Question 1

Give the number of lone pairs around the central atom and the molecular geometry of XeF2.

Accepted Answer

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

Question 2

Use VSEPR theory to predict the molecular geometry of H3O+ (hydronium ion).

Accepted Answer

Question 3

An sp hybridized central carbon atom with no lone pairs of electrons has what type of bonding?

Accepted Answer

A) 1 $\pi$ and 2  $\sigma$ bonds 
B) 1 $\pi$ and 3  $\sigma$ bonds 
C) 2 $\pi$ and 2  $\sigma$ bonds 
D) 3 $\pi$ and 2 $\sigma$ bonds 
E) 0 $\pi$ and 4 $\sigma$ bonds 
A) 1 $\pi$ and 2  $\sigma$ bonds 
B) 1 $\pi$ and 3  $\sigma$ bonds 
C) 2 $\pi$ and 2  $\sigma$ bonds 
D) 3 $\pi$ and 2 $\sigma$ bonds 
E) 0 $\pi$ and 4 $\sigma$ bonds

Question 4

A sp3 hybridized central nitrogen atom with 1 lone pair of electrons has what type of bonding?

Accepted Answer

A) 1 $\pi$ and 2 $\sigma$ bonds 
B) 2 $\pi$ and 3 $\sigma$ bonds 
C) 1 $\pi$ and 3 $\sigma$ bonds 
D) 0 $\pi$ and 3 $\sigma$ bonds 
E) 0 $\pi$ and 4 $\sigma$ bonds 
A) 1 $\pi$ and 2 $\sigma$ bonds 
B) 2 $\pi$ and 3 $\sigma$ bonds 
C) 1 $\pi$ and 3 $\sigma$ bonds 
D) 0 $\pi$ and 3 $\sigma$ bonds 
E) 0 $\pi$ and 4 $\sigma$ bonds

Question 5

Predict the geometry and polarity of the CS2 molecule.

Accepted Answer

A) linear, polar 
B) linear, nonpolar 
C) tetrahedral, nonpolar 
D) bent, nonpolar 
E) bent, polar 
A) linear, polar 
B) linear, nonpolar 
C) tetrahedral, nonpolar 
D) bent, nonpolar 
E) bent, polar

Question 6

Two py orbitals from two different atoms can interact to form a pi bonding molecular orbital.

Accepted Answer

A) True 
 B)False

Question 7

Two px orbitals from two different atoms can interact to form a sigma bonding molecular orbital.

Accepted Answer

A) True 
 B)False

Question 8

N,N-diethyl-m-tolumide (DEET)is the active ingredient in many mosquito repellents.   How many sigma bonds and pi bonds are contained in a DEET molecule?

Accepted Answer

31 sigma b

Question 9

Indicate the type of hybrid orbitals used by the central atom in TeF4.

Accepted Answer

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

Question 10

The N - N - H bond angles in hydrazine N2H4 are 112°.What is the hybridization of the nitrogen orbitals predicted by valence bond theory?

Accepted Answer

Question 11

According to Molecular Orbital Theory, two separate 1s orbitals interact to form what molecular orbital(s)?

Accepted Answer

A) ($\sigma$ only) 
B) ($\sigma$ and $\sigma$*) 
C) ($\pi$only) 
D) ($\pi$ and $\pi$*) 
E) ($\sigma$and $\pi$) 
A) ($\sigma$ only) 
B) ($\sigma$ and $\sigma$*) 
C) ($\pi$only) 
D) ($\pi$ and $\pi$*) 
E) ($\sigma$and $\pi$)

Question 12

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

Accepted Answer

Question 13

The hybridization of the central nitrogen atom in the molecule N2O is

Accepted Answer

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

Question 14

Give the number of lone pairs around the central atom and the geometry of the ion ClO2-.

