Question 1

In counting the electron domains around the central atom in VSEPR theory,a ________ is not included.

Accepted Answer

A) nonbonding pair of electrons 
B) single covalent bond 
C) core level electron pair 
D) double covalent bond 
E) triple covalent bond 
A) nonbonding pair of electrons 
B) single covalent bond 
C) core level electron pair 
D) double covalent bond 
E) triple covalent bond

Question 2

PCl5 has ________ electron domains and a ________ molecular arrangement.

Accepted Answer

A) 6, trigonal bipyramidal 
B) 6, tetrahedral 
C) 5, square pyramidal 
D) 5, trigonal bipyramidal 
E) 6, seesaw 
A) 6, trigonal bipyramidal 
B) 6, tetrahedral 
C) 5, square pyramidal 
D) 5, trigonal bipyramidal 
E) 6, seesaw

Question 3

According to molecular orbital theory,the bond order of N-N in nitrogen gas is ________.

Accepted Answer

A) 0 
B) 1/2 
C) 1 
D) 2 
E) 3 
A) 0 
B) 1/2 
C) 1 
D) 2 
E) 3

Question 4

A triatomic molecule cannot be linear if the hybridization of the central atoms is ________.

Accepted Answer

A) sp 
B) sp2 
C) sp3 
D) sp2 or sp3 
E) sp2d or sp3d2 
A) sp 
B) sp2 
C) sp3 
D) sp2 or sp3 
E) sp2d or sp3d2

Question 5

There are ________ σ and ________ π bonds in the H-C≡C-H molecule.

Accepted Answer

A) 3, 2 
B) 3, 4 
C) 4, 3 
D) 2, 3 
E) 5, 0 
A) 3, 2 
B) 3, 4 
C) 4, 3 
D) 2, 3 
E) 5, 0

Question 6

Using the VSEPR model,the molecular geometry of the central atom in PCl3 is ________.

Accepted Answer

A) linear 
B) trigonal planar 
C) tetrahedral 
D) bent 
E) trigonal pyramidal 
A) linear 
B) trigonal planar 
C) tetrahedral 
D) bent 
E) trigonal pyramidal

Question 7

The hybridization of the terminal carbons in the H2C   C   CH2 molecule is ________.

Accepted Answer

A) sp 
B) sp2 
C) sp3 
D) sp3d 
E) sp3d2 
A) sp 
B) sp2 
C) sp3 
D) sp3d 
E) sp3d2

Question 8

The hybrid orbital set used by the central atom in PCl5 is ________.

Accepted Answer

A) sp 
B) sp2 
C) sp3 
D) sp3d 
E) sp3d2 
A) sp 
B) sp2 
C) sp3 
D) sp3d 
E) sp3d2

Question 9

A typical triple bond ________.

Accepted Answer

A) consists of one σ bond and two π bonds 
B) consists of three shared electrons 
C) consists of two σ bonds and one π bond 
D) consists of six shared electron pairs 
E) is longer than a single bond 
A) consists of one σ bond and two π bonds 
B) consists of three shared electrons 
C) consists of two σ bonds and one π bond 
D) consists of six shared electron pairs 
E) is longer than a single bond

Question 10

Of the molecules below,only ________ is nonpolar.

Accepted Answer

A) BF3 
B) NF3 
C) IF3 
D) PBr3 
E) BrCl3 
A) BF3 
B) NF3 
C) IF3 
D) PBr3 
E) BrCl3

Question 11

A molecule must have at least two resonance structures in order to display ________.

Accepted Answer

A) delocalized σ bonding 
B) trigonal planar electron group geometry 
C) localized π bonding 
D) delocalized π bonding 
E) localized σ bonding 
A) delocalized σ bonding 
B) trigonal planar electron group geometry 
C) localized π bonding 
D) delocalized π bonding 
E) localized σ bonding

Question 12

The molecular geometry of the right-most carbon in the molecule below is ________.

Accepted Answer

A) trigonal planar 
B) trigonal bipyramidal 
C) tetrahedral 
D) octahedral 
E) T-shaped 
A) trigonal planar 
B) trigonal bipyramidal 
C) tetrahedral 
D) octahedral 
E) T-shaped

Question 13

The bond angles in a tetrahedral molecule are ________ degrees.

Accepted Answer

A) 109.5 
B) 120 
C) 90 
D) 45 
E) <45 
A) 109.5 
B) 120 
C) 90 
D) 45 
E) <45

Question 14

The molecular geometry of the SF2 molecule is ________.

