Coordination Compounds PYQs Set 2 (PDF)

Set 2 of 20 · Questions 31-60 of 596

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Mere Teacher · Previous Year Questions JEE Main Chemistry · Coordination Compounds · Set 2 (Q31-60)
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31. $The oxidation states of Cr in [Cr (H_{2} O)_{6}] C l_{3}, [Cr (C_{6} H_{6})_{2}], and K_{2} [Cr (C N)_{2} (O)_{2} (O_{2})(N H_{3})] respectively are :$ (1) $+3, 0, and +6$ (2) $+3, 0, and +4$ (3) $+3, +4, and +6$ (4) $+3, +2, and +4$ 32. $Complex X of composition of Cr (H_{2} O)_{6} C l_{n} has a spin only magnetic moment of 3.83 BM . It reacts with AgN O_{3} and shows geometrical isomerism. The IUPAC nomenclature of X is:$ (1) $Hexaaquachromium (III) chloride$ (2) $Tetraaquadichloridochromium (III) chloride dihydrate$ (3) $Dichloridotetraaqa chromium (IV) chloride dehydrate$ (4) $Tetraaquadichloridochromium (IV) chloride dehydrate$ 33. $Aluminium chloride in acidified aqueous solution forms an ion having geometry$ (1) $Octahedral$ (2) $Square Planar$ (3) $Tetrahedral$ (4) $Trigonal bipyramidal$ 34. $IUPAC name of Na_{3} (Co (NO_{2})_{6}) is$ (1) $sodium hexanitritocobaltate(II)$ (2) $sodium hexanitrocobalt(III)$ (3) $sodium hexanitritocobaltate(III)$ (4) $sodium cobaltnitrite.$ 35. $The one that can exhibit highest paramagnetic behaviour among the following is gly = glycinato; bpy = 2, 2^{’} -bipyridine$ (1) $[Fe (en) (bpy) (NH_{3})_{2}]^{2 +}$ (2) $[Pd (g / y)_{2}]$ (3) $[Co (OX)_{2} (OH)_{2}]^{-} (Δ_{0} > P)$ (4) $[Ti (NH_{3})_{6}]^{3 +}$ 36. $Low oxidation state of metals in their complexes are common when ligands:$ (1) $have good π -accepting character$ (2) $have good σ -donor character$ (3) $are havind good π -donating ability$ (4) $are havind poor σ -donating ability$ 37. $Which of the following complex is homoleptic?$ (1) $(Ni (CN)_{4})^{2 -}$ (2) $(Ni (NH_{3})_{2} Cl_{2})$ (3) $(Fe (NH_{3})_{4} Cl_{2})^{+}$ (4) $(Co (NH_{3})_{4} Cl_{2})^{+}$ 38. $Among the following complexes the one which shows Zero crystal field stabilizations energy (CFSE)$ (1) $[Nn(H2O)6]3+$ (2) $[Fe(H2O)6]3+$ (3) $[Co(H2O)6]2+$ (4) $[Co(H2O)6]3+$ 39. $The coordination number and the oxidation state of the element 'E' in the complex [E (e n)_{2} (C_{2} O_{4})] N O_{2} (when 'en' is ethylene diamine) are, respectively,$ (1) $4 and 2$ (2) $4 and 3$ (3) $6 and 3$ (4) $6 and 2$ 40. $The IUPAC name of the complex: (Ag (H_{2} O)_{2}) (Ag (CN)_{2}) is$ (1) $Diaquasilver(I) dicyanidoargentate(I)$ (2) $Dicyanidosilver(II) diaquaargentate(II)$ (3) $Diaquasilver(II) dicyanidoargentate(II)$ (4) $Dicyanidosilver(I) diaquaargentate(I)$ 41. $Among the following species the one which causes the highest CFSE, Δ_{0} as a ligand is :$ (1) $C N^{-}$ (2) $N H_{3}$ (3) $F^{-}$ (4) $CO$ 42. $Indicate the complex/complex ion which did not show any geometrical isomerism$ (1) $[C o C l_{2} (e n)_{2}]$ (2) $[Co(CN)_{5} (NC)]^{3 -}$ (3) $[Co (N H_{3})_{3} (N O_{2})_{3}]$ (4) $[C o (N H_{3})_{4} C l_{2}]^{+}$ 43. $The correct sequence of ligands in the order of decreasing field strength is :$ (1) $NCS^{-} > EDTA^{4 -} > CN^{-} > CO$ (2) $CO > H_{2} O > F^{-} > S^{2 -}$ (3) $S^{2 -} > - OH > EDTA^{4 -} > CO$ (4) $^{-} OH > F^{-} > NH_{3} > CN^{-}$ 44. $The number of unpaired electrons responsible for the paramagnetic nature of the following complex species are respectively: (Fe (CN)_{6})^{3 -}, (FeF_{6})^{3 -}, (CoF_{6})^{3 -}, (Mn (CN)_{6})^{3 -}$ (1) $1, 5, 4, 2$ (2) $1, 4, 4, 2$ (3) $1, 5, 5, 2$ (4) $1, 1, 4, 2$ 45. $The pair in which both the species have same magnetic moment (spin only) is$ (1) $(CoCl_{4})^{2 -}, (Fe (H_{2} O)_{6})^{2 -}$ (2) $(Mn (H_{2} O)_{6})^{2 +}, (Cr (H_{2} O)_{6})^{2 +}$ (3) $(Cr (H_{2} O)_{6})^{2 +}, (Fe (H_{2} O)_{6})^{2 +}$ (4) $(Cr (H_{2} O)_{6})^{2 +}, (CoCl_{4})^{2 -}$ 46. $The hybridization of metals involved in the following complexes, respectively are (Mn (CN)_{6})^{3 -}, (CoF_{6})^{3 -}$ (1) $sp^{3} d^{2}, sp^{3} d^{2}$ (2) $sp^{3} d^{2}, d^{2} sp^{3}$ (3) $d^{2} sp^{3}, d^{2} sp^{3}$ (4) $d^{2} sp^{3}, sp^{3} d^{2}$ 47. $The complex that shows Facial - Meridional isomerism is:$ (1) $_{1.