Question 1

Valence bond theory predicts that iodine will use _____ hybrid orbitals in ICl2-.

Accepted Answer

A) sp2 
B) sp3 
C) sp3d 
D) sp3d2 
E) None of these choices is correct. 
A) sp2 
B) sp3 
C) sp3d 
D) sp3d2 
E) None of these choices is correct.

Question 2

The angles between sp2 hybrid orbitals are 109.5°.

Accepted Answer

A) True 
 B)False

Question 3

Atoms of period 3 and beyond can undergo sp3d2 hybridization,but atoms of period 2 cannot.

Accepted Answer

A) True 
 B)False

Question 4

According to molecular orbital theory,all diatomic molecules with an even number of electrons are diamagnetic.

Accepted Answer

A) True 
 B)False

Question 5

A molecule with the formula AB4 and a square planar molecular geometry uses _________ to form its σ bonds.

Accepted Answer

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

Question 6

Assume that an N2 molecule absorbs a photon and goes to its first excited state.

Accepted Answer

A) The excited N2 is less stable than N2 in the ground state. 
B) The excited N2 is more stable than N2 in the ground state. 
C) The bond length of N2 in the excited state is shorter than the bond length of N2 in the ground state. 
D) The stability of the molecule is unchanged. 
A) The excited N2 is less stable than N2 in the ground state. 
B) The excited N2 is more stable than N2 in the ground state. 
C) The bond length of N2 in the excited state is shorter than the bond length of N2 in the ground state. 
D) The stability of the molecule is unchanged.

Question 7

What is the bond order for the species O2−?

Accepted Answer

A) 1 
B) 1.5 
C) 2 
D) 2.5 
E) None of the 
A) 1 
B) 1.5 
C) 2 
D) 2.5 
E) None of the

Question 8

Predict the molecular geometry and polarity of the SO2 molecule.

Accepted Answer

A) linear,polar 
B) linear,nonpolar 
C) bent,polar 
D) bent,nonpolar 
E) trigonal planar,polar 
A) linear,polar 
B) linear,nonpolar 
C) bent,polar 
D) bent,nonpolar 
E) trigonal planar,polar

Question 9

Using the VSEPR model,what is the predicted molecular geometry of the PCl3 molecule?

Accepted Answer

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

Question 10

What is the molecular geometry of XeO2F2 as predicted by the VSEPR model?

Accepted Answer

A) square planar 
B) tetrahedral 
C) square pyramidal 
D) seesaw 
E) octahedral 
A) square planar 
B) tetrahedral 
C) square pyramidal 
D) seesaw 
E) octahedral

Question 11

What is the number of lone electron pairs on the central atom of a molecule having a seesaw molecular geometry,such as SF4?

Accepted Answer

A) 1 
B) 2 
C) 3 
D) 4 
E) 6 
A) 1 
B) 2 
C) 3 
D) 4 
E) 6

Question 12

What is the predicted molecular geometry of the IBr3 molecule according to the VSEPR model?

Accepted Answer

A) tetrahedral 
B) T-shaped 
C) bent 
D) trigonal planar 
E) seesaw 
A) tetrahedral 
B) T-shaped 
C) bent 
D) trigonal planar 
E) seesaw

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

In which molecule is the central atom sp2 hybridized?

Accepted Answer

A) SO2 
B) N2O 
C) BeCl2 
D) NF3 
E) PF5 
A) SO2 
B) N2O 
C) BeCl2 
D) NF3 
E) PF5

Question 15

For which one of the following molecules is the indicated type of hybridization not appropriate for the central atom?

Accepted Answer

A) BeCl2; sp2 
B) SiH4; sp3 
C) BF3; sp2 
D) C2H2; sp 
E) H2O; sp3 
A) BeCl2; sp2 
B) SiH4; sp3 
C) BF3; sp2 
D) C2H2; sp 
E) H2O; sp3

Question 16

The Lewis structure of formaldehyde,CH2O,is shown.Use VSEPR model to predict the molecular geometry and the H-C-H bond angle.Outline your reasoning.

Accepted Answer

There are three electron groups around t

Question 17

To correctly determine the molecular shape of a molecule requires that you first draw the Lewis structure for the molecule.