Accepted Answer

A) linear 
B) bent 
C) trigonal planar 
D) tetrahedral 
E) octahedral 
A) linear 
B) bent 
C) trigonal planar 
D) tetrahedral 
E) octahedral

Question 15

The molecular geometry of the SiH2Cl2 molecule is ________.

Accepted Answer

A) trigonal planar 
B) tetrahedral 
C) trigonal pyramidal 
D) octahedral 
E) T-shaped 
A) trigonal planar 
B) tetrahedral 
C) trigonal pyramidal 
D) octahedral 
E) T-shaped

Question 16

The electron-domain geometry and the molecular geometry of a molecule of the general formula ABn will always be the same if ________.

Accepted Answer

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 
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

Question 17

Using the VSEPR model,the molecular geometry of the central atom in SO3 is ________.

Accepted Answer

A) linear 
B) trigonal planar 
C) tetrahedral 
D) bent 
E) trigonal pyramidal 
A) linear 
B) trigonal planar 
C) tetrahedral 
D) bent 
E) trigonal pyramidal

Question 18

The N-H bond in ammonia consists of ________.

Accepted Answer

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 
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

Question 19

Three monosulfur fluorides are observed: SF2,SF4,and SF6.Of these,________ is/are polar.

Accepted Answer

A) SF2 only 
B) SF2 and SF4 only 
C) SF4 only 
D) SF6 only 
E) SF2, SF4, and SF6 
A) SF2 only 
B) SF2 and SF4 only 
C) SF4 only 
D) SF6 only 
E) SF2, SF4, and SF6

Question 20

What are the three bond angles in the trigonal bipyramidal structure?

Accepted Answer

The answer of What are the three bond angles in...

Exam 9: Molecular Geometry and Bonding Theories

In counting the electron domains around the central atom in VSEPR theory,a ________ is not included.

PCl5 has ________ electron domains and a ________ molecular arrangement.

According to molecular orbital theory,the bond order of N-N in nitrogen gas is ________.

A triatomic molecule cannot be linear if the hybridization of the central atoms is ________.

There are ________ σ and ________ π bonds in the H-C≡C-H molecule.

Using the VSEPR model,the molecular geometry of the central atom in PCl3 is ________.

The hybridization of the terminal carbons in the H2C C CH2 molecule is ________.

The hybrid orbital set used by the central atom in PCl5 is ________.

A typical triple bond ________.

Of the molecules below,only ________ is nonpolar.

A molecule must have at least two resonance structures in order to display ________.

The molecular geometry of the right-most carbon in the molecule below is ________.

The bond angles in a tetrahedral molecule are ________ degrees.

The molecular geometry of the SF2 molecule is ________.

The molecular geometry of the SiH2Cl2 molecule is ________.

The electron-domain geometry and the molecular geometry of a molecule of the general formula ABn will always be the same if ________.

Using the VSEPR model,the molecular geometry of the central atom in SO3 is ________.

The N-H bond in ammonia consists of ________.

Three monosulfur fluorides are observed: SF2,SF4,and SF6.Of these,________ is/are polar.

What are the three bond angles in the trigonal bipyramidal structure?

Introduction: Matter, energy, and Measurement

Atoms, molecules, and Ions

Chemical Reactions and Reaction Stoichiometry

Reactions in Aqueous Solution

Thermochemistry

Electronic Structure of Atoms

Periodic Properties of the Elements

Basic Concepts of Chemical Bonding

Gases

Liquids and Intermolecular Forces

Solids and Modern Materials

Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acid-Base Equilibria

Additional Aspects of Aqueous Equilibria

Chemistry of the Environment

Chemical Thermodynamics

Electrochemistry

Nuclear Chemistry

Chemistry of the Nonmetals

Transition Metals and Coordination Chemistry

The Chemistry of Life: Organic and Biological Chemistry

Filters

PCl₅ has electron domains and a molecular arrangement.

There are σ and π bonds in the H-C≡C-H molecule.

Using the VSEPR model,the molecular geometry of the central atom in PCl₃ is ________.

The hybridization of the terminal carbons in the H₂C C CH₂molecule is ________.

The hybrid orbital set used by the central atom in PCl₅ is ________.

The molecular geometry of the SF₂ molecule is ________.

The molecular geometry of the SiH₂Cl₂ molecule is ________.

The electron-domain geometry and the molecular geometry of a molecule of the general formula AB_n will always be the same if ________.

Using the VSEPR model,the molecular geometry of the central atom in SO₃ is ________.

Three monosulfur fluorides are observed: SF₂,SF₄,and SF₆.Of these,________ is/are polar.