Question 1

What is the hybridization of the oxygen in the H3OF1F1F1S1F1F1F10 ion?

Accepted Answer

A) sp2 
B) sp3 
C) sp3d 
D) sp 
E) sp3d 2 
A) sp2 
B) sp3 
C) sp3d 
D) sp 
E) sp3d 2

Question 2

Which of the following molecules or ions is not polar?

Accepted Answer

A) BF3 
B) CHCl3 
C) H2CO 
D) NH3 
E) SF4 
A) BF3 
B) CHCl3 
C) H2CO 
D) NH3 
E) SF4

Question 3

The tetrahedral bond angle is ________

Accepted Answer

A) 90F1F1F1S1F1F1F10. 
B) 180F1F1F1S1F1F1F10. 
C) 109.5F1F1F1S1F1F1F10. 
D) 120F1F1F1S1F1F1F10. 
E) 105F1F1F1S1F1F1F10. 
A) 90F1F1F1S1F1F1F10. 
B) 180F1F1F1S1F1F1F10. 
C) 109.5F1F1F1S1F1F1F10. 
D) 120F1F1F1S1F1F1F10. 
E) 105F1F1F1S1F1F1F10.

Question 4

What is the molecular geometry around a central atom having four single bonds and two lone pairs (i.e., nonbonding pair)?

Accepted Answer

A) square pyramidal 
B) square planar 
C) trigonal bipyramidal 
D) octahedral 
E) seesaw 
A) square pyramidal 
B) square planar 
C) trigonal bipyramidal 
D) octahedral 
E) seesaw

Question 5

When Ge is doped with Ga, it produces a(n) ________-type semiconductor.

Accepted Answer

The answer of When Ge is doped with Ga, it...

Question 6

Draw the correct orientation of the dipole in SF4.

Accepted Answer

Question 7

Which element would be used to dope silicon to produce a p-type semiconductor?

Accepted Answer

A) boron (
B)  
B) carbon (
C)  
C) aluminum (Al) 
D) phosphorus (P) 
E) germanium (Ge) 
A) boron (
B)  
B) carbon (
C)  
C) aluminum (Al) 
D) phosphorus (P) 
E) germanium (Ge)

Question 8

Which statement about sigma (F1F1F1S1F1F1F10) and pi (F1F1F1S1F1F1F10) bonds is not correct?

Accepted Answer

A) A F1F1F1S1F1F1F10bond has the region of high electron density aligned along the bond axis, which is the line connecting the two atoms. 
B) A F1F1F1S1F1F1F10bond has regions of high electron density lying above and below the bond axis, which is the line connecting the two atoms. 
C) A F1F1F1S1F1F1F10bond commonly is formed from the overlap of two unhybridized atomic 2p orbitals. 
D) In the trigonal planar geometry, the F1F1F1S1F1F1F10bonds are formed from the overlap of an sp2 hybridized orbital with another orbital. 
E) The molecule acetylene, C2H2, has five F1F1F1S1F1F1F10bonds and one F1F1F1S1F1F1F10 bond. 
A) A F1F1F1S1F1F1F10bond has the region of high electron density aligned along the bond axis, which is the line connecting the two atoms. 
B) A F1F1F1S1F1F1F10bond has regions of high electron density lying above and below the bond axis, which is the line connecting the two atoms. 
C) A F1F1F1S1F1F1F10bond commonly is formed from the overlap of two unhybridized atomic 2p orbitals. 
D) In the trigonal planar geometry, the F1F1F1S1F1F1F10bonds are formed from the overlap of an sp2 hybridized orbital with another orbital. 
E) The molecule acetylene, C2H2, has five F1F1F1S1F1F1F10bonds and one F1F1F1S1F1F1F10 bond.

Question 9

The local molecular geometry and hybridization around the labeled carbon atom in the following molecule are ________

Accepted Answer

A) trigonal bipyramidal and sp. 
B) trigonal planar and sp3. 
C) trigonal planar and sp2. 
D) tetrahedral and sp3. 
E) linear and sp. 
A) trigonal bipyramidal and sp. 
B) trigonal planar and sp3. 
C) trigonal planar and sp2. 
D) tetrahedral and sp3. 
E) linear and sp.

Question 10

Which electron-pair geometry has the largest electron-electron repulsive forces?

Accepted Answer

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

Question 11

Arrange the interactions between pairs of electrons in order of increasing strength.

