Coordination Compounds PYQs Set 3 (PDF)

Set 3 of 20 · Questions 61-90 of 596

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Mere Teacher · Previous Year Questions JEE Main Chemistry · Coordination Compounds · Set 3 (Q61-90)
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61. $The Δ_{0} of a coordination complex of a metal ion (3 d^{1}) is 1000 kJ mol^{- 1} . If the energy of t_{2 g} orbitals is - 400 kJ mol^{- 1}, the energy (in kJ mol^{- 1}) of e_{g} orbitals is$ (1) $-600$ (2) $600$ (3) $1000$ (4) $400$ 62. $Which of the following is the correct order of increasing field strength of ligands to form coordination compounds?$ (1) $SCN^{-} < F^{-} < CN^{-} < C_{2} O_{4}^{2 -}$ (2) $F^{-} < SCN^{-} < C_{2} O_{4}^{2 -} < CN^{-}$ (3) $CN^{-} < C_{2} O_{4}^{2 -} < SCN^{-} < F^{-}$ (4) $SCN^{-} < F^{-} < C_{2} O_{4}^{2 -} < CN^{-}$ 63. $Which of the following complexes exhibits the highest paramagnetic behaviour? where, gly = glycine, en = ethylenediamine and bpy = bipyridyne ) (At no Ti = 22, V = 23, Fe = 26, Co = 27)$ (1) $[V(gly)2(OH)2(NH3)2]+$ (2) $[Fe(en)(bpy)(NH3)2]2+$ (3) $[Co(OX)2(OH)2]-$ (4) $[Ti(NH3)6]3+$ 64. $When AgNO3 is added to a solution of Co(NH3)5Cl3, the precipitate of AgCl shows two ionizable chloride ions. This means :$ (1) $Two chlorine atoms satisfy primary valency and one secondary valency$ (2) $One chlorine atom satisfies primary as well as secondary valency$ (3) $Three chlorine atoms satisfy secondary valency$ (4) $Three chlorine atoms satisfy primary valency$ 65. $Which of following coordinate complexes is an exception to EAN rule? (Given At. No. Pt = 78, Fe = 26, Zn = 30, Cu = 29)$ (1) $(Pt (NH_{3})_{6})^{4 +}$ (2) $(Zn (NH_{3})_{4})^{2 +}$ (3) $(Fe (CN)_{6})^{4 -}$ (4) $(Cu (NH_{3})_{4})^{2 +}$ 66. $The existance of two different coloured complexes with the composition of [Co(NH3)4Cl2]+ is due to$ (1) $linkage isomerism$ (2) $geometrical isomerism$ (3) $coordination isomerism$ (4) $ionization isomerism$ 67. $Which complex among the following has the highest value of spin only magnetic moment? (Fe (CN)_{6})^{3 -}, (Fe (CN)_{6})^{4 -}, (Ni (CN)_{4})^{2 -}, (NiCl_{4})^{2 -}$ (1) $(Fe (CN)_{6})^{3 -}$ (2) $(Fe (CN)_{6})^{4 -}$ (3) $(Ni (CN)_{4})^{2 -}$ (4) $(NiCl_{4})^{2 -}$ 68. $Consider the following complex ions, P, Q and R. P = [F e F_{6}]^{3-}, Q = [V(H_{2} O)_{6}]^{2 +} and R = [Fe(H_{2} O)_{6}]^{2 +} . The correct order of the complex ions, according to their spin-only magnetic moment values (in B.M.) is$ (1) $R < Q < P$ (2) $Q < R < P$ (3) $R < P < Q$ (4) $Q < P < R$ 69. $Which one of the following is an outer orbital complex and exhibits paramagnetic behaviour?.