Accepted Answer

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

Question 15

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 16

Which of the following molecules has polar bonds but is a nonpolar molecule

Accepted Answer

A) CO 
B) CO2 
C) CHCl3 
D) Cl2 
E) HCl 
A) CO 
B) CO2 
C) CHCl3 
D) Cl2 
E) HCl

Question 17

The geometry of the hybrid orbitals about a central atom with sp3d2 hybridization is:

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 18

A molecule with 4 single bonds (and any number of lone pairs)could have which of the following molecular geometries? I.Tetrahedral
II.Seesaw
III.Square Planar
IV.T-shaped

Accepted Answer

A) I only 
B) I and III 
C) II and III 
D) I, II, and III 
E) I, II, III, and IV 
A) I only 
B) I and III 
C) II and III 
D) I, II, and III 
E) I, II, III, and IV

Question 19

Which of the following molecules has polar bonds but is a nonpolar molecule? PCl5, PCl3, NCl3 and CO2

Accepted Answer

Question 20

The geometry of the CS2 molecule is best described as

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.

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

Give the number of lone pairs around the central atom and the molecular geometry of XeF2.

Use VSEPR theory to predict the molecular geometry of H3O+ (hydronium ion).

An sp hybridized central carbon atom with no lone pairs of electrons has what type of bonding?

A sp3 hybridized central nitrogen atom with 1 lone pair of electrons has what type of bonding?

Predict the geometry and polarity of the CS2 molecule.

Two py orbitals from two different atoms can interact to form a pi bonding molecular orbital.

Two px orbitals from two different atoms can interact to form a sigma bonding molecular orbital.

N,N-diethyl-m-tolumide (DEET)is the active ingredient in many mosquito repellents. How many sigma bonds and pi bonds are contained in a DEET molecule?

Indicate the type of hybrid orbitals used by the central atom in TeF4.

The N - N - H bond angles in hydrazine N2H4 are 112°.What is the hybridization of the nitrogen orbitals predicted by valence bond theory?

According to Molecular Orbital Theory, two separate 1s orbitals interact to form what molecular orbital(s)?

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

The hybridization of the central nitrogen atom in the molecule N2O is

Give the number of lone pairs around the central atom and the geometry of the ion ClO2-.

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

Which of the following molecules has polar bonds but is a nonpolar molecule

The geometry of the hybrid orbitals about a central atom with sp3d2 hybridization is:

A molecule with 4 single bonds (and any number of lone pairs)could have which of the following molecular geometries? I.Tetrahedral II.Seesaw III.Square Planar IV.T-shaped

Which of the following molecules has polar bonds but is a nonpolar molecule? PCl5, PCl3, NCl3 and CO2

The geometry of the CS2 molecule is best described as

Chemistry: the Study of Change

Atoms, Molecules, and Ions

Mass Relationships in Chemical Reactions

Reactions in Aqueous Solutions

Gases

Thermochemistry

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

Entropy Free Energy and Equilibrium

Electrochemistry

Nuclear Chemistry

Chemistry in the Atmosphere

Metallurgy and the Chemistry of Metals

Nonmetallic Elements and Their Compounds

Transition Metal Chemistry and Coordination Compounds

Organic Chemistry

Synthetic and Natural Organic Polymers

Filters

Give the number of lone pairs around the central atom and the molecular geometry of XeF₂.

Use VSEPR theory to predict the molecular geometry of H₃O⁺ (hydronium ion).

A sp³ hybridized central nitrogen atom with 1 lone pair of electrons has what type of bonding?

Predict the geometry and polarity of the CS₂ molecule.

Two p_y orbitals from two different atoms can interact to form a pi bonding molecular orbital.

Two p_x orbitals from two different atoms can interact to form a sigma bonding molecular orbital.

Indicate the type of hybrid orbitals used by the central atom in TeF₄.

The N - N - H bond angles in hydrazine N₂H₄ are 112°.What is the hybridization of the nitrogen orbitals predicted by valence bond theory?

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

The hybridization of the central nitrogen atom in the molecule N₂O is

Give the number of lone pairs around the central atom and the geometry of the ion ClO₂^-.

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

The geometry of the hybrid orbitals about a central atom with sp³d² hybridization is:

Which of the following molecules has polar bonds but is a nonpolar molecule? PCl₅, PCl₃, NCl₃ and CO₂

The geometry of the CS₂ molecule is best described as