Page 1 : Dinesh Objective Chemistn., , 240, QUESTIONS, , NOREVISION, he, , polarisability, , deureasin, , onler of, , coee, , The, , FROM COMPETITIVE EY (Phy, , TITIVE EXAMS, , of, , 10, Other factors being constant, which, expected to correspond to, , nich bond, , shortest be, , s iN, , R ) . 1 , Br.CT, A)CTRI, C I r . I (D),Br,CI,F, (RSE199/), , hydrogen, , Inter molecular forces in solid, A, , are, , (B), , 11. Which bond is, , Waal forces, , der, , an, , or, , CHydrogen bonds, , dispersion, , (Ph, , All of these., , C.E.T. 1991), , 12. The hybrid states of carbon in, diamand, and acetylene are respectively, , (A) sp, sp, sp3, , lone pair., with it ?, , no, , (C) sp3, sp?, sp, , (D) dsp?.(Ph., , The octahedral, , shape is, , (B) SF, , C) TeFo, , (D) CIP., , solid is, , a, , C.E. T: 1991), , poor conductor of, , 1992), , electricity, , because, , A) lons donot conduct electricity, (B), , Charge, , the ions is, , on, , lons occupy fixed, , distributed, , uniformly, , positions in, , it., , 6., , Which of the following, axis of symmetry ?, , C) CO2, Which overlap is, (A) S-S overlap, , involved in HCI molecule ?, , (B) p-p overlap, (D) S-p overlap., , C)s-d overlap, 8., , In, set, , molecules has three fold, , (B) C2H4, (D) SO2. (A.1.1.M.S. 1993), , (A) NH3, , of orbitals, , are, , C) 2px and, , of the following, , degenerate ?, , (B), , (A) O2 and ds, , 2p, , 2px, , 9., , (A) 90, (C) 109, , Answers, 1. (D), , 11. (C), , free electrons, , D), , chemicalinertness of metals. (C.B.S.E, , 15. Which one of these is weakest ?, (A) ionic bond, (C) metallic bond, , and, , 0py, , (D) 2p and o 2pX, , PH3 is close to, (B) 105°, (D) 120°(C.P.M. T. 1989), , (B) covalent bond, (D) van der Wal's for., (4.F.MC., , 16. Which of the following is non-existant, , (B) O2, (D) O. (4.F.M.C, , (C) He2, , 17. Which of the following compound has, (B) CHCl3, , (D) NH3., , (C) HF, , (Ph. CE.T, , 18. Which of the, electricity ?, , (A) Molten, , not, following does, , NaOH, , (B), , 12., , (B), (C), , 3. (D), , 4 . (C), , 13. (D), , 14. (C), , 5. (C), 15. (D), , Molten KOH, , (Ph. C.E.T. 19., , (C) Solid NaCl, , 6. (A), , 7, , (D), , 16. (C), , 17., , (A), , c, , (D) Aqueous NaCl., , 9., , 2., , accorc, , to molecular orbital theory?, , (A) CCl4, , (4.1LM.S. 1989), , The bond angle in, , (C) reflection of light due to the presence, , (A) H2, , (Karnataka C.E. T. 199/), , homonuclear molecule which, , a, , (4.F.MC, , 14. The lustre of the metal is on account of, (A) high density of metals, (B) high polish of metals, , solids, , C), around, (D) lons have uniform field of influence, (C.P.M.T 1986), , AF.MC, , (B) Trigonal bipyram, (D) Square planar., , (A) Sphere, (C) Tetrahedral, , (4.F.M. C., , (B) sp. sp. sp, (D) sp, sp,, 1994, Karnataka sp, CEE, , 13. XeF4 has a shape of, , associated with, , A) PFs, ionic, , (C.E.T., , (B) sp'a?, , A)pa, C) dsp, , (D)0.5.Ph. EI, , polar ?, , (B) Br-F, (D) F-F. (RS, , (C) 1-P, , with, A molecule is square planar, associated, Whar ype of hybridisation is, , An, , most, , (A) CI-F, , forves, , D), , (C) 2, , Covalent fones, , London, , len, , (A) 2,, , 8. (B), 18. (C), , (A), , 10.

Page 2 : a c a iB o, , of, , B, , 7, , ,, , (B)CHP, , Whech, , A, , polar, , in, the following, , (D)CH /'%, , F, , Which of the following molecule/ions, , riangular pyramidal shape, , 11001, , (A BF, , planar molecular becaUne in thi, , h, , () NO, , Cule boron is, , (B) sp hybridised, (D) unhybridised, , Aphybridised, hvbridined, , Op, , 994), ofthe following phenomena will occur, , 4, , h, , e, , c, , the elements having Name, , h, , hen two, , for bonding ?, of electron approach, will not occur, A), , Orbital, , over, , ,The nature of interparticle forces in henzene is, (A) Dipole dipole interactim, (8) Dispersion force, (C) lon dipole interaction, (D) H bonding, ,The angles between covalent bends is maximum, in, , will not occur, , BBonding, , Boxh (A), , and, , None of the, , (A) CH, (C) PP, , (B) are correct, , above are, , correct., , (4.FMC 1994), , whch of the following, , is, , electron, , deficient ?, , (B) PCl, , ABCl, CPCly, , (D) NH., , A) H, , (B) Na, , C) Fe, , (D) Oxygen., , Whch ofthe following molecules is linear?, , (B) CH4, , A) CH2, , (D)NH3. C.E.T. 1994), Which of the following is not paramagnetic ?, (B) S-2, (A) NO, C) H,0, , (D)N.(4.11.M.S. 1997), NH and BP3 form adduct readily because they, , C0, , form, (A) ionic bond, , 3, One of the following is having square planar, structure, , (A) NH, (C) XeF, , (B) covalent bond, hydrogen bond., (M.L. N.R. 1994), , Amolecule in which sp hybrid orbitals are, by the central atom in forming covalent bonds is, (A) Hea, , used, , (B) SO, , (D) N2, , (C.B.S.E. 1994), , Ihemolecular species having highest bond order, , A)O, C)o, , (B) 0, (D) 0 . (C.B.S.E. 199), , TheoSFmolecule is, trigonal bipyramidal. The, utbitals used, A), Cs, , by As for, , d,2.5,Px.Py, , PPy, , (B) BF, (D) CCL, , (NCERT 1980, MP(EI 1, 34, The carbon-carbon link in acetylene contains, (A) One sigma and two pi bonds, (B) Two sigma and three pi bonds, and two pi bonds, C), Two, sigma, (D) Three sigma bonds., , (Manipal Med Fnt /99, 35, Paramagnetism is exhibited by molecules which, (A) are not attracted by magnetic field, , (8) contain only paired electrons, , (C) contain unpaired electrons, , (D) carry positive charge., , C) co-ordinate bond (D), , C) PCl, , (D) NH, (MPCEI 14, , ALIM.S. 1982, A.F M.C 1994), Which of the following has unchanged valency ?, (A.F.M.C. 1994), , (B) BP, , hybridisation are, , P (B) d,2_2., P:, d (D) None., , 5,, , P, , Py, , P2, , Swers, , (Manipal Med Et /99, 36. The bond angle around the atom which uses, sp, hybrid orbitals is, , (A) 120, (C) 105, , (B) 180, , (D) 109° 28., BH. u 199, 37. In the resonating structure of benzene, the number, of o and n bonds are, (A) 3 rand 12 a, (B) 3 oand 12r, (C) 6 r and 6o, (D) 12 rand 12 o., 38. The, , high density, , due to, , (8.H.Ent 1093), of water, , compared, , to, , ice is, , (A) dipole-dipole interactions, (B) hydrogen bonding interaction, (C) dipole induced dipole interaction, (D) none of the above., (CBSL. 1907), , 9., , A), , 20. (B) 21., 30. (C) 31. (C), (B), , 22. (A), 32. (B), , 23. (B), 33. (C), , 24. (A), 34. (A), , 25. (B), 35. (C), , 26. (C), h A), , 27. (B), , 28. (C)