Accepted Answer

A) bonding pair-bonding pair F1F1F1S1F1F1F10 lone pair-bonding pair F1F1F1S1F1F1F10 lone pair-lone pair 
B) bonding pair-bonding pair F1F1F1S1F1F1F10 lone pair-lone pair F1F1F1S1F1F1F10 lone pair-bonding pair 
C) lone pair-lone pair F1F1F1S1F1F1F10 lone pair-bonding pair F1F1F1S1F1F1F10 bonding pair-bonding pair 
D) lone pair-lone pair F1F1F1S1F1F1F10 bonding pair-bonding pair F1F1F1S1F1F1F10 lone pair-bonding pair 
E) lone pair-bonding pair F1F1F1S1F1F1F10 bonding pair-bonding pair F1F1F1S1F1F1F10 lone pair-lone pair 
A) bonding pair-bonding pair F1F1F1S1F1F1F10 lone pair-bonding pair F1F1F1S1F1F1F10 lone pair-lone pair 
B) bonding pair-bonding pair F1F1F1S1F1F1F10 lone pair-lone pair F1F1F1S1F1F1F10 lone pair-bonding pair 
C) lone pair-lone pair F1F1F1S1F1F1F10 lone pair-bonding pair F1F1F1S1F1F1F10 bonding pair-bonding pair 
D) lone pair-lone pair F1F1F1S1F1F1F10 bonding pair-bonding pair F1F1F1S1F1F1F10 lone pair-bonding pair 
E) lone pair-bonding pair F1F1F1S1F1F1F10 bonding pair-bonding pair F1F1F1S1F1F1F10 lone pair-lone pair

Question 12

Which one of the following statements regarding molecular orbitals for diatomic molecules is not correct?

Accepted Answer

A) An atomic orbital on one atom combines with an atomic orbital on the other atom to form two molecular orbitals. 
B) 2p atomic orbitals only form F1F1F1S1F1F1F10 and F1F1F1S1F1F1F10F1F1F1S1F1F1F10* molecular orbitals. 
C) 2s atomic orbitals only form F1F1F1S1F1F1F10 and F1F1F1S1F1F1F10F1F1F1S1F1F1F10* atomic orbitals. 
D) (F1F1F1S1F1F1F10 orbitals are symmetric with respect to rotation around the internuclear axis; F1F1F1S1F1F1F10 orbitals do not have this symmetry.) 
E) A bonding molecular orbital describes the buildup of negatively charged electrons between the nuclei. 
A) An atomic orbital on one atom combines with an atomic orbital on the other atom to form two molecular orbitals. 
B) 2p atomic orbitals only form F1F1F1S1F1F1F10 and F1F1F1S1F1F1F10F1F1F1S1F1F1F10* molecular orbitals. 
C) 2s atomic orbitals only form F1F1F1S1F1F1F10 and F1F1F1S1F1F1F10F1F1F1S1F1F1F10* atomic orbitals. 
D) (F1F1F1S1F1F1F10 orbitals are symmetric with respect to rotation around the internuclear axis; F1F1F1S1F1F1F10 orbitals do not have this symmetry.) 
E) A bonding molecular orbital describes the buildup of negatively charged electrons between the nuclei.

Question 13

For which of the following molecules is the electron pair geometry tetrahedral and the molecular geometry pyramidal?

Accepted Answer

A) SF4 
B) SiH4 
C) BF3 
D) PH3 
E) ClF3 
A) SF4 
B) SiH4 
C) BF3 
D) PH3 
E) ClF3

Question 14

What type of hybridization is needed to describe the bonding in a seesaw-shaped molecule?

Accepted Answer

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

Question 15

Which of the following materials could be classified as an n-type semiconductor?

Accepted Answer

A) C doped with Ga 
B) Ge doped with Sn 
C) Se doped with Sb 
D) Si doped with As 
E) None of these are n-type semiconductors. 
A) C doped with Ga 
B) Ge doped with Sn 
C) Se doped with Sb 
D) Si doped with As 
E) None of these are n-type semiconductors.

Question 16

According to band theory, when the lower energy ________ band overlaps with the higher energy ________ band, the material will act as a ________ of electricity.

