" (a) LiF (b) Li O(c) Li N (d) All2 3 same3. The correct order of the increasing ionic character is- (a) BeCl < MgCl < CaCl < BaCl (b) BeCl < MgCl < BaCl <2 2 2 2 2 2 2 CaCl2 (c) BeCl < BaCL < MgCl < CaCl (d) BaCl < MgCl < CaCl <2 2 2 2 2 2 2 BeCl2 + – 4. An ionic bond A B is most likely to be formed when : (a) the ionization energy of A is high and the electron affinity of B is low (b) the ionization energy of A is high and the electron affinity of B is low(c) the ionization energy of A and the electron affinity of B is high (d) the ionization energy of A and the electron affinity of B is low5. Which of the following compounds of elements in group IV is expected to themost ionic? (a) PbCl (b) PbCl(c) CCl (d)2 4 4 SiCl4 6. The molecule BF borth are covalent compounds. But BF, is non,polar and NF is3 3 polar. The reason is that- (a) boron is a metal and nitrogen is a gas in uncombined state (b) B – F bond have no dipole moment whereas N – F bond have dipole moment(c) atomic size of boron is smaller than that of nitrogen (d) BF is symmetrical molecule where as NF is unsymmetrical3 3 7. Least melting point is shown by the compound- (a) PbCl (b) SnCl(c) NaCl (d)2 4 AlCl3 8. Which of the following is in rder of increasing covalent character? (a) CCl < BeCl < BCl < LiCl (b) LiCl < CCl < BeCl < BCl4 2 3 4 2 3 (c) LiCl < BeCl < BCl < CCl (d) LiCl < BeCl < CCl < BCl2 3 4 2 4 3 9. Which of the following compounds contain/s both ionic and covalent bonds? (a) NH Cl (b) KCN(c) CuSO .5H O (d)4 4 2 NaOH10. The tyes of bonds present in CuSO .5H O are4 2(a) electrovalent and covalent (b) electrovalent and coordinate(c) covalent and coordinate (d) electrovalent, covalent andcoordinate11. Three centre-two electron bonds exist in : (a) B H (b) Al2(CH )(c) BeH (s) (d)2 6 3 6 2 BeCl (s)2 Octet Rule :12. Example of super octet molecule is : (a) SF (b) PCl(c) IF (d) All6 5 7 of these13. To which of the following species octet rule is not applicable : (a) BrF (b) SF(c) IF (d) CO5 6 7 14. NH and BF combine readily because of the formation of :3 3(a) a covalent bond (b) hydrogen bond(c) acoordinate bond (d) anionic bond 41 15. Which of the following species cotain covalent and ccordincate bond.4– –(a) AlCl (b) CO(c) [Fe(CN) ] (d) N3 6 3 FAJANS RULE16. Which of the following combination of ion will have highest polarisation2+ – 4+ – 2+ –(a) Fe , Br (b) Ni , Br(c) Ni , Br (d) Fe,– Br17. Which of the following cannot be explained on the basis of Fajan‘s Rules. (a) Ag S is much less soluble than Ag O2 2(b) Fe(OH) is much less soluble than Fe(OH)3 2 (c) BaCO is much less soluble than MgCO3 3(d) Melting point of AlCl is much less than that of NaCl3 18. The correct order of decreasing polarizability of ion is :– – – – – – – – – – – – –(a) Cr , Br , I , F (b) F , I , Br , Cl(c) I , Br , Cl , F (d) F ,– – – Cl , Br , I19. Which ion has a higher polarising power2+ 3+ 2+ +(a) Mg (b) Al(c) Ca (d) Na20. Which combination will show maxinum polarising power & maxinum polarisability2+ – 7+ – 2+ –(a) Mn .F (b) Mn , I(c) Mn , I (d)7+ – Mn , FLEWIS STRUCTURE :21. The possible structure (s) of monothiocarbonate ion is : (a)(b) (c)(d) 22. Pick out among the following species isoelectronic with CO .2 – – 2– –(a) N (b) (CNO)(c) (NCN) (d) NO 3 2 V.B.T. & HYBRIDISATION :23. The strength of bonds by s – s, p – p, s – p overlap is in the order : (a) s – s < s – o < p – p(b) s – s < p – p < s – p(c) s – p < s – s < p – p(d) p – p < s – s < s – p.24. Number and ype of bonds between two carbon stoms in CaC are :2(a) one sigm3 ( ?) and one pi ( ?) bond (b) one ? and two ? bonds(c) one ? and one and a half ? bond (d) one ? bond25. In the context of carbon, which of the follwoing is arranged in the correct order ofelectronegativity:2 3 3 2 2 3 3(a) sp > sp > sp (b) sp > sp > sp(c) sp > sp > sp (d) sp2 > sp > sp26. Which of the following oxyacids of sulphur contain =S – S bonds? (a) H S O (b) H S O(c) H S O (d)2 2 8 2 2 6 2 2 4 H S O2 2 5 2 2 27. Which of the following represent the given mode of hybridisation sp – sp – sp –sp from left to right 42(a) H C = C = c = CH(b) HC ? C – C? CH 2 2(c) H C = CH – C? N(d) H C = CH – C? CH2 2 28. For BF molecule which of the following is true.3 2(a) B-atom is sp hybridised (b) There is a P ? –P ? back bonding in this molecule(c) Observed B–F bond length is found to be less than the expected bond length. (d) All of these29. Which of the following is isoelectronic as well as isostructura‘ with N O2(a) N H (b) H O(c) NO (d) CO3 2 2 2 30. The hybridization state of B in B H is –2 6 2 3(a) sp (b) sp(c) sp (d)3 sp d31. What is not true for SiH molecule –4 (a) Tetrahedral hybridisation (b) 109º angle(c) 4? bond(d) 4-lone pair of electrons32. Which of the following has a geometry different from the other three species(having the same geometry)? (a)(b) (c) XeF (d) 4 33. In C – C bond C2H6 undergoes heterolytic fission, the hybridisation of tworesulting carbon atoms is/are2 3 2 3(a) sp both (b) sp both(c) sp , sp (d) sp,2 sp34. Which of the following statements are not correct? (a) Hybridization is the mixing of atomic orbitals of large energy difference.2(b) sp – hybrid orbitals are formed form two p – atomic orbitals and one s-atomicorbitals2 (c) dsp – hybrid orbitals are all at 90º to one another2 3(d) d sp – hybrid orbitals are directed towards the corners of a regularoctahedron35. p ? – d ? back bonding occurs between oxygen and (a) phosphorus in P O(b) chlorine in HClO 4 10 4(c) nitrogen in N O(d) carbon in CO2 5 2 36. In which of the following groups all the the members have linear shape+ – – –(a) NO , N , H – C – H(b) N , I , H – C – H2 3 3 3 (c) XeF , C2H , SO(d) CO , BeCl , SnCl2 2 2 2 2 2 37. Consider the following molecules : H OH S H SeH Te2 2 2 2IIIIIIIV Arrange these molecules in increasing order of bond angles. (a) I < II < III < IV (b) IV < III < II < I(c) I < II < IV < III (d) II <IV < III < I38. Which has the smallest bond angle (X – O – X) in the given molecules? (a) OSF (b) OSCl(c) OSBr (d)2 2 2 OSI2 39. Consider the following iodides : PIAsISbI3 3 3102º100.2º 99º The bond angle is maximum in Pl , which is343(a) due to small size of phosphorus (b) due to more bp–bp repulsionin PI 3(c) due to less electronegativity of P (d) none of theseBONDS ANGLES & BOND LENGTH :40. The correct order of increasing X – O – X bond angle is (X = H, F or Cl): (a) H O > Cl > F O(b) Cl O > H O > F O2 2 2 2 2 2 (c) F O > Cl O > H O(d) F O > H O > Cl O2 2 2 2 2 2 41. Which of the following compounds have bond angle as nearly 90º? (a) NH (b) H S(c) H O (d) SF3 2 2 6 42. Number of non bonding electrons in N is :2(a) 4 (b) 10(c) 12 (d) 1443. Which of the following species is paramagnetic ?