Page 3 : 242, , Dinesh Objective Chemistry, BCh does, , (A), , 9. Which of the following has covalentas well as, , (A) NaC1, , (B) NaOH, , C),0, , (D) HClg), , (B) B-CI bond, , pair, , (A) Nine o and nine n, (B) Five n and nine os, (C) Nine o and seven n, (D) Eight o and eight ., , (A), , In, , are, , bhu ne, , (C.BSE, , converted to mono, mono catm, , respectively. Which is wr., , andd 0, , N,, , the N, , -, , ?, , N, , Nbond weaken, , 0. he 0-O bond order, increases, (C) In O. paramagnetism decreases, , (M.P.PM.7. 1995), Carbon dioxide is isostructural with which of, , (B) In, , the following ?, E0., , (M.P.P.M.T. 1995), , (D) N becomes diamagnetic., Which of the following pair(C.B.S, conm, , Containe, , structural species ?, , 42. The molecule of which ofthe following substance, , CH, C) So, (A), , has (u> 0), (A) Water, , N and O, , 49., , (B) H,O, (D) NO., , B, , Covalent han b, , tetra cyano ethylene ?, , A) HgCl, , on, , is more, , How many sigma and pi bonds are present im, , C) SnCl, , (Ph, , polar, (C) N atom is smaller than Bthan N, (D)N-Cl bond is more covalent, bond., , (MPPMT 1995), , 41., , lone, Jone pair, , has, , ionic valeney ?, , 40,, , not have, , (B) Methane, , (C) Carbon dioxide (D) Nitrogen., , and, , CH, , (6) NH and NH,, and BF (D), NH and BeF,, , B.H.U, (M.P.P.M.T. 1995) 51. What is the correctsequence of bond, orderI, , 43. Given electronic configuration of four elements, as (), 1s (1) 1s3 252 2p, () 1s 2 2p and, , (IV) 1s 2s 2p°. The ore which is capable of, forming ionic as well as covalent bonds is, (B) II, (A)I, C) II, (D) IV. (M.L.N.R. 1995), 44. The ion which is isoelectronic with CO is, , (A) CN, C) N, , (A), , O»0, , 02, , >, , (B) Trigonal bipyramida, (D) Square planar., (Pb. C.E.T. I1, , (A) Trigonal, C) Octahedral, , (C.B.S.E. 1997), , In piperidine, , NH, the hybrid state assumei, , by N is, , (2 (G*2 (Tap (2p, , (A) sp, , (B) sp, , (C)sp3, , (D) dsp., , The bond order is, , (Har. C.E.E.T. 190, , (B) 2, , (D) 1., (C.B.S.E. 1995), 46. The order of 0-0 bond length in O2, H2 O, O3, , 54. The calculated bond order in H, ion is, , (A) 02 > O, > H0%, , C), , (C) H02 > 0, > 02, (D) O2 > H202 > Og., (C.B.S.E. 1995), Which of the following species is para-, , (A) CO, , (B) NO, , (C)05, , (D) CN., , The electronic configuration of metal M is Is, , 2s 2p, , (C.B.S.E. 1995)56., , 48. BCl molecule is planar while NCly is pyramidal, because, , (D) 1., , (Har. C.E.E. T. 190, 55., , magnetic?, , 3s. The formula of its oxide will e, , (A) MO, , (B) M,0, , C) M,03, , (D) MO2, , (M.P.P.M.T 1908, , Directed bond in, , water form an angle or, , (A) 90°, , (B) 120, , (D)60°.(M.P.P.M.T. 190, , C) 105, , Answers 40., , 39. (B), 49. (D), , (B), , (A) 0, , (B)Oy>H,02 > O2, 47., , (A) 41. (A), 50. (C) 51. (C), , (B.H.U. 19, , 52. The structure of ICl, is, , 45. The ground state electronic configuration of N,, molecule is written asS, KK, (A) 3, (C) 0, , 0, >0'>0:, , (C) o>0 >0 (D) 0z'>0>0, , B) 0, (D) 0, , (5), , 42. (A), 52., , (B), , 43. (C), 53. (C), , 44. (A), 54. (B), , 45. (A), 55. (B), , 46., , C), 56. (C), , 47. (B), , 48. (A)

Page 4 : Bonding andMolecular, , emk, , Struoture, , not present in, , is, , According, , 67., , Glyeie, , (R) Ware, , Hydrogen, , sulphide, , that, , with, , ON., , is, , C ) C N, , number, , (D) NP%. C.E.T. 2000), shared by cach N atom, of electrons, , 69., , The, , is, , The, , of, , shape, , to valence shell, CIO; according, theory will be, , repulsion, , electron pair, triangle, Planar, , 70., , Pyramidal, , (B), , A), , (C), , (4.F.M.C. 1998), , (D) 4., , (C)3, , (D) Square planar., , Tetrahedral, , (M.P.C.E. T. 1998), , ., , The, , mber, , of antibondir, , basis, , the, jon on, , (C) 2, , electron, , pairs, , in, , theory is, (B) 3, (C.B.S.E. 1998), (D) 5., the tollowing is not, , among, , Which one, paramagnetic ?, , Be=4;, , Ne= 10; Cl=17; As=33), , ,Which of the following, , ., , (C.B.S.E. 1998), hydrides has the lowest, , 73., , (A) KCI, , (B) CaCh, , C) BeClh, , (D) BaCh, , Which of the, , 74., , having bond order 3 is, , (B) N2, , (D) He., , 65. The hydrogen bond is strongest in, (B) S-H..0, (A) 0-H...S, , to, , 75., , 76., , (M.P.C.E. T. 1998), Fazan's rule, covalent bond is, , (B) BF, , (C) PCI, , (D)BO, , (D) 3. (M. P. C.E.T, ?, following is paramagnetic, , (C) CO, , (D) NO*., , (A) distillation, , (B) crystallisation, , (C) vapourisation, , (D) colour spectrum., (C.B.S.E. 1999), , O2 molecule is, , (A) paramagnetic, , (B) diamagnetic, , (C) ferromagnetic, , (D) none of these., , Which of the, (A) C-O, , 69. (C), , is, , most, , polar ?, , (B) C-F, , (D)N-F.