Accepted Answer

A) True 
 B)False

Question 18

How many π bonds are there in one molecule of 1,5-hexadiyne (shown below)?

Accepted Answer

A) 2 
B) 4 
C) 6 
D) 11 
E) 15 
A) 2 
B) 4 
C) 6 
D) 11 
E) 15

Question 19

What is the molecular geometry of HOF as predicted by the VSEPR model?

Accepted Answer

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

Question 20

According to the VSEPR model,a molecule with the general formula AB4 with two lone pairs on the central atom will have a _____ molecular geometry.

Accepted Answer

A) tetrahedral 
B) square pyramidal 
C) square planar 
D) octahedral 
E) seesaw 
A) tetrahedral 
B) square pyramidal 
C) square planar 
D) octahedral 
E) seesaw

Exam 9: Chemical Bonding Ii Molecular Geometry and Bonding Theories

Valence bond theory predicts that iodine will use _____ hybrid orbitals in ICl2-.

The angles between sp2 hybrid orbitals are 109.5°.

Atoms of period 3 and beyond can undergo sp3d2 hybridization,but atoms of period 2 cannot.

According to molecular orbital theory,all diatomic molecules with an even number of electrons are diamagnetic.

A molecule with the formula AB4 and a square planar molecular geometry uses _________ to form its σ bonds.

Assume that an N2 molecule absorbs a photon and goes to its first excited state.

What is the bond order for the species O2−?

Predict the molecular geometry and polarity of the SO2 molecule.

Using the VSEPR model,what is the predicted molecular geometry of the PCl3 molecule?

What is the molecular geometry of XeO2F2 as predicted by the VSEPR model?

What is the number of lone electron pairs on the central atom of a molecule having a seesaw molecular geometry,such as SF4?

What is the predicted molecular geometry of the IBr3 molecule according to the VSEPR model?

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

In which molecule is the central atom sp2 hybridized?

For which one of the following molecules is the indicated type of hybridization not appropriate for the central atom?

The Lewis structure of formaldehyde,CH2O,is shown.Use VSEPR model to predict the molecular geometry and the H-C-H bond angle.Outline your reasoning.

To correctly determine the molecular shape of a molecule requires that you first draw the Lewis structure for the molecule.

How many π bonds are there in one molecule of 1,5-hexadiyne (shown below)?

What is the molecular geometry of HOF as predicted by the VSEPR model?

According to the VSEPR model,a molecule with the general formula AB4 with two lone pairs on the central atom will have a _____ molecular geometry.

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Reactions in Aqueous Solutions

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Quantum Theory and the Electronic Structure of Atoms

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Intermolecular Forces and the Physical Properties of Liquids and Solids

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Acid-Base Equilibria and Solubility Equilibria

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Electrochemistry

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Nonmetallic Elements and Their Compounds

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Filters

Valence bond theory predicts that iodine will use _____ hybrid orbitals in ICl₂^-.

The angles between sp² hybrid orbitals are 109.5°.

Atoms of period 3 and beyond can undergo sp³d² hybridization,but atoms of period 2 cannot.

A molecule with the formula AB₄ and a square planar molecular geometry uses _________ to form its σ bonds.

Assume that an N₂ molecule absorbs a photon and goes to its first excited state.

What is the bond order for the species O₂⁻?

Predict the molecular geometry and polarity of the SO₂ molecule.

Using the VSEPR model,what is the predicted molecular geometry of the PCl₃ molecule?

What is the molecular geometry of XeO₂F₂ as predicted by the VSEPR model?

What is the number of lone electron pairs on the central atom of a molecule having a seesaw molecular geometry,such as SF₄?

What is the predicted molecular geometry of the IBr₃ molecule according to the VSEPR model?

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

In which molecule is the central atom sp² hybridized?

The Lewis structure of formaldehyde,CH₂O,is shown.Use VSEPR model to predict the molecular geometry and the H-C-H bond angle.Outline your reasoning.

According to the VSEPR model,a molecule with the general formula AB₄ with two lone pairs on the central atom will have a _____ molecular geometry.