front 1 According to valence bond theory, which orbitals overlap in the formation of the bond in Cl2? 4p on Cl and 4p on Cl 3p on Cl and 3p on Cl sp on Cl and sp on Cl 3s on Cl and 3s on Cl 2p on Cl and 2p on Cl | back 1 Answer: 3p on Cl and 3p on Cl |
front 2 The molecular geometry of the IF5 molecule is ________, and this molecule is ________. trigonal bipyramidal, polar trigonal bipyramidal, nonpolar trigonal planar, polar square pyramidal, polar square pyramidal, nonpolar | back 2 Answer: square pyramidal, polar |
front 3 For molecules with only one central atom, how many lone pairs on the central atom guarantees molecular polarity? 1 2 1 or 2 3 1 or 3 | back 3 Answer: 1 |
front 4 ClF3 has ""T-shaped"" geometry. There is/are ________ non-bonding domain(s) in this molecule. 4 2 3 1 0 | back 4 Answer: 2 |
front 5 Molecular Orbital theory correctly predicts diamagnetism of fluorine gas, F2. This is because ________. the bond order in F2 can be shown to be equal to 1. there are more electrons in the bonding orbitals than in the antibonding orbitals. all electrons in the MO electron configuration of F2 are paired. the energy of the π2pMOs is higher than that of the σ2p MO. the F—F bond enthalpy is very low. | back 5 Answer: all electrons in the MO electron configuration of F2 are paired. |
front 6 The hybridizations of bromine in BrF5 and of arsenic in AsF5 are ________ and ________, respectively. sp3, sp3dsp3d, sp3d2sp3d, sp3 sp3d2, sp3d2, sp3d sp3dsp3d2, sp3d2 | back 6 Answer: sp3d2, sp3d |
front 7 The hybrid orbital set used by the central atom in SO3 is ________. sp sp2 sp3 sp3d sp3d2 | back 7 Answer: sp2 |
front 8 The electron-domain geometry and molecular geometry of the nitrite ion are ________ and ________, respectively. trigonal bipyramidal, trigonal planar tetrahedral, trigonal pyramidal trigonal bipyramidal,T-shaped trigonal planar, bent T-shaped, trigonal planar | back 8 Answer: trigonal planar, bent |
front 9 ________ hybrid orbitals are used for bonding by Xe in the XeF4 molecule. sp2 sp3 sp3d sp3d2 sp | back 9 Answer: sp3d2 |
front 10 n a typical multiple bond, the σ bond results from overlap of ________ orbitals and the π bond(s) result from overlap of ________ orbitals. hybrid, atomic hybrid, hybrid atomic, hybrid hybrid, hybrid or atomic hybrid or atomic, hybrid or atomic | back 10 Answer: hybrid, atomic |
front 11 Of the molecules below, only ________ is nonpolar. PF3 Br2S TeCl2 HCl BeH2 | back 11 Answer: BeH2 |
front 12 Based on molecular orbital theory, the bond order of the H—H bond in the H2+ ion is ________. 0 1/2 1 3/2 2 | back 12 Answer: 1/2 |
front 13 Based on molecular orbital theory, the only molecule in the list below that has unpaired electrons is ________. C2 N2 F2 O2 Li2 | back 13 Answer: O2 |
front 14 n comparing the same two atoms bonded together, the ________ the bond order, the ________ the bond length, and the ________ the bond energy. smaller, longer, smaller greater, greater, greater greater, longer, greater greater, shorter, smaller smaller, greater, greater | back 14 Answer: smaller, longer, smaller |
front 15 According to valence bond theory, which orbitals overlap in the formation of the bond in Br2? 3s 3p 4s 4p 3d | back 15 Answer: 4p |
front 16 The N-N bond in HNNH consists of ________. one σ bond and one π bond one σ bond and two π bonds two σ bonds and one π bond two σ bonds and two π bonds one σ bond and no π bonds | back 16 Answer: one σ bond and one π bond |
front 17 In counting the electron domains around the central atom in VSEPR theory, a ________ is not included. nonbonding pair of electrons single covalent bond core level electron pair double covalent bond triple covalent bond | back 17 Answer: core level electron pair |
front 18 he electron-domain geometry and molecular geometry of iodine trichloride are ________ and ________, respectively. trigonal bipyramidal, trigonal planar tetrahedral, trigonal pyramidal trigonal bipyramidal, T-shaped octahedral, trigonal planar T-shaped, trigonal planar | back 18 Answer: trigonal bipyramidal, T-shaped |
front 19 The angles between sp2 orbitals are ________. 45° 180° 90° 109.5° 120° | back 19 Answer: 120° |