(C.P.M.T., , 1999), , of N2 and NG is, dissociation energy of, , N2, , =, , dissociation, , energy of N, , (E.A.M.C.E.T. 1998), , 60. (B), 70. (A), , following bonds, , The relationship between the dissociation energy, , (B), , 68. (B), , 1999), , (M.P.C.E. T. 1999), The most suitable method of the separation ofa, mixture of ortho and para-nitrophenol mixed in, , (B) Large cation and large anion, C)Small cation and small anion, (D)Small cation and large anion., , 67. (B), , (B) 2.5, , (B) CN, , (A), , 59. (C), , ?, , (M.PCET. 19999, , (A) O2, , favoured by, (A) Large cation and small anion, , 58. (C), , be octahedral, , (A) SF6, , (C) 0-F, , (D) F-H...0., , C) F-H..F, , (C), , following will, , (C.P.M. T. 1999), , (M.P.C.E. T. 1998), , Answers, S7., , Ph. C.E.T 200, , (M.P.C.E. T. 1998), , (A) H2, C) O2, , most covalent, , the ratio of 1: 1 is, , (D) HTe., , The molecule, , According, , Which chloride should exhibit the, , 72., , (B) HS, , (C) H2Se, , is, , (D) All electrons, (MPCET I 9, , (A) 2, (C) 15, Which of the, , boiling point ?, , (A) H2O, , there, , (B) 4 electrons, , The bond order in O; is, , (D) Ast., no., , two atome, , double bond connecting, , 71., , (B) Ne2*, , (A) Be, (C)C, (At., , a, , 0, , of MO, , (A) 4, , In, , type of bond ?, , (B) 1, , (4) 2, , (AMFI I9, , a sharingof, (A) 2 electrons, (C) I electron, , (B) O, , A) O, , (D)Liner, , (M.P.P.MT 1998), , soelectronic, , is, , The, , in N, , of the, , shape, , the, , ( B Distorted tetrabedral, , (A) Octahedral, (C) Planar triangle, , D)Hyuurogen fluoride, , ion, , hery,, , Water molecule is, , n f i n g, , A), , VSUPR, , t, , 61. (A), 71. (B), , dissociation energy of, , N2 can either be, , lower, , or higher than the dissociation energy, , of N, 62. (C), 72. (A), , 63. (B), 73. (A), , 64. (B), 74. (A), , 65. (C), , 66. (D), , 75. (B), , 76. (C)

Page 5 : Dinesh Objective Chemistry (p, , 244, (C)dissociation, , disociation, , N,, , energy of, , N., , The shape of the molecule SPC1,, , (A) trigonal bipyramidal, , energy of N, , (B) cubic, , (D)association energy, , of, , N3>, , dissociation, , the following ions the p n-dn overerlap, , could be present in, , (D) tetrahedral, , co, , hybridisation of sulphur in So,, (B) sp, (D) sd', , (A) sp, , ( D )N O C B S E, , (Kerala EE, , (E) square pyramidal., The, , N7., , (B) PO, , A) NO, s., , (C) octahedral, , RS20K), , energy ofN, Among, , (C)sp, , 20NX), , (E) spd', , Kerala EEE n,, , following forces dominates, , (A) CC, , (B) PCls, , (C) BeCl2, , (D) BCl3., , together ?, , (C.B.S.E. 2000), , (A) XeO, , (B) XeO,F, , (C) Xe0>F2, , D) XeF4. (C.B.S.E. 2000), , Polarisation of electrons in acrolein may be, written as, , (B) CH = CH-CH = O, C) CH2 = CH-CH, , (B) van der Waal forces, (C) Hydrogen bond formation, (D) Covalent attraction, (E) lonic interaction., 89. The umber of electrons that are E. EE. D, paired in, molecule is, (A) 16, (B) 12, (C)7, (D) 8, (E) 14., E., 90. The structure of, CH2=C=CH2 is E, (A) linear, , (Kerala E., , O, , +, (D) CH = CH-CH 0., , (C.B.S.E. 2000), , (B) planar, (C) non-planar, , 81. Which of the following is not paramagnetic ?, , (D) has several resonance structures, , (A) N, , B) CO, , (C) O5, , (D) NO. (C.B.S. E. 2000), , (E) dissymetric., 91., , 82. Which one of the following molecules will form, a linear polymeric structure due to hydrogen, , (A) sp3, , (C) H20, , D) NH3. (C.B. S.E. 2000), are inclined, , (A) Tetrahedral, (C) Angular, , at an angle of, , (B) 180, , C) 109°- 28', (D) 60, (B.H.U. 20O0), 84. The bond length between C- C bonds in, sp<, , hybridised molecule is, (A) 12Å, (B) 1-32 Å, , D) 14 A. (B.H.U. 2000), having non-zero dipole moment is, , (E) BH6, , (B) CH4, (D) BF3, (Kerala E.E.E. 2000, , (B) sp2, (D) spd, , (KeralaM.EE 2, , 92. The shape of gaseous SnCl, is, , Carbon atoms in benzene molecule, , (C) C2H6, , (Kerala M.E.E. 0, hybridisation of xenon in XeFz is, , (E) sp'd., , (B) HF, , (A) 120°, , The, , (C) sp'd, , bonding, (A) HCI, , (A) H02, , holding th, , (Kerala, , (A) CH =CH-CH = 0, , (C)154A, 85. The molecule, , for, , ther um, , one, , (A) Dipole-dipole, , Which of the following is planar ?, , 83., , i, , Among the following the electron deficient| 88. Two, they unite, ice cubes, to form, are one, pressed, blocoverWhich, cach, h, , compound is, , S0., , Pys, , 93., , (B) Linear, , (D) T-shaped, , (E)Distorted Tetrahedral. (Kerala M.EE. 20, Which of the following substances has, the les, ionic character ?, (A) FeCl2, (C) CdClh, (E) HgClh., , (B) ZnClh, (D) MgCh, (Kerala M.E.E. 200, , 94. Which one of the following molecules willhae, unequal bond lengths?, (A) NF3, (B) BP3, (C) PFs, (D) SF6, , (KeralaM.E.E.20, , (E) SiF4., , Answers, 77. (B), , 78. (D), , 87. (A), , 88. (C), , 79. (D), 89. (E), , 80. (B), , 90. (B), , 81. (B), 91. (C), , 82. (B), 92. (C), , 83. (A), , 84. (D), , 93. (B), , 94. (C), , 85. (A), , 86. (A)

Page 6 : onding and Molecular Structure, , p n e m i c a l, B, , o, , n, , d, , r, , d onder of individual C-C bond in, , (A)CH,OH, , DNone, , n e n e, , and two, , one, )erwen, , two, , an, , D)e, , M, , most, , ond, , alent, , 106. The boiling point of heavy water is, , MPCE1 2001, , altermately., , the, , of, , which, , 4H, )I, , molecules,, following, ?, , is the, , polar, (B) HBr, , (D) H2.MP CE I 2000), following compounds, which has, , the, , Among the, d, , i, , p, , o, , l, , e, , m, , o, , m, , e, , n, , a, , t, , (B) CH, A)CCL, , )BF, Which, , of the, , D) HF. M.P.C.E.T. 2000), following is least ionic ?, (B) KCI, , A) C2HCI, , (D) CH,NH,CI"., , BaCl, , M.P.C.E.T. 2000), The, , number, , molecular, , bonding electron pairs in 0, , of, , ion, , on, , the basis of MOT is, , (B) 3, , A) 4, , (D) 5. (M.P.C.E.T. 2000), , C)2, , .Mostefficient, (A)sp-sp, , overlapping is, , (B)S-S, (D) sp sp., , C)sp-sp, , (Delhi P.M.T. 2000), , F; has, , the, , föllowing hybridisation, , (B) spd, , (A) spd?, C)sp'd, , (D) None of