Chemistry Chapter 9 Quiz

Consider the following species when answering the following questions: (i) BCl3 (ii) CCl4 (iii) TeCl4 (iv) XeF4 (v) SF6 28) In which of the molecules is the central atom sp2 hybridized? A) (i) only B) (i) and (ii) C) (iii) and (iv) D) (iii) only E) (iv) and (v)

A) (i) only

In comparing the same two atoms bonded together, the ________ the bond order, the ________ the bond length, and the ________ the bond energy. A) greater, shorter, greater B) greater, greater, greater C) greater, longer, greater D) smaller, longer, smaller E) smaller, greater, greater

A) greater, shorter, greater

The hybridization of nitrogen in the H—C N: molecule is ________. A) sp B) s2p C) s3p D) sp2 E) sp3

A) sp

The hybridization scheme for BeF2 is ________. A) sp B) sp2 C) sp3 D) sp3d E) sp3d2

A) sp

In a C=C bond, the σ bond results from overlap of ________ orbitals and the π bond(s) result from overlap of ________ orbitals. A) sp2-hybrid, p-atomic B) sp2-atomic, p-hybrid C) sp3-hybrid, p-atomic D) sp-hybrid, p-atomic E)term-29 σ-atomic, π-hybrid

A) sp2-hybrid, p-atomic

The electron-domain geometry and the molecular geometry of a molecule of the general formula ABn will always be the same if ________. A) there are no lone pairs on the central atom B) there is more than one central atom C) n is greater than four D) n is less than four E) the octet rule is obeyed

A) there are no lone pairs on the central atom

) The molecular geometry of the right-most carbon in the molecule below is ________. A) trigonal planar B) trigonal bipyramidal C) tetrahedral D) octahedral E) T-shaped

A) trigonal planar

The molecular geometry of the BrO3- ion is ________. A) trigonal pyramidal B) trigonal planar C) bent D) tetrahedral E) T-shaped

A) trigonal pyramidal

The central Xe atom in the XeF4 molecule has ________ unbonded electron pair(s) and ________ bonded electron pair(s) in its valence shell. A) 1, 4 B) 2, 4 C) 4, 0 D) 4, 1 E) 4, 2

B) 2, 4

Which of the following molecules or ions will exhibit delocalized bonding? NO2- NH4+ N3- A) NH4+ and N3- B) NO2- only C) NO2-, NH4+, and N3- D) N3- only E) NO2- and N3-

B) NO2- only

Three monosulfur fluorides are observed: SF2, SF4, and SF6. Of these, ________ is/are polar. A) SF2 only B) SF2 and SF4 only C) SF4 only D) SF6 only E) SF2, SF4, and SF6

B) SF2 and SF4 only

Of the following, the central atom is sp3d2 hybridized only in ________. A) PCl5 B) XeF4 C) PH3 D) Br3- E) BeF2

B) XeF4

The N-H bond in ammonia consists of ________. A) one σ bond and one π bond B) one σ bond and no π bonds C) one σ bond and two π bonds D) two σ bonds and one π bond E) two σ bonds and two π bonds

B) one σ bond and no π bonds

The hybridization of carbon in the H-C C-H molecule is ________. A) sp2 B) sp C) s2p D) s3p E) sp3

B) sp

The hybridization of the oxygen atom labeled x in the structure below is ________. A) sp B) sp2 C) sp3 D) sp3d E) sp3d2

B) sp2

The hybridization of the terminal carbons in the H2C C CH2 molecule is ________. A) sp B) sp2 C) sp3 D) sp3d E) sp3d2

B) sp2

) The hybridizations of iodine in IF3 and IF5 are ________ and ________, respectively. A) sp3, sp3d B) sp3d, sp3d2 C) sp3d, sp3 D) sp3d2, sp3d E) sp3d2, sp3d2

B) sp3d, sp3d2

Consider the following species when answering the following questions: (i) BCl3 (ii) CCl4 (iii) TeCl4 (iv) XeF4 (v) SF6 18) Which of the molecules has a see-saw shape? A) (i) B) (ii) C) (iii) D) (iv) E) (v)

C) (iii)

) Which of the following molecules or ions have various resonance structures? CO2 O3 CO32- A) CO2, O3, and CO32- B) CO2 and O3 C) O3 and CO32- D) CO32- only E) None of the above will exhibit delocalized bonding.