front 20 There are ________ σ bonds and ________ π bonds in H3C–CH2–CH=CH–CH2–C≡CH. 14, 2 10, 3 12, 2 13, 2 16, 3 | back 20 Answer: 16, 3 |
front 21 According to valence bond theory, which orbitals overlap in the formation of the bond in Br2? 3s 3p 4s 4p 3d | back 21 Answer: 4p |
front 22 Based on molecular orbital theory, the bond orders of the H—H bonds in H2, H2+, and H2- are ________, respectively 1, 0, and 0 1, 1/2, and 0 1, 0, and 1/2 1, 1/2, and 1/2 1, 2, and 0 | back 22 Answer: 1, 1/2, and 1/2 |
front 23 Of the molecules below, only ________ is nonpolar. PF3 Br2S TeCl2 HCl BeH2 | back 23 Answer: BeH2 |
front 24 For a molecule with the formula AB2, the molecular shape is ________. linear or bent linear or trigonal planar linear or T-shaped T-shaped trigonal planar | back 24 Answer: linear or bent |
front 25 The molecular geometry of the CS2 molecule is ________. linear bent tetrahedral trigonal planar T-shaped | back 25 Answer: linear |
front 26 A typical double bond ________. is stronger and shorter than a single bond consists of one σ bond and one π bond imparts rigidity to a molecule consists of two shared electron pairs All of the above answers are correct. | back 26 Answer: All of the above answers are correct. |
front 27 When three atomic orbitals are mixed to form hybrid orbitals, how many hybrid orbitals are formed? six four five three one | back 27 Answer: three |
front 28 The hybrid orbitals used for bonding by Xe in the unstable XeF2 molecule are ________ orbitals. sp2 sp3 sp3d sp3d2 sp | back 28 Answer: sp3d |
front 29 An antibonding π orbital contains a maximum of ________ electrons. 1 2 4 6 8 | back 29 Answer: 2 |
front 30 An antibonding MO ________ the corresponding bonding MO. is always lower in energy than can accommodate more electrons than can accommodate fewer electrons than is always higher in energy than is always degenerate with | back 30 Answer: is always higher in energy than |
front 31 ClF3 has ""T-shaped"" geometry. There is/are ________ non-bonding domain(s) in this molecule. 4 2 3 1 0 | back 31 Answer: 2 |
front 32 In order to exhibit delocalized π bonding, a molecule must have ________. at least two π bonds at least two resonance structures at least three σ bonds at least four atoms trigonal planar electron domain geometry | back 32 Answer: at least two resonance structures |
front 33 According to MO theory, overlap of two p atomic orbitals produces ________. two bonding molecular orbitals one bonding molecular orbital and one antibonding molecular orbital two bonding molecular orbitals and two antibonding molecular orbitals two bonding molecular orbitals and one antibonding molecular orbital three bonding molecular orbitals and three antibonding molecular orbitals | back 33 Answer: one bonding molecular orbital and one antibonding molecular orbital |
front 34 The central atom in a certain molecule has 2 nonbonded electron pairs and 4 bonded electron pairs in its valence shell. The molecular geometry of this molecule is ________. seesaw square planar linear trigonal bipyramidal T-shaped | back 34 Answer: square planar |
front 35 The electron-domain geometry of a sulfur-centered compound is trigonal bipyramidal. The hybridization of the central sulfur atom is ________. sp sp2 sp3 sp3d sp3d2 | back 35 Answer: sp3d |
front 36 According to valence bond theory, which orbitals overlap in the formation of the bond in Cl2? 4p on Cl and 4p on Cl 3p on Cl and 3p on Cl sp on Cl and sp on Cl 3s on Cl and 3s on Cl 2p on Cl and 2p on Cl | back 36 Answer: 3p on Cl and 3p on Cl |
front 37 he blending of one s atomic orbital and one p atomic orbital produces ________. two sp hybrid orbitals two sp2 hybrid orbitals two sp3 hybrid orbitals three sp hybrid orbitals three sp2 hybrid orbitals | back 37 Answer: two sp hybrid orbitals |
front 38 The electron-domain geometry of ________ is tetrahedral. CBr4 PH3 CCl2 Br2 Xe F4 all of the above except XeF4 | back 38 Answer: all of the above except XeF4 |
front 39 The molecular geometry of the BeCl2 molecule is ________, and this molecule is ________. bent, nonpolar linear, polar bent, polar seesaw, polar linear, nonpolar | back 39 Answer: linear, nonpolar |
