{2}}\] done clear
  B)
  \[[Co{{(N{{H}_{3}})}_{5}}Cl][Cl(N{{O}_{2}})]\] done clear
  C)
  \[[Co{{(N{{H}_{3}})}_{4}}(N{{o}_{2}})Cl]\,[(N{{H}_{3}})Cl]\] done clear
  D)
  \[[Co{{(N{{H}_{3}})}_{5}}][{{(N{{O}_{2}})}_{2}}C{{l}_{2}}]\] done clear
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• question_answer7)
  In any ferric salt, on adding potassium ferrocyanide, a prussian blue colour is obtained, which is [BIT 1992; BHU 2002]
  A)
  \[{{K}_{3}}Fe{{(CN)}_{6}}\] done clear
  B)
  \[KFe\left[ Fe{{\left( CN \right)}_{6}} \right]\] done clear
  C)
  \[FeS{{O}_{4}}.Fe{{(CN)}_{6}}\] done clear
  D)
  \[F{{e}_{4}}{{\left[ Fe{{(CN)}_{6}} \right]}_{3}}\] done clear
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• question_answer8)
  Prussian blue is formed when [CBSE PMT 1990]
  A)
  Ferrous sulphate reacts with \[FeC{{l}_{3}}\] done clear
  B)
  Ferric sulphate reacts with \[{{K}_{4}}\left[ Fe{{(CN)}_{6}} \right]\] done clear
  C)
  Ferrous ammonium sulphate reacts with \[FeC{{l}_{3}}\] done clear
  D)
  Ammonium sulphate reacts with \[FeC{{l}_{3}}\] done clear
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• question_answer9)
  Complex salt can be made by the combination of \[{{[C{{o}^{III}}{{(N{{H}_{3}})}_{5}}Cl]}^{X}}\] with [RPMT 2000, AFMC 2002]
  A)
  \[PO_{4}^{3-}\] done clear
  B)
  \[C{{l}^{-}}\] done clear
  C)
  \[2C{{l}^{-}}\] done clear
  D)
  \[2{{K}^{+}}\] done clear
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• question_answer10)
  Which reagent can be used to identify nickel ion
  A)
  Resorcinol done clear
  B)
  Dimethyl glyoxime [DMG] done clear
  C)
  Diphenyl benzidine done clear
  D)
  Potassium ferrocyanide done clear
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• question_answer11)
  Dimethyl glyoxime forms a coloured complex with
  A)
  \[Ag\] done clear
  B)
  \[Ni\] done clear
  C)
  \[Cr\] done clear
  D)
  \[Zn\] done clear
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• question_answer12)
  Silver chloride dissolves in excess of \[N{{H}_{4}}OH\]. The cation present in this solution is [EAMCET 1998]
  A)
  \[A{{g}^{+}}\] done clear
  B)
  \[{{\left[ Ag{{\left( N{{H}_{3}} \right)}_{2}} \right]}^{+}}\] done clear
  C)
  \[{{\left[ Ag{{\left( N{{H}_{3}} \right)}_{4}} \right]}^{+}}\] done clear
  D)
  \[{{\left[ Ag{{\left( N{{H}_{3}} \right)}_{6}} \right]}^{+}}\] done clear
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• question_answer13)
  Silver sulphide dissolved in a solution of sodium cynamide to form the complex [AMU 1999]
  A)
  \[Na[Ag{{(CN)}_{2}}]\] done clear
  B)
  \[N{{a}_{3}}[Ag{{(CN)}_{4}}]\] done clear
  C)
  \[N{{a}_{5}}[Ag{{(CN)}_{6}}]\] done clear
  D)
  \[N{{a}_{2}}[Ag{{(CN)}_{2}}]\] done clear
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• question_answer14)
  Which one will give \[F{{e}^{3+}}\] ions in solution
  A)
  \[{{\left[ Fe{{\left( CN \right)}_{6}} \right]}^{3-}}\] done clear
  B)
  \[F{{e}_{2}}{{\left( S{{O}_{4}} \right)}_{3}}\] done clear
  C)
  \[{{\left[ Fe{{\left( CN \right)}_{6}} \right]}^{4-}}\] done clear
  D)
  \[N{{H}_{4}}{{(S{{O}_{4}})}_{2}}.FeS{{O}_{4}}.6{{H}_{2}}O\] done clear
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• question_answer15)
  The cation that does not form an amine complex with excess of ammonia is
  A)
  \[C{{d}^{2+}}\] done clear
  B)
  \[A{{l}^{3+}}\] done clear
  C)
  \[C{{u}^{2+}}\] done clear
  D)
  \[A{{g}^{+}}\] done clear
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