these., , Antibonding MO, , (DelhiP.M.T. 2000), is formed by, , (A) Addiion of atomic orbitals, B) Subtraction of atomic orbitals, , C) Multiplication of atomic orbitals, D) None of these., (Delhi P.M.T. 2000), , 3. The bond order of O, is, (A) 05, (D) 3:5, , D) 25, , (A) 2 o, 1 T bond, , C) 2 o, 2 r bonds, , . Which, , is most, , (Delhi P.M.T. 2000), , (B) 1 o, 2 r bonds, (D) 2 o, l T, one lone pair., (Delhi P.M.T. 2000), , viscous?, , 1050 696., ., , (C), , 97. (D), , (C) 107. (A), , D) 110Cc, , 107. Fluorine molecule is formed by, , (A) The axial p-p overlap, (B) The sidewise p-p overlap, (C) The axial s-p overlap, , (D) The overlap of two sp hybrid orbitals, , Kerala PMT 20, 108. The correct order of bond angles in the, molecules, H,O. NH3. CH, and CO is, (A) HO > NH3 > CH> C0, , (B) H20 < NH3 < cO < CH, C) H0< NH3 > CO > CH, (D) HO> NH3 < CH > cO, , (E) CO > CH> NHJ > H,O, (Kerala P MT, 109. Which of the following arrangement of molecules, is correct on the basis of their dipole momes, (A) BF3 > NF3> NH3, , (B) NF3 > BF3 > NH, C) NH3 > BF3> NF3, (D) NH3 > NF3 > BF, , (E) NH= NF3 > BF3, , (Keraia C.ET. 200, , 110. The, , boiling point of para nitrophenol is greateEr, than that of ortho nitrophenol, because, (A) there is intermolecular hydrogen bonding in, para nitrophenol and intramolecular hydrogen, bonding in ortho nitrophenol, (B) there is intramolecular hydrogen bonding in, para nitrophenol and intermolecular hydrogen, bonding in ortho nitrophbenol, (C) both have the same kind of hydrogen bonding, , (D) para introphenol is polar, while ortho, nitrophenol is non-polar, (E) van der Waal's forces are stronger in ortho, , covalent and co-ordinate bonds as well?, , B) CusO 5H, O, (A) CaSO45H2 O, C) HCI, D) NaC. D.C.E. 2001, 112. Which of the following has sp* hydridisation of, central atom ?, , (A) XeO3, C) XeF, , Answers, , 95. (C), , (B) 101 4°C, , Kerala C.E.T. 200, nitrophenol., 111. Which of the following compounds shows ionic., , (B) 1-5, , 04, In O3, there are, , (A) 108°C, C) 99°C, , 4FM, , H C T, , ., , 4, , CHOH, , 4, , ., , B)CH,OM, , 98. (A) 99. (A), 108. (E) 109. (D), , 100. (C) 101. (A), 110. (A) 111. (B), , (B) BCl3, , (D)BBr., 102. (B), 112. (A), , DC.E 200, , 103. (B), , 104. (D)

Page 7 : 246, , Dinesh Objective Chermistry (, , mistry (Phiye, , 122. A square planar complex i, , 1Shape of ClO is, , hybridisation of which atomic orhit, (A) 5, P Py, P, , A) Triangular pyramidal, B) Tetrahedral, C) Triangular planar, , (B)s.P.P da, , (D) s.PP,d,, (C)s.PrPy d,2 s.Pr., P., AFM, , (D) Triangular bipyramidal, , 20001), , 114, Sidewise overlap of p-p orbitals forms, , 12.3, Which, , and p,, , overlap, , forces of attraction, , repulsion, , D) In covalency,, (C.B.S.E. 2001), , l16, Which pair among the following is isostructural?, , (C) 17, , transferance, , (A.I.E.E elect, E21, , carbon having sp° hybridisation, , C) co,so, , (D) PCl5, 1Cly, , (A) CHCOOH, , (B) 3, (D) 5., (Rajasthan P.M.T. 2002), , 118, Which of the following is soluble in water?, , (A) CS2, , (B) CH,OH, , (C) CCl, , (D) CHCl3., (Rajasthan P.M.T. 2002), , Dipole, , moment is, , shown by, , (A) 1,4-Dichlorobenzene, , (B) cis 1, 2-Dichlorobenzene, (C) rrans 1, 2-Dichlorobenzene, , (D) trans 2, 3-Dichloro-2-butene., , (Rajasthan P.M.T. 2002), of F, C, Br and I are, , 120. The electronegativities, 40, 3-0, 2.8, 25 respectively. Hydrogen halide with, , high percentage of ionic character is, , (A) HF, (C) HBr, , 121, Which of the, coordinate bond?, , (A) BH, , (C) COg, , (B) HCI, (D) HI., , (Rajasthan P.M.T. 2002), , following, , does not contain, , (B) NH, , D) HO, (Rajasthan P.M.T. 2002), , of, , is, , (D) 16. (A.I.E.E.E. 2, following species is the und, , derine, , (B) CHCHOH, (D) CH, , (C)CHCOCH, , =, , 17. Number of 7-bonds in naphthalene is, , a, , the, , (B) NH3, BF, , (A) 6, , e., , overcome theplacefore,w, , (A) XeF2. IF, , (C)4, , nod, , takes place., 124. Number of sigma bonds in, P4O0, (A) 6, (B) 7, , 125. In which of the, , (C.B.S.E. 2001), , is t, , C) Chemical bond formation takes, , The orbitals, , to, , (B) o molecular orbital, (C)8 molecular orbital, (D) no bond will be formed., , 119,, , statement, , pure water does, , ions, , form, (A) r molecular orbital, , P, , Absolutely, , (B), , (4.F.M.C 2001), Main axis of diatomic molecule is Z., , AIEE, , of thefollo, , (A) HF is less polar than HBr, , (A) Sigma bond, (B) Pi bond, (C) Coordinate bond (D) H-bond., T15,, , formed, , 126, In, , XeF2, XeF4 and Xef6,, pairs of Xe is respectively, , (A)2,3, 1, , CH-CH, , 4.I.E.E.E. 2, the, number, , of I, , B) 1,2,3, (D) 3, 2, 1., , C) 4, 1,2, , (A.1.E.E.E, 127. The bond order of Oz is, (A) 1, C) 2:5, , (B) 1-5, D) 3., , 128, Which of the, moment ?, , (Bihar C.E.E. 200, , following, , (A) CIF, , has, , zero, , dipole, , (B) PCl3, (D) CFCl., (M.P.P.M.T. 20, , (C) SiF, , 129. The correct sequence of decrease in the bond, , angles of the following hydrides is, , (A) NH3> PH3> AsH3 SbH3, (B) NH3 > AsH3 > PH3> SbH3, , (C)SbH3 > AsH3 > PH3> NH3, , (D)PH, 150, In, , >, , NH3, , OF2, number, , >, , AsH3>, , SbH3., , (M.P.C.E.T.20, , of bond, , pairs and lone pairs o', electrons are respectively, , (A) 2, 6, (C) 2, 10, , (B)2,8, , (D) 2, 9. (D.P.M.T. 2001, , Answers, 113. (A), 123. (C), , 114. (B) 115. (D), 124. (D) 125. (B), , 116. (A) 117. (D), 126. (D) 127. (C), , 118. (B) 119., (B), 128. (C) 129., (A), , 120. (A), 130. (B), , 121. (C) 12., , D