front 40 n order to produce sp2 hybrid orbitals, ________ s atomic orbital(s) and ________ p atomic orbital(s) must be mixed. one, two one, three one, one two, two two, three | back 40 Answer: one, two |
front 41 The electron-domain geometry and the molecular geometry of a molecule of the general formula ABn are ________. never the same always the same sometimes the same not related mirror images of one another | back 41 Answer: sometimes the same |
front 42 For a molecule with the formula AB2, the molecular shape is ________. linear or bent linear or trigonal planar linear or T-shaped T-shaped trigonal planar | back 42 Answer: linear or bent |
front 43 Which of the following molecules or ions will exhibit delocalized bonding? NO2- NH4+ N3- NH4+ and N3- NO2- only NO2-, NH4+, and N3- N3- only NO2- and N3- | back 43 Answer: NO2- only |
front 44 The hybridizations of nitrogen in NF3 and NH3 are ________ and ________, respectively. sp2, sp2 sp, sp3 sp3, sp sp3, sp3 sp2, sp3 | back 44 Answer: sp3, sp3 |
front 45 he electron domain and molecular geometry of SO3 are ________. trigonal bipyramidal, trigonal planar trigonal planar, bent trigonal bipyramidal, T-shaped trigonal planar, trigonal planar octahedral, seesaw | back 45 Answer: trigonal planar, trigonal planar |
front 46 The central Xe atom in the XeF4 molecule has ________ unbonded electron pair(s) and ________ bonded electron pair(s) in its valence shell. 1, 4 2, 4 4, 0 4, 1 4, 2 | back 46 Answer: 2, 4 |
front 47 The more effectively two atomic orbitals overlap, ________. the more bonding MOs will be produced by the combination the higher will be the energy of the resulting bonding MO and the lower will be the energy of the resulting antibonding MO the higher will be the energies of both bonding and antibonding MOs that result the fewer antibonding MOs will be produced by the combination the lower will be the energy of the resulting bonding MO and the higher will be the energy of the resulting antibonding MO | back 47 Answer: the lower will be the energy of the resulting bonding MO and the higher will be the energy of the resulting antibonding MO |
front 48 Using the VSEPR model, the electron-domain geometry of the central atom in ClF3 is ________. linear trigonal planar tetrahedral trigonal bipyramidal octahedral | back 48 Answer: trigonal bipyramidal |
front 49 he hybridization of the carbon atom in carbon dioxide is ________. sp sp2 sp3 sp3d sp3d2 | back 49 Answer: sp |
front 50 Of the following species, ________ will have bond angles of 120°. PH3 ClF3 NCl3 BCl3 All of these will have bond angles of 120°. | back 50 Answer: BCl3 |
front 51 he hybridization scheme for BeF2 is ________. sp sp2 sp3 sp3d sp3d2 | back 51 Answer: sp |
front 52 Using the VSEPR model, the molecular geometry of the central atom in PCl3 is ________. linear trigonal planar tetrahedral bent trigonal pyramidal | back 52 Answer: trigonal pyramidal |
front 53 PCl5 has ________ electron domains and a ________ molecular arrangement. 6, trigonal bipyramidal 6, tetrahedral 5, square pyramidal 5, trigonal bipyramidal 6, seesaw | back 53 Answer: 5, trigonal bipyramidal |
front 54 The hybridization of carbon in the H—C ≡ N: molecule is ________. sp2 s2p s3p sp sp3 | back 54 Answer: sp |
front 55 n comparing the same two atoms bonded together, the ________ the bond order, the ________ the bond length, and the ________ the bond energy. smaller, longer, smaller greater, greater, greater greater, longer, greater greater, shorter, smaller smaller, greater, greater | back 55 Answer: smaller, longer, smaller |
front 56 Of the following molecules, only ________ is polar. BeCl2 BF3 CBr4 SiH2Cl2 Cl2 | back 56 Answer: SiH2Cl2 |
front 57 In order to exhibit delocalized π bonding, a molecule must have ________. at least two π bonds at least two resonance structures at least three σ bonds at least four atoms trigonal planar electron domain geometry | back 57 Answer: at least two resonance structures |