C) O3 and CO32-

Of the molecules below, only ________ is polar. A) CCl4 B) CH4 C) SeF4 D) SiCl4

C) SeF4

In counting the electron domains around the central atom in VSEPR theory, a ________ is not included. A) nonbonding pair of electrons B) single covalent bond C) core level electron pair D) double covalent bond E) triple covalent bond

C) core level electron pair

The molecular geometry of the left-most carbon atom in the molecule below is ________. A) trigonal planar B) trigonal bipyramidal C) tetrahedral D) octahedral E) T-shaped

C) tetrahedral

The molecular geometry of the PF3 molecule is ________, and this molecule is ________. A) trigonal planar, polar B) trigonal planar, nonpolar C) trigonal pyramidal, polar D) trigonal pyramidal, nonpolar E) tetrahedral, unipolar

C) trigonal pyramidal, polar

) Based on molecular orbital theory, the bond orders of the H—H bonds in H2, H2+, and H2- are ________, respectively A) 1, 0, and 0 B) 1, 1/2, and 0 C) 1, 0, and 1/2 D) 1, 1/2, and 1/2 E) 1, 2, and 0

D) 1, 1/2, and 1/2

The bond angles marked a, b, and c in the molecule below are about ________, ________, and ________, respectively. A) 90°, 90°, 90° B) 120°, 120°, 90° C) 120°, 120°, 109.5° D) 109.5°, 120°, 109.5° E) 109.5°, 90°, 120°

D) 109.5°, 120°, 109.5°

PCl5 has ________ electron domains and a ________ molecular arrangement. A) 6, trigonal bipyramidal B) 6, tetrahedral C) 5, square pyramidal D) 5, trigonal bipyramidal E) 6, seesaw

D) 5, trigonal bipyramidal

4) Of the following species, ________ will have bond angles of 120°. A) PH3 B) ClF3 C) NCl3 D) BCl3 E) All of these will have bond angles of 120°.

D) BCl3

) The molecular geometry consists of ________. a) a nonbonding pair of electrons b) a single bond c) a multiple bond A) a only B) b only C) c only D) a, b, and c E) b and c

D) a, b, and c

The basis of the VSEPR model of molecular bonding is ________. A) regions of electron density on an atom will organize themselves so as to maximize s-character B) regions of electron density in the valence shell of an atom will arrange themselves so as to maximize overlap C) atomic orbitals of the bonding atoms must overlap for a bond to form D) electron domains in the valence shell of an atom will arrange themselves so as to minimize repulsions E) hybrid orbitals will form as necessary to, as closely as possible, achieve spherical symmetry

D) electron domains in the valence shell of an atom will arrange themselves so as to minimize repulsions

) What is the hybridization of the carbon atom attached to the two oxygen atoms in the structure below? A) sp3 B) sp C) sp3d2 D) sp2 E) sp3d

D) sp2

) The hybridizations of nitrogen in NF3 and NH3 are ________ and ________, respectively. A) sp2, sp2 B) sp, sp3 C) sp3, sp D) sp3, sp3 E) sp2, sp3

D) sp3, sp3

25) What are the hybrid orbitals used for bonding by Xe in a XeCl4 molecule? A) sp2 B) sp3d2 C) sp3 D) sp3d E) sp

D) sp3d

) The hybridizations of bromine in BrF5 and of arsenic in AsF5 are ________ and ________, respectively. A) sp3, sp3d B) sp3d, sp3d2 C) sp3d, sp3 D) sp3d2, sp3d E) sp3d2, sp3d2

D) sp3d2, sp3d

The molecular geometry of the BCl3 molecule is ________, and this molecule is ________. A) trigonal pyramidal, polar B) trigonal pyramidal, nonpolar C) trigonal planar, polar D) trigonal planar, nonpolar E) trigonal bipyramidal, polar

D) trigonal planar, nonpolar

Consider the following species when answering the following questions: (i) BCl3 (ii) CCl4 (iii) TeCl4 (iv) XeF4 (v) SF6 Which of the molecules has a square planar shape? A) (i) and (ii) B) (i) and (v) C) (iii) only D) (ii) and (iv) E) (iv) only

E) (iv) only

There are ________ σ bonds and ________ π bonds in H3C-CH2-CH CH-CH2-C CH. A) 14, 2 B) 10, 3 C) 12, 2 D) 13, 2 E) 16, 3

E) 16, 3

) The sp3d2 atomic hybrid orbital set accommodates ________ electron domains. A) 2 B) 3 C) 4 D) 5 E) 6

E) 6

) A typical double bond ________. A) is stronger and shorter than a single bond B) consists of one σ bond and one π bond C) imparts rigidity to a molecule D) consists of two shared electron pairs E) All of the above answers are correct.

E) All of the above answers are correct.

The electron-domain geometry of ________ is tetrahedral. A) CBr4 B) PH3 C) CCl2Br2 D) XeF4 E) all of the above except XeF4

E) all of the above except XeF4

What is the molecular shape of H2O? A) T-shaped B) tetrahedral C) linear D) trigonal pyramidal E) bent

E) bent