Page 8 : nding and Molecular Structure, , NÁAÍ Bondin, , number of honi pairs and lone, ns are respectively, , (B) 3. 1, (D) 4, 8., , CRSE PMI N)2, i n has p n, ing, dn bonding?, , follow, , ofthe, , (B)SOj, (D) co, , hh, , ,, , N O, , B, , a, , c, , Which of the fotowing, , ot, , simple example of, , 4 A., , (A), , B), , (D) non-covalent ion, , effect in this regard., (B) Sigma-bond is stronger thans ph-tond, , respectively., (D) Free rotation of, , electrons in an atom implies, , case, , of, A pair, electrons, , air or, of, , A, , C), A, D), , (4/PMr 200, , anion HCOO the two carbon oxygen bosnds, What is the reason, are found to be equal length., an, , in bonding, electrons, pair of., electrons not involved in, valence, o f va, pair, (Kerala C.E. T. 2002), involve, , hybridised, (B) The C=0 bond, , implies, , bond, , repulsion, , attraction, , balanced at, and repulsion, , particular, , (C)attraction, , distance, , D), 16., , attraction, , and repulsion., , (Kerala C.E.T. 2002, , ionic compound whereas, covalent because, , chloride is an, Sodium, chloride is mainly, bydrogen, , (A), , reacuve, Sodium is less, , non-metal, , is a, B) Hydrogen chloride is a gas, (C) Hydrogen, difference in the case of, D) Electronegativity, chlorine is less than 2-1., hydrogen and, (Kerala C.E. T. 2002), , have low melting points, 137, Covalent compounds, because, have definite shape, (A) covalent molecules, , (B), , (C), (D), , has two resonating, , (D) The anion is obtained by removai of a proton, , Chemical, , (B), , are, , structures, , bond, , (A), , atom, , is weaker than the C-0, , (C) The anion HCOO, , bonding., , ,, , of, , of a pr bond, , for it ?, (A) Electronic orbitals of carbon, , valence electrons, , A pair, , are, , atoms about a sigma brnd, , is allowed but not in, , 40. In, , (Aerala P.M.T. 2002), , these., , (E), , ra, , for sigma and pi, carbon atome 7, betwe, (A) Sigmateond determires the direction, has, primary, carbon atoms but a piend, , k/mn, the order of 264 kJ/mol and 47, , acid provides, (B).noncovalent compound, tinate bonds, , None, , eenroe, , d s fremed between, , Sulphurne, , C) ovalent ion, (A), , n, , statement, , (C) Bond energies of sigma and pi-ends, , (C.BS.E. P.MT. 2)2, , O, , ,, , covalent bond is weaker than ionic bond, , covalent bond is less exothermic, covalent molecules are held by weak, , (Kerala C.E.T. 2002), , present in, , en-1 yne is, , (A)3 10, , (B) 9, 4, , C) 4,9, , (D) 10, 3., , pent-4, , (A.LI.M.S. 2002), , Answers, 131., , (D), 141. (B) 132. 133., 41., 142. (C) 143., , from the acid molecuie. (4.1 E. EE 2003, pair of species having identical shapes for, , molecules of both species is, , (B) XeF2, CO, , (A) CF4, SF, (C) BF3, PCl3, , (D) PFs. IFs, (4.1.E.E, , E 2003, , 142. The ion which is not tetrahedral in shapeis, , (A) BF, , (B) NH, , (C) Cu(NH3, , (D) NiC., , 4.1.1.M.S 2003, , 143. Which of the following compounds possesses, C-H bond with the lowest bond dissociation, , energy?, (B) Benzene, , (A) Toluene, (C) n-Pentane, , (D) 2, 2-Dimethylpropane., , (A.1.1.M.S. 2003, , 144. Maximum hydrogen bonds in water are, (B) 3, , (A) 4, C) 2, , van, , der Waal's forces of attraction., , 8, The number of o and T-bonds, , 141, The, , 145 sp° has s-character, (A) 1/2, (C) 1/8, 146. Which one is, metal ?, (A) 2, 8, 8, 1, (C) 2, 8, 18, 1, , (A), , 134., , (D) 135. (C), , 136. (B), , (A), , 144. (A) 145. (B), , 146. (A), , 137., , (D), , (D) 8., , (Wardha OOB), , (B) 1/4, (D) 1., , (Wardha 2003), , configuration, , of, , most, , metallic, , (B) 2, 8, 2, , (D) 2, 8,, , 138., , (D), , 139., , 1. (Wardha 2003), (C), , 140., , (CD

Page 9 : 248, 147.What tvpe of hybridisation takes place in the, N atom of NH,?, (A) sp, , (B) sp, , (C) dsp?, , (D)sp, , Dinesh Objective Chemietry(, , C)sp hyhridized carbn, (D) Always, 15., , 2one ar, 1one, , deduce the electronic configuration of the, singly positive nitrogen molecular ion N2* as, , can, , 2422"ap', , (D), , 2©"ap, , (B) H2 S< NH3 < BF^ < SiH, (C)Ha< NH3 < SiH4 < BF, , (D) NH3<, , angle ?, , C) sp and sp, , B) BeF2, (D) CH4, , 156., , (E) SO2, , (Kerala C.E.T. 2003), the, correct statement from below,, Identify, concerning the structure of CH2 = C = CH2, is in, , hybridized state, , an, , Which, , (B) sp and sp', (D) sp and sp'., , (A.I.E.E.E 204, , of the following has, the reile, tetrahedral structure ?, one, , (A) XeF4, , (B) [Ni(CN),H, , C) BF, , (D) SF., =, , CH groups being in planes perpendicular, , 157. The bond order in NO is 2:5 while, that, NO is 3. Which of the following statements inis, , true for these two species ?, , to each other, , (A) Bond length in NO", , (D) All the carbon atoms are sp-hybridised, (E) The molecule is bent with, theC-C-C, angle being l120 degrees., , NO, (B) Bond, , is greater than in, , length is unpredictable, , C) Bond length in NO* is equal to that in, NO, , (Kerala C.E.T. 2004), , D) Bond length in NO is greater than in NO"., , electronegative ?, , (A) sp-hybridized carbon, (B) sp-hybridized carbon, , (B), , BF., , (A.I.E.E.E. 2004, (Atomic nos. B=5, S=16, Ni=28,, Xe $4), , sp°., , (C) The molecule is non-planar with the two, , 157. (D), , <, , (A.I.E.E.E, 24, of boron, of, hybridization«, and, atoms in boric:acid, (H3BO3) are respectivelyoxve, (A) sp and sp2, , (Kerala C.E. T. 2003), , Answers, 147., 148., , H2 S < SiH4, , I55. The states, , 150. Which one of the following has the smallest bond, , atoms, , angles (smalles, , (A) HS < SiH4 < NH3 < BF, , 22pap2p, , (A) The molecule is planar, (B) One of the three carbon, , (Kerala CET, , The correct order of bond, , in H2 S, NH3, BF3 and SiH, is, , 22 20,,2, , C), , air, , of tle., , respectively., , 154., , A) 1 2 2 2 p " 2 p ', , 152. Which carbon is more, , one pair, , ndone i, , N bond in N2, , (A) NH, (C)H0, , CF, Xep., are, , electrons