front 58 The bond order of a homonuclear diatomic molecule can be decreased by ________. removing electrons from a bonding MO or adding electrons to an antibonding MO adding electrons to a bonding MO or removing electrons from an antibonding MO adding electrons to any MO removing electrons from any MO The bond order of a homonuclear diatomic molecule cannot be decreased by any means. | back 58 Answer: removing electrons from a bonding MO or adding electrons to an antibonding MO |
front 59 For molecules with only one central atom, how many lone pairs on the central atom guarantees molecular polarity? 1 2 1 or 2 3 1 or 3 | back 59 Answer: 1 |
front 60 f the following, the central atom is sp3d2 hybridized only in ________. PCl5 XeF4 PH3 Br3- BeF2 | back 60 Answer: XeF4 |
front 61 The electron-domain geometry and the molecular geometry of a molecule of the general formula ABn will always be the same if ________. there are no lone pairs on the central atom there is more than one central atom n is greater than four n is less than four the octet rule is obeyed | back 61 Answer: there are no lone pairs on the central atom |
front 62 The more effectively two atomic orbitals overlap, ________. the more bonding MOs will be produced by the combination the higher will be the energy of the resulting bonding MO and the lower will be the energy of the resulting antibonding MO the higher will be the energies of both bonding and antibonding MOs that result the fewer antibonding MOs will be produced by the combination the lower will be the energy of the resulting bonding MO and the higher will be the energy of the resulting antibonding MO | back 62 Answer: the lower will be the energy of the resulting bonding MO and the higher will be the energy of the resulting antibonding MO |
front 63 according to valence bond theory, which orbitals overlap in the formation of the bond in HCl? 1s on H and 2p on Cl 2s on H and 3p on Cl 1s on H and 3s on Cl 1s on H and 3p on Cl 1s on H and 4p on Cl | back 63 Answer: 1s on H and 3p on Cl |
front 64 In a typical multiple bond, the σ bond results from overlap of ________ orbitals and the π bond(s) result from overlap of ________ orbitals. hybrid, atomic hybrid, hybrid atomic, hybrid hybrid, hybrid or atomic hybrid or atomic, hybrid or atomic | back 64 Answer: hybrid, atomic |
front 65 Of the following molecules, only ________ is polar. CCl4 BCl3 NCl3 BeCl2 Cl2 | back 65 Answer: NCl3 |
front 66 The hybrid orbitals used for bonding by the sulfur atom in the SF4 molecule are ________ orbitals. sp sp2 sp3 sp3d sp3d2 | back 66 Answer: sp3d |
front 67 A molecular orbital can accommodate a maximum of ________ electron(s). 1 2 4 6 12 | back 67 Answer: 2 |
front 68 Using the VSEPR model, the molecular geometry of the central atom in CH4 is ________. linear trigonal planar tetrahedral bent trigonal pyramidal | back 68 Answer: tetrahedral |
front 69 Based on molecular orbital theory, the bond order of the Be Be bond in the Be2 molecule is ________. 0 1 2 3 4 | back 69 Answer: 0 |
front 70 The more effectively two atomic orbitals overlap, ________. the more bonding MOs will be produced by the combination the higher will be the energy of the resulting bonding MO and the lower will be the energy of the resulting antibonding MO the higher will be the energies of both bonding and antibonding MOs that result the fewer antibonding MOs will be produced by the combination the lower will be the energy of the resulting bonding MO and the higher will be the energy of the resulting antibonding MO | back 70 Answer: the lower will be the energy of the resulting bonding MO and the higher will be the energy of the resulting antibonding MO |
front 71 In comparing the same two atoms bonded together, the ________ the bond order, the ________ the bond length, and the ________ the bond energy. smaller, longer, smaller greater, greater, greater greater, longer, greater greater, shorter, smaller smaller, greater, greater | back 71 Answer: smaller, longer, smaller |
front 72 ________ hybrid orbitals are used for bonding by Xe in the XeF4 molecule. sp2 sp3 sp3d sp3d2 sp | back 72 Answer: sp3d2 |
front 73 The Lewis structure of carbon monoxide is given below. The hybridizations of the carbon and oxygen atoms in carbon monoxide are ________ and ________, respectively. : C ≡ O : sp, sp3 sp2, sp3 sp3, sp2 sp, sp sp2, sp2 | back 73 Answer: sp, sp |