Accepted Answer

valence; c

Question 17

Band theory of bonding in solids ________

Accepted Answer

A) is an extension of molecular orbital theory. 
B) describes bonds as rubber bands. 
C) does not apply to any type of solid other than metals. 
D) explains bond formation in metals, but not their physical properties. 
E) All of the above are correct. 
A) is an extension of molecular orbital theory. 
B) describes bonds as rubber bands. 
C) does not apply to any type of solid other than metals. 
D) explains bond formation in metals, but not their physical properties. 
E) All of the above are correct.

Question 18

Carbonyl dihalides (COX2 with X = I, Cl, or Br) are irritants and can cause blistering of tissue. Their reactivity with tissue is influenced by their polarity. Place these compounds in order of decreasing polarity and explain your reasoning.

Accepted Answer

CH₂O is polar with the O negative. The ad

Question 19

Predict the bond order of F2F1F1F1S1F1F1F10.

Accepted Answer

A) 0 
B) 0.5 
C) 1 
D) 1.5 
E) 2 
A) 0 
B) 0.5 
C) 1 
D) 1.5 
E) 2

Question 20

Predict the bond order of the NOF1F1F1S1F1F1F10 molecular ion.

Accepted Answer

A) 2 
B) 2.5 
C) 3 
D) 1 
E) 1.5 
A) 2 
B) 2.5 
C) 3 
D) 1 
E) 1.5

Exam 9: Molecular Geometry: Shape Determines Function

What is the hybridization of the oxygen in the H3O ion?

Which of the following molecules or ions is not polar?

The tetrahedral bond angle is ________

What is the molecular geometry around a central atom having four single bonds and two lone pairs (i.e., nonbonding pair)?

When Ge is doped with Ga, it produces a(n) ________-type semiconductor.

Draw the correct orientation of the dipole in SF4.

Which element would be used to dope silicon to produce a p-type semiconductor?

Which statement about sigma () and pi () bonds is not correct?

The local molecular geometry and hybridization around the labeled carbon atom in the following molecule are ________

Which electron-pair geometry has the largest electron-electron repulsive forces?

Arrange the interactions between pairs of electrons in order of increasing strength.

Which one of the following statements regarding molecular orbitals for diatomic molecules is not correct?

For which of the following molecules is the electron pair geometry tetrahedral and the molecular geometry pyramidal?

What type of hybridization is needed to describe the bonding in a seesaw-shaped molecule?

Which of the following materials could be classified as an n-type semiconductor?

According to band theory, when the lower energy ________ band overlaps with the higher energy ________ band, the material will act as a ________ of electricity.

Band theory of bonding in solids ________

Carbonyl dihalides (COX2 with X = I, Cl, or Br) are irritants and can cause blistering of tissue. Their reactivity with tissue is influenced by their polarity. Place these compounds in order of decreasing polarity and explain your reasoning.

Predict the bond order of F2.

Predict the bond order of the NO molecular ion.

Matter and Energy: The Origin of the Universe

Atoms, Ions, and Molecules: Matter Starts Here

Stoichiometry: Mass, Formulas, and Reactions

Solution Chemistry: The Hydrosphere

Thermochemistry: Energy Changes in Reactions

Properties of Gases: The Air We Breathe

A Quantum Model of Atoms: Waves and Particles

Chemical Bonds: What Makes a Gas a Greenhouse Gas

Intermolecular Forces: The Uniqueness of Water

Solutions: Properties and Behavior

Solids: Crystals, Alloys, and Polymers

Chemical Kinetics: Reactions in the Atmosphere

Chemical Equilibrium: How Much Product Does a Reaction Really Make

Acidbase Equilibria: Proton Transfer in Biological Systems

Additional Aqueous Equilibria: Chemistry and the Oceans

Thermodynamics: Spontaneous and Nonspontaneous Reactions and Processes

Electrochemistry: The Quest for Clean Energy

Nuclear Chemistry: Applications to Energy and Medicine

Organic and Biological Molecules: the Compounds of Life

The Main Group Elements: Life and the Periodic Table

Transition Metals: Biological and Medical Applications

Filters

What is the hybridization of the oxygen in the H₃O^ ion?

Draw the correct orientation of the dipole in SF₄.

According to band theory, when the lower energy band overlaps with the higher energy band, the material will act as a of electricity.

Carbonyl dihalides (COX₂ with X = I, Cl, or Br) are irritants and can cause blistering of tissue. Their reactivity with tissue is influenced by their polarity. Place these compounds in order of decreasing polarity and explain your reasoning.

Predict the bond order of F₂^.

Predict the bond order of the NO^ molecular ion.