respectively, (C) Different with 0, 1 and 2 lone, electrons respectively, (D) Different with 1, 0 and, and 22 lone, electrons respectively, (E) Different with 2, 0, 1 lone pair, , (D) O=0 bond in O2, (E) C-C bond in ethane. (Aerala CLT 200), 149. From elementary molecular orbital theory we, , 151., , same with, , (B) The same with 1, I and 1 o, , (B)C-H bond in CH4, , 2, , erala ybrd, F w, , 2, 0 0and 1, electrons respectively, , concerned?, (A) H-H bond in H, , (E), , Molecular shapes of SP4,, (A) The, , amount of bond energy to dissociate the atoms, , (B) 1 ,, , irrespective of its h, , (E) None of the above, , 148. Which of the following bonds require the largest, , (C) N, , same, , 158., , (A.1.E.E.E. 2004, , The maximum number of 90°, angles between, bond pair-bond pair of electrons is observed in, , (C) 149. (A) 150. (C) 151. (C) 152. (B) 153., (D) 154. (c) 155. (D) 156., , 158. (B), , 0

Page 10 : and Molecular Sth, Structure, Molecular, , >NO, , and, emioca, B, l, o n, , hridisation, , alBonding, , ds-hybridisation, , A ), d yh y h r i, , ( B ) s p ' d-hybridisation, , (A) NO>NOJ, , (D) s p ' d-hybridisation., , (B) NOj> NO,, , 41EE., , >, , NOJ, , (C) NOJ>NO2> NOj, , 2004), , U 4 K P M I, , Cog., , cOp., , CO,,, , CHCO0,, , Co,, , longest carbon-oxygen bond, , s p e c i e s, , the, , 167., , o., ng, A, HCHO, whichhas, , (B) C H , C O 0, , (Kerala, , ( E )H C H O, , e, , t, , h, , a, , P.M. T., , 2004), , invotves, , n, , (C) H20, BeF2 is, , c, , (D) H20 is, , point, boiling, , e t h y lt h i o l, , hydrogen bonding, intramolecular, molecular hydrogen, intermo, , because, , The, , is, , d, , methanol a n d, , There, , A), , in, , bonding, e r e, , B ), , 168., , thiol, , in, , i s, , methyl, , ecular hydrogen bonding, , and, , no, , hydrogen, , There is no, , methanol, bonding in, hydrogen, bonding in, hydrogen, , 169., , intermolecular, , and, , methyl thiol., , There, , is, , no, , hydrogen, , hydrogen, , intramolecular, , D), , and, , methyl t h i o l ., , d. Two, , nodal, , bonding, , planes, , are, , in, , in, , 170., , (D) 2p,, , C) 2p, , J&, , K P., , are, carbon atoms, the two, molecule,, , In acetylene, , ., , 0 linked by, , sigma, , two, bond and, , (A) one, bonds and, two sigma, (B), (C)three, sigma bonds, , 163., , similar to, , (C)HF2, I64., , angle is, , dipole, , in, , 172., , (D) NO, , (A) Trans-2-butene, , C) Acetophenone., , highest, , for, , (B) 1, 3-Dimethylbenzene, (D) Ethanol., (4.1.1.M.S. 2004), , I6. The decreasing order of bond angle is, , Answers, .D) 160., 9., , (B) 161. (A), (D) 170. (B) 171. (A), , the lone, , d.dA.LP.M.T. 2004, pairs occupy equatorial, , positions to minimise, , only, , pair-lone pair repulsion, only, lone pair-bond pair repulsion, only, bond pair-bond pair repulsion, , lone, , and lone, , pair repulsion, (A.I.P.M.T. 2004), pair-bond pair repulsion. in which the rwo, the pair, Among the following,, lone pair-lone, , iso-structural, , and, , Decreasing, , XeOs, , is, , (B) SiF; and SF, and, , (D) BH, , NH4, , (4.LP.M.T. 2004, , order of C-C bond, , length, , is-, , (LD CH2, , (TV) C2H6, , >I> I, (A) IV> I IV>, II, >, (B) I> II, (C)II > I> V > II, II., D) IV> I> II >and, How many sigma, , (A) 3 n, , +, , T, , +, , (C) 3, , (4.1.I.M. S. 2004), is the, , orbitals, , (Orissa J.E. T. 2004, bonds, , pi, , are, , present in, , toluene ?, , (B) NO2, , moment, , BrF molecule,, , (11) CsH6, , that of, , maximum, , (D), , () CH4, , 2004), , (A.1.I.M.S. 2004), , (A) NO, C) NO, 165. The, , C.E. T., , (B) H02, (D) C2H2., , (A) CF2, , The ONO, , 171., , (Karnataka, , (D) three pi-bonds., , is, Shape of O,F2, , pi-bond, , one, , In, , (C)105, , pi-bonds, , BeF2 angular, A.LPMT., 2004, , (B)d, , species are not, (A) P and SF6, , M.T. 2004), , molecule, , of d, structure, the pair, octahedral, In, hybridisation is, involved in dsp>, , (A), (B), (C), (D), , bonding in, , (B) 2P, , (A) T2P, , linear and, , whereas, , an, , methanol, , T. 2004), (Kerala P.M., , present, , a discrete, , C)d, d, , nethanol, , in, , methylthiol., , bonding, , hydrogen, , (A) dy. 4, , bonding in, , intermolecul, , T h e r e, , electronegativity, , that of O., , than, methanol is greater, , m, , of, , bhecause, (D) NOj>NOj NO, is on. t is, whereas BeF2, is linear, H2O is dipolar,, and BePz, han, is, angular, (A) H20, of F is greater, , (B) the, , (D) CO, , A), CO, , 2104, , 162. (A) 163. (B), 172. (C) 173. (A), , 8, 15, , o, , (B) 3, (D) 6, , + 6o, 7, , +6, , o., , (Kerala Engg. 2005, , totally polar, the, 6-12 D (debye), expected value of dipole moment is, moment was, but the experimental value of dipole, , of HCI, 173. If the molecule, , were, , character., 1-03 D. Calculate the percentage ionic, (B) 83, (A) 17, , 164. (D) 165. (Cc), , 166. (C), , 167. (A), , 168. (B)