front 74 According to MO theory, overlap of two s atomic orbitals produces ________. one bonding molecular orbital and one hybrid orbital two bonding molecular orbitals two bonding molecular orbitals and two antibonding molecular orbitals two bonding molecular orbitals and one antibonding molecular orbital one bonding molecular orbital and one antibonding molecular orbital | back 74 Answer: one bonding molecular orbital and one antibonding molecular orbital |
front 75 The carbon-carbon σ bond in ethylene, H2C=CH2, results from the overlap of ________. sp hybrid orbitals sp3 hybrid orbitals sp2 hybrid orbitals s atomic orbitals p atomic orbitals | back 75 Answer: sp2 hybrid orbitals |
front 76 Using the VSEPR model, the electron-domain geometry of the central atom in O3 is ________. linear trigonal planar tetrahedral trigonal bipyramidal octahedral | back 76 Answer: trigonal planar |
front 77 The molecular geometry of ________ is square planar. CCl4 XeF4 PH3 XeF2 ICl3 | back 77 Answer: XeF4 |
front 78 Of the molecules below, only ________ is polar. CO2 CH4 PF5 SnF3 H2 | back 78 Answer: SnF3 |
front 79 The Cl-Si-Cl bond angle in the SiCl2F2 molecule is approximately ________. 90° 109.5° 120° 180° 60° | back 79 Answer: 109.5° |
front 80 A typical triple bond ________. consists of one σ bond and two π bonds consists of three shared electrons consists of two σ bonds and one π bond consists of six shared electron pairs is longer than a single bond | back 80 Answer: consists of one σ bond and two π bonds |
front 81 There is/are ________ hybridized s atomic orbital(s) in an sp-hybridized carbon atom. 4 0 3 1 2 | back 81 Answer: 1 |
front 82 A triatomic molecule cannot be linear if the hybridization of the central atoms is ________. sp sp2 sp3 sp2 or sp3 sp2d or sp3d2 | back 82 Answer: sp2 or sp3 |
front 83 A typical double bond consists of ________. three sigma bonds three pi bonds one sigma and two pi bonds one sigma and one pi bond three ionic bonds | back 83 Answer: one sigma and one pi bond |
front 84 The electron-domain geometry and the molecular geometry of a molecule of the general formula ABn will always be the same if ________. there are no lone pairs on the central atom there is more than one central atom n is greater than four n is less than four the octet rule is obeyed | back 84 Answer: there are no lone pairs on the central atom |
front 85 The molecular geometry of the CHF3 molecule is ________, and the molecule is ________. trigonal pyramidal, polar tetrahedral, nonpolar seesaw, nonpolar tetrahedral, polar seesaw, polar | back 85 Answer: tetrahedral, polar |
front 86 The bond angles in a tetrahedral molecule are ________ degrees. 109.5 120 90 45 <45 | back 86 Answer: 109.5 |
front 87 The molecular geometry of the PHCl2 molecule is ________. bent trigonal planar trigonal pyramidal tetrahedral T-shaped | back 87 Answer: trigonal pyramidal |
front 88 A triatomic molecule cannot be linear if the hybridization of the central atoms is ________. sp sp2 sp3 sp2 or sp3 sp2d or sp3d2 | back 88 Answer: sp2 or sp3 |
front 89 The F-N-F bond angle in the NF3 molecule is slightly less than ________. 90° 109.5° 120° 180° 60° | back 89 Answer: 109.5° |
front 90 There is/are ________ hybridized s atomic orbital(s) in an sp-hybridized carbon atom. 4 0 3 1 2 | back 90 Answer: 1 |
front 91 The hybrid orbitals used for bonding by the sulfur atom in the SF4 molecule are ________ orbitals. sp sp2 sp3 sp3d sp3d2 | back 91 Answer: sp3d |
front 92 The molecular geometry of the BeCl2 molecule is ________, and this molecule is ________. bent, nonpolar linear, polar bent, polar seesaw, polar linear, nonpolar | back 92 Answer: linear, nonpolar |
front 93 Of the following molecules, only ________ is polar. BeCl2 BF3 CBr4 SiH2Cl2 Cl2 | back 93 Answer: SiH2Cl2 |
front 94 The F-B-F bond angle in the BF3 molecule is ________. 90° 109.5° 120° 180° 60° | back 94 Answer: 120° |
front 95 In order to produce sp2 hybrid orbitals, ________ s atomic orbital(s) and ________ p atomic orbital(s) must be mixed. one, two one, three one, one two, two two, three | back 95 Answer: one, two |