Tiêu đề 09. COORDINATION COMPOUNDS.pdf ✅

1 JEE Advanced (2024) Coordination Compounds CHEMISTRY Only One Option Correct Type Question (1-7) 1. The calculated spin only magnetic moments of [Cr(NH3)6] 3+and [CuF6] 3– in BM, respectively, are (Atomic numbers of Cr and Cu are 24 and 29, respectively) [Magnetic Movement] (A) 3.87 and 2.84 (B) 4.90 and 1.73 (C) 3.87 and 1.73 (D) 4.90 and 2.84 2. Among [Ni(CO)4], [NiCl4] 2– , [Co(NH3)4Cl2]Cl, Na3[CoF6], Na2O2 and CsO2, the total number of paramagnetic compounds is [CFT] (A) 2 (B) 3 (C) 4 (D) 5 3. The complex [Fe(H2O)5 NO]2+ is formed in the brown ring test nitrates when freshly prepared FeSO4 solution is added to aqueous solution of NO3 – followed by addition of conc. H2SO4 Select correct statement about this complex [CFT] (A) Colour change is due to charge transfer (B) It has iron in +1 oxidate state and nitrosyl as NO+ (C) It has magnetic moment of 3.87BM confirming three unpaired electrons in Fe (D) All the above are correct statements 4. Which of the following is tetrahedral paramagnetic complex? [VBT] (A) K2[PtCl4] (B) K2[MnCl4] (C) K2[ZnCl4] (D) K2[HgI4] 5. Arrange the following cyano complexes in increasing order of magnetic moment. [CFT] (A) [Fe(CN)6] 4– < [Fe(CN)6] 3– < [Mn(CN)6] 3–< [Cr(CN)6] 3– (B) [Fe(CN)6] 3– < [Cr(CN)6] 3– < [Mn(CN)6] 3–< [Fe(CN)6] 4– (C) [Mn(CN)6] 3– < [Fe(CN)6] 3– < [Fe(CN)6] 4–< [Cr(CN)6] 3– (D) [Fe(CN)6] 3– < [Cr(CN)6] 3– < [Fe(CN)6] 4– < [Mn(CN)6] 3– 6. Which of the following is correctly matched? Column-I Column-II Column-III (a) [Cr(CO)6] Paramagnetic Octahedral, dsp3d 2 (b) [Fe(CO)5] Paramagnetic Trigonal bipyramidal, sp3d (c) [Co(CO)4] Paramagnetic Square planar, dsp2 (d) [Ni(CO)4] Diamagnetic Square planar, dsp2 [VBT] 7. Choose incorrect stability order: [CFT] (A) [Cu(NH3)4] 2+ < [Cu(en)2] 2+ < [Cu(trien)]2+ (B) [Fe(H2O)6] 3+ < [Fe(NO2)6] 3– < [Fe(NH3)]3+ (C) [Co(H2O)6] 3+ < [Rh(H2O)6] 3+ < [Ir(H3O)]3+ (D) [Cr(NH3)6] 1+ < [Cr(NH3)6] 2+ < [Cr(NH3)]3+ One or more than one correct option(8-12) 8. Which of the following statement(s) can be applied 7icses salt? [CFT] (A) Its aqueous solution gives test for Cl– ions. (B) Its IUPAC name is potassium trichloro ( 2 ) ethylene) platinate (II). (C) Its formula is K[Pt(C2H4)Cl3]. (D) It contains one π-acid ligand. 9. A complex has the empirical formula CoCl3⋅6H2 O. Which of the following statement(s) is/are correct? [Isomerism] (A) It can exhibit hydrate as well as coordination isomerism (B) All the hydrate isomers are electrical conductor in aqueous solution (C) One of the hydrate isomer can exhibit geometrical isomerism (D) The hydrate isomers which can exist in fac- mer isomeric form have the λmax for d-d transition. 10. Select optically active complex (es): [Isomerism] (A) (B) Practice Sheet
2 (C) (D) All the statements are incorrect. 11. Consider the following two possible geometry of a complex around central metal M and select correct statement(s) about complex. [Isomerism] (A) In both possible structure complex is optically active (B) In both possible structure complex show geometrical isomerism (C) Only in I structure optical activity is observed (D) Only in II structure geometrical isomer is possible 12. Type of d-orbitals which are used in hybridization by central metal in [Fe(H2O)6]SO4: [CFT] (A) dxy (B) 2 2 x y d − (C) 2 z d (D) dxz Numerical type questions (13-17) 13. What is the denticity of N(CH2CH2NH2)3? [Denticity] 14. Empirical formula of a complex is H12O6Cl3 Cr, when it reacts with concentrated H2SO4, it loses its 13.5% of its original mass then find out the number of water molecules in coordination sphere of that complex (atomic weight of Cr = 52, H = 1, Cl = 35.5, O = 16) [Werner Theory] 15. Give the total number of possible structural isomers of the compound ( ) II II 3 4 4 Cu NH Ptl .             [Isomerism] 16. For the complex compound [Pt(NH3)(NO2) py(ONO)], total number of geometrical isomers will be: [Isomerism] 17. Find out total number of paramagnetic complexes which are inner orbital complexes: [Cr(NH3)6]Cl3, [Co(NH3)6] (NO3)2, [Ni(NH3)6] SO4, K2[PtCl6 ], [V(H2O)6](SO4), [Mn(NH3)6] (SO4), [Fe(H2O)5 (NO)]SO4, K3[CuCl4], Na4 [Fe(CN)5(NOS)] [CFT] .
3 ANSWER KEY 1. (A) 2. (B) 3. (D) 4. (B) 5. (A) 6. (B) 7. (B) 8. (B, C ) 9 . ( A ) 10 . (B, D) 11 . (B, C) 1 2 . (B, C) 1 3 . (4) 1 4 . (2) 1 5 . (4) 1 6 . (3) 1 7 . (3)