Page 11 : Dinesh Objoctve Chemistry (, , 250, , (D) O, <, , C) 50, E)90, , (D) Zero, (Arala I ngg 005), , 4, Which one of the follow ing molecules has the, , smallest bond angle ?, , (A) NH, C)H0, E) HS., , (Aerala Engg., , 2000), , 75, Which one of the following species is diamagnetic, , I8I, Correct sequence of increasing, , (D) BeCh, LiCI, NaCI, 182, Which of the following, , (A) He, , C) PH, , (B) H2, , (D) H. 4.I.E.E.E.2005), (C)H, 6,, Lattice energy of an ionic compound depends, upon, , (A) Charge on the ion only, B) Size of the ion only, (C) Packing of ions only, D) Charge on the ion and size of the ion., , (A.I.E.E.E. 2005), 177. The molecular shape of SF4, CF and XeF are, (A) The same with 2, 0 and 1 lone pairs of, electrons on the central atom respectively., (B) The same with 1, 1 and 1 lone pair of, electrons on the central atoms respectively, , C) different with 0, 1 and 2 lone pairs of, the central atom, , respectively, , D) different with 1, 0 and 2 lone pairs of, on, , the central atom, , respectively., , (4.1.E.E.E. 2005), 178, The number and type of bonds berween carbon, atoms in calcium carbide are, , (A) two sigma, one pi, (B) two sigma, two pi, , (C) one sigma, one pi, , (D), , one, , 179. Of the, , sigma, two pi., following sets, , isoelectronic species '?, , (A.1.E.E.E. 2005), which does not contain, , (A) PO, So.CIo, (B) CN, Na, C, , so. co, NOz, (D) BO. co, NO, , (4.1.E.E.E. 2005), , AILE, , electe., , (B) CH6, (D) SiH, , following, , dipole moment?, (A) BF3, (C) SF4, 184, In which of the, , AILEE, , would have, , ., , ermane, , (B) SiF, (D) XeF4., , A.I.E.EL, , lowing molecules the, , atom does not follow the octet nule, , (A) CO2, (B) BF, C) HO, (D) HS, (E) PCl3., (Kerala Medical 2, I85, Which one of the following, statements is th, (A) The dipole moment of NF3 is Zero, (B) The dipole moment of NF3 is less, (C) The dipole moment of NF3 is more than M, w, D) The dipole moment of NF3 is equalthan, to, NH, (E) The dipole moment of NH3 is, zero,, , (Kerala Medical 2y, , 186, The correct order of, the is ; energies, following ionic compoundslattice, (A) NaCl > MgBr2 > Ca0 > Alh0;, (B) NaCl > Ca0 > Mg Br2 > AlO, (C)AlO3> MgBrz > Ca0 > NaCl, (D) MgBr > AlL03> Ca0 > NaC, (E) AlLO3> Ca0 > MgBr2>, , of t, , NaC, , (Kerala Medical 200, , 187, Bond angle in water is, , (A) 120, , (B) 109-5°, , (C) 107, , (D) 104 5, (Kerala Medical 2005, , 188, Which of the, (A) BeCl2, , 180. The correct order in which the 0-0, bond length, increases in the following is, , (A)H202 O2 < Og, (B) O3< H0 < O2, (C)O < 03 < H0, , 183, Which of the, , (E) 90°, , (C), , is, , molecule ?, , (A) BH, , electrons, , aert hvat, , is represeted by, (A) LiCI, NaCI, BeCl, , in nature?, , on, , 0,, , (B) BeC12, NaCI, LiCI, (C) NaCI, LiCI, BeClh, , (B) PH, (D) HSe, , electrons, , H,0, <, , (C) SO2, , following, , is, , a, , linear, , (B) H0, (D) CH4., , molecule ", , (E.A.M.C.E.T.20, , 189. Which of the following is correct?, (A) The number of electrons present, , in th, , valence shell of S in SF% is 12, (B) The rate of ionic reactions are very slow, , Answers, 174., (D), , 184. B), , 175. (B) 176. (D) 177. (D) 178. (D) 179., (C) 180. (C), 185. (B) 186. (E) 187. (D) 188. (A) 189., (A), , 181. (C), , 182. (A), , 183., , (C

Page 13 : Olneeh Objoctive Chamistr, , istry (Physe, , A non bonding electron pair haud, , In Te4, the central atom, tellurn, involves, , repulsive force than a bonding, , (A), , () p'd, , (C), , () dp, , Mateh, , the compounds, , (B) I and 2 only are correct, , (C) 2 and 3 only are correct, , Vellore 200, , (D) 1 only is, , in, n the List I with that, , 205., , () Ney, )NeO, , I. Planar triangular, , (HO, , 3. Trigonal pyramid, , 2. T shape, , pairs, , (A) O2, NO, , (B) 0.0, , D) NO, N0, , (Kerala P.M.1, , atom in Hn, , (A) spd, , (B) sp, (D) sps, , C) sp, , 6. Bent., , (Kerala P.M.T., , (E) sp'd'., , 207. Which of the following is paramagnetic, , A)a-1, b 4,c - 3, d- 2, e -5, ()-3. b-4,c- 1, d- 2, e - 6, , order 0-5?, (A) F2, , (B) H, , D)-3-4. c-1,d-2. e-5, , (C) N, , (D) O, , (8)-2,-4, c-1, d -3,e -6, , - 3 , - 4 , c -2,d- 1, e-5, (Kerala P.M. T. 2007), The curect order of bond order values among, , the followiN, , ) NO () NO*. () NO, () NO}t, (e) NO, ), , d, , (Kerala P.E.T. 2, peroxide, gOetic, , diamaenetie, , (Gujarat C.E.T. 207, , <a <e <c, , (C)e a <d, , D), , E) B, , 208. Which of the following is correctly has, molecular orbital theory for, ion ?, (A) Its bond order is two and it is diamapn, (B) Its bond order is one and is paramaene, (C) Its bond order is two and it is paramame, D) Its bond order is one and it is, , <c <b <e, , 8) d, , 209. Which has highest dipole moment?, , =c <b, , c <d <a <e, , a<d, , (A)C-0, , <c <b, , (Kerala P.M.T. 2007), The bond length and bond angles in the molecules, of mechane, ammonia and water are given below, , 0-109 nm, , H1095, , 1 0 1 nm, , H, , 0-096, , 107 H, nm, , (C), , H, , -, , Hc, 210. The magnetic, , B), , hydro, , in the molecule., , non-bonding, , electron pairs, , H,C, , moment of, , KO2, , CH, at room, , temperature is . . ., , BM, , A) 141, , B) 173, , C)2-23, , (D) 264, (Orissa J.E.E. 2007, , 211. Shape of CIF is, , gen atoms as the bond length decreases., , H,C, , D) ChC, Chp, H, CH, , 1043 H, The variation in bond angie is a result of, I. The increasing, repulsion between, , The umber of, , Consista, , (C) Co, NOo, , (E) O,N, , 5. Linear, , 2, , (Kerala PM, , (E) 3 only is correct, Which of the following, , 206, The hybridization of oxygen atom in H., , 4. Square pyramid, , 4, , correct, , paramagnetic species ?, , Tist, , 204, , ng eletm e, , (A) 1,2 and 3 are correct, , the hybridiratiom, , (A) Equilateral triangle (B) Pyramidal, C) V-shaped, (D) T-shaped., , (OrissaJ.E.E. 200, , Answers, , 202. (D) 203. (C), , 204. (C) 205. (A), , 206. (D) 207. (B), , 208. (D), , 209. (A) 210. (8)

