Question 1

Indicate the type of hybrid orbitals used by the central atom in PCl3.

Accepted Answer

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

Question 2

According to the VSEPR theory, the geometrical structure of PF5 is

Accepted Answer

trigonal b

Question 3

N,N-diethyl-m-tolumide (DEET)is the active ingredient in many mosquito repellents.What is the hybridization state of carbon indicated by the arrow in the structure of DEET shown below?

Accepted Answer

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

Question 4

In which of the following would the bonding be strengthened with the addition of an electron to form the negative molecular ion?

Accepted Answer

A) C2 
B) O2 
C) N2 
D) all of these 
E) none of these 
A) C2 
B) O2 
C) N2 
D) all of these 
E) none of these

Question 5

Give the number of lone pairs around the central atom and the molecular geometry of IF5.

Accepted Answer

A) 0 lone pairs, square pyramidal 
B) 0 lone pairs, trigonal bipyramidal 
C) 1 lone pair, octahedral 
D) 1 lone pair, square pyramidal 
E) 2 lone pairs, pentagonal 
A) 0 lone pairs, square pyramidal 
B) 0 lone pairs, trigonal bipyramidal 
C) 1 lone pair, octahedral 
D) 1 lone pair, square pyramidal 
E) 2 lone pairs, pentagonal

Question 6

Give the number of lone pairs around the central atom and the geometry of the ion NO2-.

Accepted Answer

A) 0 lone pairs, linear 
B) 1 lone pair, bent 
C) 2 lone pair, bent 
D) 3 lone pairs, bent 
E) 3 lone pairs, linear 
A) 0 lone pairs, linear 
B) 1 lone pair, bent 
C) 2 lone pair, bent 
D) 3 lone pairs, bent 
E) 3 lone pairs, linear

Question 7

The C-N-O bond angle in nitromethane, CH3NO2, is expected to by approximately

Accepted Answer

A) 60° 
B) 90° 
C) 109.5° 
D) 120° 
E) 180° 
A) 60° 
B) 90° 
C) 109.5° 
D) 120° 
E) 180°

Question 8

Predict the geometry around the central atom in PO43-.

Accepted Answer

A) trigonal planar 
B) trigonal pyramidal 
C) tetrahedral 
D) trigonal bipyramidal 
E) octahedral 
A) trigonal planar 
B) trigonal pyramidal 
C) tetrahedral 
D) trigonal bipyramidal 
E) octahedral

Question 9

Ibuprofen is used as an analgesic for the relief of pain, and also to help reduce fever.What is the hybridization state of carbon indicated by the arrow in the structure of ibuprofen shown below?

Accepted Answer

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

Question 10

What is the hybridization of the central atom in ClO3-?

Accepted Answer

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

Question 11

Which of the following correctly lists species in order of increasing bond length?

Accepted Answer

A) C2- 2 2+ 
B) C2 2+ 2- 
C) C2- 2+ 2 
D) C2+ 2 2- 
E) C2+ 2- 2 
A) C2- 2 2+ 
B) C2 2+ 2- 
C) C2- 2+ 2 
D) C2+ 2 2- 
E) C2+ 2- 2

Question 12

According to the VSEPR theory, the geometry of the SO3 molecule is

Accepted Answer

A) pyramidal. 
B) tetrahedral. 
C) trigonal planar. 
D) distorted tetrahedron (seesaw). 
E) square planar. 
A) pyramidal. 
B) tetrahedral. 
C) trigonal planar. 
D) distorted tetrahedron (seesaw). 
E) square planar.

Question 13

The geometry of the SF4 molecule is

Accepted Answer

A) tetrahedral. 
B) trigonal pyramidal. 
C) trigonal planar. 
D) square planar. 
E) distorted tetrahedron (seesaw). 
A) tetrahedral. 
B) trigonal pyramidal. 
C) trigonal planar. 
D) square planar. 
E) distorted tetrahedron (seesaw).

Question 14

Draw a Lewis structure for PF5 that shows the correct atom arrangement predicted by VSEPR theory.

Accepted Answer

Question 15

Which of the following is not true of molecular orbitals?

Accepted Answer

A) The number of molecular orbitals formed is always equal to the number of atomic orbitals combined. 
B) A molecular orbital can accommodate up to two electrons. 
C) When electrons are added to orbitals of the same energy, the most stable arrangement is predicted by Hund's rule. 
D) Low-energy molecular orbitals fill before high-energy molecular orbitals fill. 
E) For any substance, the number of electrons in molecular orbitals is equal to the sum of all the valence electrons on the bonding atoms. 
A) The number of molecular orbitals formed is always equal to the number of atomic orbitals combined. 
B) A molecular orbital can accommodate up to two electrons. 
C) When electrons are added to orbitals of the same energy, the most stable arrangement is predicted by Hund's rule. 
D) Low-energy molecular orbitals fill before high-energy molecular orbitals fill. 
E) For any substance, the number of electrons in molecular orbitals is equal to the sum of all the valence electrons on the bonding atoms.