– –(a) NO (b) (c) CN (d) CO44. Tho bond order depends on the number of electrons in the bonding and nonbonding orbitals. Which of the following statements is/are correct about bondorder? (a) Bond order cannot have a negative value (b) It always has an integral value(c) It is a nonzero quantity (d) It can assume any value-positive or negative, integral or fractional, includingzero45. In the formation offrom N , the electron is removed from :2(a) ? orbital (b) ? orbital(c) ?* orbital (d) ?*orbital46. Which of the following has fractional bond order : (a)(b) (c)(d) 47. How many unpaired electrons are present in: (a) 1 (b) 2(c) 3 (d) 448. Which of the following have identical bond order? (a)(b) (c) NO (d) 49. Which of the following have identical bond order?+ – +(a)(b) NO(c) CN (d) CN– + 50. Given the species : N , CO, CN and NO , Which of the following statements are2 true for these (a) All species are paramagnetic (b) The species areisoelectronic(c) All the species have dipole moment (d) All the species are linear51. Which of the following are paramangetic? (a) B (b) O(c) N (d) He2 2 2 2 52. Which of the following species have a bond order of 3?– +(a) CO (b) CN(c) NO (d) 53. Which of the following pairs have identical values of bond order? (a)and(b) F and Ne(c) O and B (d) C2 2 2 2 2 and N2 54. Find out the bond order of : (a) H (b) (c) He (d) Li 2 2 2(f) B244 55. The correct order of boiling point is : (a) H O < H S < H Se < H Te (b) H O > H Se > H Te > H S2 2 2 2 2 2 2 2 (c) H O > H S > H Se > H Te (d) H O > H Te > H Se > H S2 2 2 2 2 2 2 2 56. Which of the following models best describes the bonding within a layer of thegraphite structure? (a) metallic bonding(b) ionic bonding(c) non-metallic covalent bonding (d) van der Waals forces57. The critical temperature of water is higher than that of O because the H O2 2 molecule has : (a) fewer electrons than O (b) two covalet bonds2 (c) V - shape(d) dipole moment58. Arrange the following in order of decreasing boiling point : (I) n-Butane (II) n-Butanol (III) n-Butyl chloride (IV)Isobutane (a) IV > III > II > I (b) IV > II > III > I(c) I > II > III > IV (d) II >III > I > IV59. For H O , H S, H O and HF, the correct order of increasing extent of hydrogen2 2 2 2 bonding is : (a) H O > HF > H O > H S (b) H O > HF > H S > H O2 2 2 2 2 2 2 2 (c) HF > H O > H O > H S (d) H O > H O > HF > H S2 2 2 2 2 2 2 2 60. Which one of the following does not have intermolecular H-bonding? (a) H O (b) o-nitro phenol(c) HF (d)2 CH COOH3 61.(a) has intermolecular H - bonding (b) has intramolecular H- bonding(c) has low boilng point(d) is steam-volatile62. Which of the following is/are observed in metallic bonds? (a) Mobile valence electrons (b) Overlapping valence orbitals(c) Highly directed bond(d) Delocalized electrons63. Intermolecular hydrogen bonding increases the enthalpy of vapourization of aliquid due to the(a) decrease in the attraction betwwen molecules (b) increase in the attraction between molecules(c) decrease in the molar mass of unassociated liquid molecules (d) increase in the effective molar mass of hydrogen - bonded molecules64. Of the following molecules, the one, which has permanent diple moment, is- (a) SiF (b) BF(c) PF (d) PF4 3 3 5 65. The dipole moments of the given molecules are such that- (a) BF > NF > NH (b) NF > BF > NH(c) NH > NF > BF (d) NH3 3 3 3 3 3 3 3 3 3 > BF > NF3 3 66. Which of the following has the least dipole moment (a) NF (b) CO(c) SO (d) NH3 2 2 3 67. Which of the following compounds possesses zero dipole moment? (a) Water(b) Benzene(c) Carbon tetrachloride(d) Boron trifluoride"