Page 15 : 284, , Dineeh Objective Ghermistry (, , 26. The common feanires among the pecies N | 24, The number of bonding and, and NO' are, electrons renpectively in C, (A)Bond order three and iso electronic, (A) 8,2, (B) 2,, (B)Bond order three and weak field ligands, C) 4,2, (D) 2,4, , moleauM, , C)Bond order, , rwo and n acceptor, (D) Iso electronic and weak fields, , (Chhatisgarh PI M, , PMIH235, The bond order in He ions i, It is believed that atoms combine with each other, , (A) 05, , such that the outer most shell acquires a stable, , C) 15, , (B)19, (D) 20, , configuration of 8 electrons. If stability were, attained with 6 electrons rather than 8. What, , would be the formula of the stable fluoride ion., (A)F, (C)F2, ., , (B) F, (D)F* (D PMT. 2009), , The correct statement with, , H, , regard, , to, , H;, , is, , (D)8, , 237. How many, , a(sigma) bonds are there, , (Chhattigarh P.E. MT, , (A) Both H and H are equally stable, , CH = CH-CH = CH2?, , (B) Both H, , (A) 3, , (B) 6, , C)9, , (D) 12., , and H, , do not exist, , (D) H is, , more, , stable than, , Arrange the following, theirbond order:, , (A)O2., , H, , Karnataka C.E.T. 2009), in the increasing order of, , 0.0, and O, , (B), , O.0. Oz.0, , C), , 0,02, 0z, 0, , 232. The, , >, , sp (D) sp, , atom are equal in :, , >, >, , sp, , sp<, , >, , >, , sp, , sp°., , D.U.M.E.T 2010), bond formed by central, , (A) CH4, , (B) CH = CH, , (C) CH, , (D) CH, , (A) O2, , strengths, (B) O, , C) 05, , (D) O, , 239. The, , is in:, , (B) BrF, , (C)Sio, , (D) OsF2, , (I.T.2010, , 240. Peroxide ion ., , (i) has five completely filled, molecular orbitals, (i) is diamagnetic, (ii) has bond order one., (iv) is isoelectronic with neon., Which of the following are correct, , 229. (B) 230. (A), 239. (D) 240. (C), , antibonding, , (B) (). (i) and (v), (D)() and(i), , C)) and (in, , (Karnataka C.E.T. 2010, 241. In which of the following molecules,, the centn, atom does not have sp hybridization ?, , (B) SF, , C) BF4, , (D) CH4, (A.I.P.M.T. Mains 200, , Answers, 227. (B) 228. (D), 237. (C) 238. (C), , (M.P.P.E.T. 2, , (A) SOg, , (A) CH, , (Chhattisgarih P E M.T. 2010), 226. (A), , CH, , species having pyramidal shape is, , (A) (Gi) and (iv), , (Chhattisgarh P.E.M.T. 2010), , 236. (B), , are, , presen, given compound Ph-CH =C-CH, in t, , (C) 25 o and 4 t bonds, , sp (B) sp', , 233. The maximum bond, , t, , (D) 26 a and 4 n bonds., , and p characters in, , s, , (Chhattisgarh, P.E.M.T ,, bonds, , and, , a, , (B) 22 o and 4 n bpnds, , (D.U.M.E.T. 2010), 231. The bond angle formed, by different hybrid, orbitals are in the order, >, , 238.How many, , (A) 19 o and 4 n bonds, , (D) O,0,0.0 (Karnataka C.E. T. 2009), 230. Pi (T) bond is formed, by the overlap of, (A) p-p orbitals, (B) s-5 orbitals, (C) s-p orbitals, (D) s-d orbitals., , (A) sp>sp, C) sp> sp, , ake, , (C) 6, , and, , C)H is more stable than H, , 9., , (Chhatisgarh P.I. M1, , 236. The total number of electrons, that, forming bond in O is, (A) 2, (B) 4, , 231. (D) 232. (B), 241. (B), , 233. (B), , 234. (A), , 25 (A

Page 16 : Bondingand Molecular Structure, nnperties of the two species NO,, , are descrihed below., , H O, , Which, , one of, , a r e, , ridization for the central, , sumilar in hybric, , 248., , The bond afngle formed y, orbitals are in the onder, , (A)sp, , C)sp, , p> p, eth P 4I, , t h different structures, , au ural, , same, , with, , with, , 4ifferent yhrid, , hybridization for, , 249. Assuming that Hund's rule is vinlated. te ond, , order and magnetic nature of diatiomic molecule, , ural, , t r K, r, , e, , n, , r, , a, , l a, , t, , o, , m, , strAtural, ral with different hybridization for, , B is, , R, , c, , e, , n, , t, , r, , a, , l, a, , S u n i l a r, , t, , o, , m, , ation for the central atom, , i n, , h y b r i d i z a t i c o, , (A) I and diamagnetic (B)0 and diamag1etic, C)1 and paramagreric (D Omd paramagperie, , s t r u c t u r e s ., , o hd i f f e r e n, , 4IPMT (Main) 2010), , D, , I, , e, n, , do, , r, , of CO, , der, , d, , e, , r, , is, , molecule, , 250. In which of the, , following, bridge bond present?, , molecules, , (A) Water, , (B) Inorganic benzene, , (D) 3-5., , (C) Diborane, , (D) Methanol., WBIEE 2010, , (W.B.J.E.E. 2010), the, , has a, , following, , regular geometry, , (B) PCl, , D) SF, , A )CHC1, , O, , (Odisha J.E.E. 2010), , NeFs, , XF3 has, , tral molecule, most, 4, The X is, mOment., A, , C, , ), , c, , n, , D ), , i, , h, , t, , l, , r, , o, , o, , r, , i, , g, , n, , e, , dipole moment of, , (D) carbon, , (Kerala P. E. T. 2010), , T, , e, , c, , O, , and, , respectively., , B) in, , O7. the, O7., , D) N, , X, , Which is in, , weakened, N-N bond is, , N-N bond, , is, , weakened, , has the type of hybridzation which is not the, , increases, para magnetism, , becomes, , E) Boch O and, , diamagnetic, , O, , (B) 2-25 D, D) 3 D., (C) 1D, (W.B.J.E.E. 2010, 252. In which one of the species, the central atom, (A) 1-5 D, , t, , N. the, , In, , into mono positive, , are, , O, , A) In, , C, , dipole, , (B) boron, , e, , n, , N, , aions, r, , zero, , is 1-5 D. The, , likely, , converted, , o, , a, , 251. The dipole moment of, , b r o m i n e ., , and, , C, , hydrogen, , (B) 2.5, , A, , Hhachof, , is, , are, , paramagnetic., , (Kerala P.E.T. 2010), .Which of the following, , statement, , is false, , (A) H molecule has one sigma bond, B) HCI molecule has one sigma bond, , CWater molecule has three sigma bonds and, wo lone pairs, , D) Ethylene molecule has five sigma bond and, ORe pi bond., , E) Acerylene molecule has three sigma bond, and three, sigma bonds. (Kerala P.E.T. 2010), , same as that present in the other three ?, , (A) PCl, , (B) SF, , C)5, , D) SbCi, , (4.1.P.M.T. Prelim. 2010), 253. Which of the following conversion involves, change in both hybridization and shape?, , (A) CH, (C) BF, , CH6, BF, , (B) NH3, , NH, , (D) H,0, , H,O, , (Karmataka C.E.T. 2010, increasing bond angle in, the following species is, , 254. The correct order of, , (A) C10 < Ci0 < CIO, , (B) Clho< CI02 < CIO, , A, , Answers, , A) 243. (C) 244. (A) 245. (B) 246. (D), , 32(D), , 253. (C) 254., A), , 247 (E) 248. (D) 249. (A) 250. (C) 251. (A)