Question 16

Which should have the longer bond, B2 or B2-?

Accepted Answer

Question 17

In which of the following would the bonding be weakened with the addition of an electron to form the negative molecular ion?

Accepted Answer

A) N2 
B) O2 
C) F2 
D) all of these 
E) none of these 
A) N2 
B) O2 
C) F2 
D) all of these 
E) none of these

Question 18

According to VSEPR theory, which one of the following molecules should have a geometry that is trigonal bipyramidal?

Accepted Answer

A) SF4 
B) XeF4 
C) NF3 
D) SF6 
E) PF5 
A) SF4 
B) XeF4 
C) NF3 
D) SF6 
E) PF5

Question 19

Which one of the following molecules has a zero dipole moment?

Accepted Answer

A) CO 
B) CH2Cl2 
C) SO3 
D) SO2 
E) NH3 
A) CO 
B) CH2Cl2 
C) SO3 
D) SO2 
E) NH3

Question 20

According to VSEPR theory, which one of the following molecules has tetrahedral geometry?

Accepted Answer

A) NH3 
B) CCl4 
C) CO2 
D) SF4 
E) PCl5 
A) NH3 
B) CCl4 
C) CO2 
D) SF4 
E) PCl5

Exam 10: Chemical Bonding Ii: Molecular Geometry and Hybridization of Atomic Orbitals

Indicate the type of hybrid orbitals used by the central atom in PCl3.

According to the VSEPR theory, the geometrical structure of PF5 is

N,N-diethyl-m-tolumide (DEET)is the active ingredient in many mosquito repellents.What is the hybridization state of carbon indicated by the arrow in the structure of DEET shown below?

In which of the following would the bonding be strengthened with the addition of an electron to form the negative molecular ion?

Give the number of lone pairs around the central atom and the molecular geometry of IF5.

Give the number of lone pairs around the central atom and the geometry of the ion NO2-.

The C-N-O bond angle in nitromethane, CH3NO2, is expected to by approximately

Predict the geometry around the central atom in PO43-.

Ibuprofen is used as an analgesic for the relief of pain, and also to help reduce fever.What is the hybridization state of carbon indicated by the arrow in the structure of ibuprofen shown below?

What is the hybridization of the central atom in ClO3-?

Which of the following correctly lists species in order of increasing bond length?

According to the VSEPR theory, the geometry of the SO3 molecule is

The geometry of the SF4 molecule is

Draw a Lewis structure for PF5 that shows the correct atom arrangement predicted by VSEPR theory.

Which of the following is not true of molecular orbitals?

Which should have the longer bond, B2 or B2-?

In which of the following would the bonding be weakened with the addition of an electron to form the negative molecular ion?

According to VSEPR theory, which one of the following molecules should have a geometry that is trigonal bipyramidal?

Which one of the following molecules has a zero dipole moment?

According to VSEPR theory, which one of the following molecules has tetrahedral geometry?

Chemistry: The Study of Change

Atoms, Molecules, and Ions

Mass Relationships in Chemical Reactions

Reactions in Aqueous Solution

Gases

Thermo-Chemistry

Quantum Theory and the Electronic Structure of Atoms

Periodic Relationships Among the Elements

Chemical Bonding I: Basic Concepts

Intermolecular Forces and Liquids and Solids

Physical Properties of Solutions

Chemical Kinetics

Chemical Equilibrium

Acids and Bases

Acid-Base Equilibria and Solubility Equilibria

Chemistry in the Atmosphere

Entropy, Free Energy, and Equilibrium

Electrochemistry

Metallurgy and the Chemistry of Metals

Nonmetallic Elements and Their Compounds

Transition Metal Chemistry and Coordination Compounds

Nuclear Chemistry

Organic Chemistry

Synthetic and Natural Organic Polymers

Filters

Indicate the type of hybrid orbitals used by the central atom in PCl₃.

According to the VSEPR theory, the geometrical structure of PF₅ is

Give the number of lone pairs around the central atom and the molecular geometry of IF₅.

Give the number of lone pairs around the central atom and the geometry of the ion NO₂^-.

The C-N-O bond angle in nitromethane, CH₃NO₂, is expected to by approximately

Predict the geometry around the central atom in PO₄^3-.

What is the hybridization of the central atom in ClO₃^-?

According to the VSEPR theory, the geometry of the SO₃ molecule is

The geometry of the SF₄ molecule is

Draw a Lewis structure for PF₅ that shows the correct atom arrangement predicted by VSEPR theory.

Which should have the longer bond, B₂ or B₂^-?