$ (1) $[N i (N H_{3})_{6}]^{2 +}$ (2) $[Z n (N H_{3})_{6}]^{2 +}$ (3) $[C r (N H_{3})_{6}]^{3 +}$ (4) $[C o (N H_{3})_{6}]^{3 +}$ 70. $The coordination number of The in K_{4} (Th (C_{2} O_{4})_{4} (H_{2} O)_{2}) is: (C_{2} O_{4}^{2 -} = oxalato)$ (1) $14$ (2) $6$ (3) $8$ (4) $10$ 71. $Which one of the following statement is correct for d^{4} ions [P = pairing energy]$ (1) $When Δ_{0} > P, low-spin complex form$ (2) $When Δ_{0} < P, low-spin complex form$ (3) $When Δ_{0} > P, high-spin complex form$ (4) $When Δ_{0} < P, both high-spin and low-spin complexes form$ 72. $The following complexes (CoCl (NH_{3})_{5})^{2 +}, (Co (CN)_{6})^{3 -}, (Co (NH_{3})_{5} (H_{2} O))^{3 +}, (Cu (H_{2} O)_{4})^{2 +} (A) (B) (C) (D) The correct order of A, B, C and D in terms of wavenumber of light absorbed is :$ (1) $C < D < A < B$ (2) $B < C < A < D$ (3) $A < C < B < D$ (4) $D < A < C < B$ 73. $Match List I with List II List I (Complex) A. Ni(CO)_{4} B. [Ni(CN)_{4}]^{2 -} C. [Co(CN)_{6}]^{3 -} D [C o F_{6}]^{3 -} List II (Hybndization) I. s p^{3} II s p^{3} d^{2} III. d^{2} s p^{3} IV. d s p^{2} Choose the correct answer from the options given below:$ (1) $A-IV,B-I,C-III,D-II$ (2) $A-I B-IV,C-III,D-II$ (3) $A-LB-IV,C-II,D-III$ (4) $A-IV, B-I, C-II. D-III$ 74. $Octahedral complexes of copper (II) undergo structural distortion (Jahn-Teller). Which one of the given copper (II) complexes will show the maximum structural distortion ? (en-ethylenediamine; H_{2} N- C H_{2} - C H_{2} - N H_{2})$ (1) $[Cu (H_{2} 0)_{6}] S O_{4}$ (2) $[Cu(en) (H_{2} O)_{4}] S O_{4}$ (3) $cis-[Cu(en)_{2} C l_{2}]$ (4) $trans-[Cu(en)_{2} C l_{2}]$ 75. $Number of complex(es) which will exist in cis-trans is/are$ (1) $C o C l_{3} . 4 N H_{3}$ (2) $C o C l_{3} . 5 N H_{3}$ (3) $C o C l_{3} . 6 N H_{3} and$ (4) $CoCl (N O_{3})_{2} . 5 N H_{3}$ 76. $Cobalt (III) chloride forms several octahedral complexes with ammonia. Which of the following will not give test for chloride ions with silver nitrate at 25°C ?$ (1) $CoCl3\cdot4NH3$ (2) $CoCl3\cdot5NH3$ (3) $CoCl3\cdot6NH3$ (4) $CoCl3\cdot3NH3$ 77. $The d- electronic configuration of an octahedral Co (II) complex having magnetic moment of 3.95 BM is:$ (1) $t_{2}_{g}^{3} e_{g}^{0}$ (2) $t_{2}_{g}^{6} e_{g}^{1}$ (3) $t_{2 g}^{5} e_{g}^{2}$ (4) $e^{4} t_{2}^{3}$ 78. $Given below are two statements: one is labelled as "Assertion A" and the other is labelled as "Reason R" Assertion A : In the complex Ni (C O)_{4} and Fe (C O)_{5}, the metals have zero oxidation state. Reason R: Low oxidation states are found when a complex has ligands capable of π -donor character in addition to the σ -bonding. choose the most appropriate answer from the options given below$ (1) $A is correct but R is not correct$ (2) $A is not correct but R is correct$ (3) $Both A and R are correct but R is NOT the correct explanation of A$ (4) $Both A and R are correct and R is the correct explanation of A$ 79. $Identify the correct set of (Co (NH_{3})_{6})^{3 +} ion. (hybridisation of Co^{3 +}, type of complex, number of unpaired electrons in the complex ion respectively)$ (1) $d^{2} sp^{3}, inner orbital complex, zero$ (2) $sp^{3} d^{2}, outer orbital complex, three$ (3) $d^{2} sp^{3}, inner orbital complex, two$ (4) $sp^{3} d^{2}, outer orbital complex, zero$ 80. $The correct order of the calculated spin-only magnetic moments of complexes (A) to (D) is : (A) Ni (C O)_{4} (B) [Ni (H_{2} O)_{6}] C l_{2} (C) N a_{2} [Ni (C N)_{4}] (D) P d C l_{2} (P P h_{3})_{2}$ (1) $(A) \approx (C) < (B) \approx (D)$ (2) $(A) \approx (C) \approx (D) < (B)$ (3) $(C) \approx (D) < (B) < (A)$ (4) $(C) < (D) < (B) < (A)$ 81. $Which of the following complexes will exhibit maximum attraction to an applied magnetic field?$ (1) $[N i (H_{2} O)_{6}]^{2 +}$ (2) $[Co(en)_{3}]^{3 +}$ (3) $[Zn(H_{2} O)_{6}]^{2 +}$ (4) $[Co(H_{2} O)_{6}]^{2 +}$ 82. $The correct statements among I to III are: (I) Valence bond theory cannot explain the color exhibited by transition metal complexes. (II) Valence bond theory can predict quantitatively the magnetic properties of transition metal complexes. (III) Valence bond theory cannot distinguish ligands as week and strong field ones.$ (1) $(II) and (III) only$ (2) $(I), (II) and (III)$ (3) $(I) and (III) only$ (4) $(I) and (II) only$ 83. $Which sets of the d -orbitals are directly oriented towards the ligands in octahedral coordination compounds?$ (1) $d_{x^{2} - y^{2}} and d_{xy}$ (2) $d_{z^{2}} and d_{yz}$ (3) $d_{xz} and d_{xy}$ (4) $d_{x^{2} - y^{2}} and d_{z^{2}}$ 84. $If the crystal field splitting energy of a tetrahedral complex (Δ_{t}) of the type (M L_{4})^{n +} is x eV, what is the crystal field splitting energy with respect to an octahedral complex, (M L_{6})^{n +} ?$ (1) $\frac{9 x}{4} eV$ (2) $\frac{9 x}{8} eV$ (3) $\frac{4 x}{9} eV$ (4) $\frac{4 x}{5} eV$ 85. $Match the following List-I (Complex) (A) [Co F_{6}]^{3 -} (B) [Co (C_{2} O_{4})_{3}]^{3 -} (C) [Fe F_{6}]^{3 -} (D) [Mn (CN)_{6}]^{3 -} List-II (Spin only Magnetic moment) (I) 0 (II) 24 (III) 8 (IV) 35 (V) 15 The correct answer is:$ (1) $A-V, B-II, C-IV, D-I$ (2) $A-II, B-I, C-IV, D-III$ (3) $A-II, B-I, C-V, D-III$ (4) $A-III, B-II, C-I, D-V$ 86. $The correct order of the number of unpaired electrons in the given complexes is (A)[Fe(CN)_{6}]^{3 -} (B) [F e F_{6}]^{3 -} (C) [C o F_{6}]^{3 -} (D) [Cr( oxalate )_{3}]^{3 -} (E) [Ni(CO)_{4}] Choose the correct answer from the options given below:$ (1) $E<A<D<C<B$ (2) $E<A<B<D<C$ (3) $A < E, C < B < D$ (4) $A<E<D<C<B$ 87. $In Fe (C O)_{5}, the Fe - C bond possesses :$ (1) $π-character only$ (2) $both σ and π characters$ (3) $ionic character only$ (4) $σ-character only$ 88. $Number of ambidentate ligands among the following is______NO_{2}^{-}, SCN^{-}, C_{2} O_{4}^{2 -}, NH_{3}, CN^{-}, SO_{4}^{2 -}, H_{2} O .$ 89. $The number of optical isomers exhibited by the iron complex (A) obtained from the following reaction is . FeCl_{3} + KOH + H_{2} C_{2} O_{4} \to A$ 90. $The sum of oxidation state of the metals in Fe (C O)_{5}, V O^{2 +} and W O_{3} is$