} (Co (en)_{2} Cl_{2})^{+}$ (2) $(Co (en)_{3})^{3 +}$ (3) $(Co (NH_{3})_{3} Cl_{3})$ (4) $(Co (NH_{3})_{4} Cl_{2})^{+}$ 48. $Which among the following is a neutral complex?$ (1) $(Fe (H_{2} O)_{6}) Cl_{3}$ (2) $(Ni (NH_{3})_{6}) Cl_{2}$ (3) $(Pt (NH_{3})_{2} Cl_{2})$ (4) $K (Ag (CN)_{2})$ 49. $Among the following metal carbonyls, the C-O bond order is lowest in :$ (1) $[Mn(CO)_{6}]^{+}$ (2) $[V (C O)_{6}]¯$ (3) $[Cr (C O)_{6})]$ (4) $[Fe (C O)_{5}]$ 50. $The correct order of the calculated spin-only magnetic moments of complexes (A) to (D) is(A) Ni (CO)_{4} (B) [Ni (H_{2} O)_{6}] C l_{2} (C) N a_{2} [Ni (CN)_{4}] (D) PdC l_{2} (PP h_{3})_{2}$ (1) $A = C = D < B$ (2) $A < B < C < D$ (3) $A > B > C > D$ (4) $A = B > C > D$ 51. $Which of the following complexes formed by nickel is tetrahedral and paramagnetic?$ (1) $(Ni (CN)_{4})^{2 -}$ (2) $(Ni (CO)_{4})$ (3) $(Ni (Cl)_{4})^{2 -}$ (4) $(Ni (NH_{3})_{6})^{2 +}$ 52. $The correct order of field strength of the following ligands is$ (1) $N^{3 -} > C_{2} O_{4}^{2 -} > NH_{3} > CO$ (2) $N^{3 -} > NH_{3} > C_{2} O_{4}^{2 -} > CO$ (3) $CO > NH_{3} > C_{2} O_{4}^{2 -} > N^{3 -}$ (4) $CO > N^{3 -} > NH_{3} > C_{2} O_{4}^{2 -}$ 53. $The IUPAC name of the compound (NH_{4})_{2} (Ni (C_{2} O_{4})_{2} (H_{2} O)_{2}) is$ (1) $Nickel (II) diammino dioxalato diaquate$ (2) $Dioxalatodiammino diaquo nickelate (III)$ (3) $Ammonium diaquabis (oxalato) nickelate (II)$ (4) $Ni dioxalato diaqua (II) amminate$ 54. $From the magnetic behaviour of (NiCl_{4})^{2 -} (paramagnetic) and (Ni (CO)_{4}) (diamagnetic), choose the correct geometry and oxidation state.$ (1) $(NiCl_{4})^{2 -} : Ni^{II}, tetrahedral (Ni (CO)_{4}) : Ni^{II}, square planar$ (2) $(NiCl_{4})^{2 -} : Ni^{II}, square planar (Ni (CO)_{4}) : Ni (0), square planar$ (3) $(NiCl_{4})^{2 -} : Ni^{II}, tetrahedral (Ni (CO)_{4}) : Ni (0), tetrahedral$ (4) $(NiCl_{4})^{2 -} : Ni (0), tetrahedral (Ni (CO)_{4}) : Ni (0), square planar$ 55. $Co-ordination compounds have great importance in biological systems. In this context, which statement is incorrect ?$ (1) $Carboxypeptidase-A is an enzyme and contains zinc.$ (2) $Haemoglobin is the red pigment of blood and contains iron.$ (3) $Cyanocobalmin is B_{12} and contains cobalt.$ (4) $Chlorophylls are green pigments in plants and contain calcium.$ 56. $Which one of the following complex has the highest magnitude of crystal ficld splitting energy (Δ_{0}) ?$ (1) $(Co (H_{2} O)_{6})^{3 +}$ (2) $(Co (NH_{3})_{6})^{3 +}$ (3) $(Co (C_{2} O_{4})_{3})^{3 -}$ (4) $(CoF_{6})^{3 -}$ 57. $The conditions and consequence that favours the t_{2 gg} e_{g}^{1} configuration in a metal complex are$ (1) $weak field ligand, low spin complex$ (2) $weak field ligand, high spin complex$ (3) $strong field ligand, high spin complex$ (4) $strong field ligand, low spin complex$ 58. $The total number of isomers for a square planar complex (M (F) (Cl) (SCN) (NO_{2})) is$ (1) $16$ (2) $8$ (3) $4$ (4) $12$ 59. $X is the number of geometrical isomers exhibited by (Pt (NH_{3}) (H_{2} O) BrCl) . Y is the number of optically inactive isomer(s) exhibited by (CrCl_{2} (ox)_{2})^{3 -} Z is the number of geometrical isomers exhibited by (Co (NH_{3})_{3} (NO_{2})_{3}) . The value of X + Y + Z is .$ 60. $The oxidation states of iron atoms in compounds (A), (B) and (C) respectively, are x, y and z . The sum of x, y and z is Na_{4} [Fe (CN)_{5} (NOS)] Na_{4} [FeO_{4}] [Fe_{2} (CO)_{9}]$