Question 1

Which is true for carbon monoxide?

Accepted Answer

A) CO has a short CO bond. 
B) CO has a zero dipole moment. 
C) The bond energy in CO is low. 
D) The atoms in CO cannot obey the octet rule. 
E) All of the are true about CO. 
A) CO has a short CO bond. 
B) CO has a zero dipole moment. 
C) The bond energy in CO is low. 
D) The atoms in CO cannot obey the octet rule. 
E) All of the are true about CO.

Question 2

What is the hybridization of As in the AsF4- ion?

Accepted Answer

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

Question 3

Which has a dipole moment of zero?

Accepted Answer

A) N2O 
B) NF3 
C) H2S 
D) SeO3 
E) CH3Cl 
A) N2O 
B) NF3 
C) H2S 
D) SeO3 
E) CH3Cl

Question 4

Which one of the following molecules is polar?

Accepted Answer

A) CH4 
B) CHBr3 
C) F2 
D) CBr4 
E) CO2 
A) CH4 
B) CHBr3 
C) F2 
D) CBr4 
E) CO2

Question 5

What is the predicted molecular geometry of the CH4 molecule according to the VSEPR model?

Accepted Answer

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

Question 6

According to the VSEPR model,a molecule with the general formula AB2 with two lone pairs on the central atom will have a _____ molecular geometry.

Accepted Answer

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

Question 7

In not more than two sentences,explain when and why chemists make use of the concept of hybridization.

Accepted Answer

Chemists postulate hybridizati

Question 8

Which of the following molecules has a nonzero dipole moment?

Accepted Answer

A) BeCl2 
B) SF2 
C) KrF2 
D) CO2 
E) CCl4 
A) BeCl2 
B) SF2 
C) KrF2 
D) CO2 
E) CCl4

Question 9

Which is the most reasonable prediction for the three F-Br-F bond angles in BrF3?

Accepted Answer

A) 90°,90°,and 180° 
B) 86°,94°,and 180° 
C) 86°,86°,and 172° 
D) 94°,94°,and 172° 
E) 120°,120°,and 120° 
A) 90°,90°,and 180° 
B) 86°,94°,and 180° 
C) 86°,86°,and 172° 
D) 94°,94°,and 172° 
E) 120°,120°,and 120°

Question 10

In one sentence state the basic principle of valence bond theory.

Accepted Answer

A covalent bond forms when the

Question 11

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

Accepted Answer

Question 12

What is the molecular geometry of ClO3F as predicted by the VSEPR model?

Accepted Answer

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

Question 13

According to molecular orbital theory,what is the bond order in the O2+ ion?

Accepted Answer

A) 5.5 
B) 5 
C) 4 
D) 2.5 
E) 1.5 
A) 5.5 
B) 5 
C) 4 
D) 2.5 
E) 1.5

Question 14

Predict the molecular 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 15

For a polyatomic ion having the general formula AB3n±,where A is an atom from Group 6A,B is an atom from Group 7A,and the ionic charge is n±,what charge must the ion have in order to yield a molecular geometry that is trigonal pyramidal?

Accepted Answer

A) 3- 
B) 1- 
C) 1+ 
D) 3+ 
E) 5+ 
A) 3- 
B) 1- 
C) 1+ 
D) 3+ 
E) 5+

Question 16

Which statement about orbital hybridization is incorrect?

Accepted Answer

A) The carbon atom in CH4 is sp3 hybridized. 
B) The carbon atom in CO2 is sp hybridized. 
C) The nitrogen atom in NH3 is sp2 hybridized. 
D) sp2 hybrid orbitals are coplanar,and at 120° to each other. 
E) sp hybrid orbitals lie at 180° to each other. 
A) The carbon atom in CH4 is sp3 hybridized. 
B) The carbon atom in CO2 is sp hybridized. 
C) The nitrogen atom in NH3 is sp2 hybridized. 
D) sp2 hybrid orbitals are coplanar,and at 120° to each other. 
E) sp hybrid orbitals lie at 180° to each other.

Question 17

What is the predicted O-C-O bond angle in CO2?

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 18

Pi bonds are covalent bonds in which the electron density is concentrated above and below the plane of the nuclei of the bonding atoms.

Accepted Answer

A) True 
 B)False

Question 19

According to the VSEPR model,the predicted molecular geometry of SiCl4 is

Accepted Answer

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

Question 20

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

Accepted Answer

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

Exam 9: Chemical Bonding Ii Molecular Geometry and Bonding Theories

Which is true for carbon monoxide?

What is the hybridization of As in the AsF4- ion?

Which has a dipole moment of zero?

Which one of the following molecules is polar?

What is the predicted molecular geometry of the CH4 molecule according to the VSEPR model?

According to the VSEPR model,a molecule with the general formula AB2 with two lone pairs on the central atom will have a _____ molecular geometry.

In not more than two sentences,explain when and why chemists make use of the concept of hybridization.

Which of the following molecules has a nonzero dipole moment?

Which is the most reasonable prediction for the three F-Br-F bond angles in BrF3?

In one sentence state the basic principle of valence bond theory.

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

What is the molecular geometry of ClO3F as predicted by the VSEPR model?

According to molecular orbital theory,what is the bond order in the O2+ ion?

Predict the molecular geometry and polarity of the CS2 molecule.

For a polyatomic ion having the general formula AB3n±,where A is an atom from Group 6A,B is an atom from Group 7A,and the ionic charge is n±,what charge must the ion have in order to yield a molecular geometry that is trigonal pyramidal?

Which statement about orbital hybridization is incorrect?

What is the predicted O-C-O bond angle in CO2?

Pi bonds are covalent bonds in which the electron density is concentrated above and below the plane of the nuclei of the bonding atoms.

According to the VSEPR model,the predicted molecular geometry of SiCl4 is

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

Chemistry: the Central Science

Atoms Molecules and Ions

Stoichiometry Ratios of Combination

Reactions in Aqueous Solutions

Thermochemistry

Quantum Theory and the Electronic Structure of Atoms

Electron Configuration and the Periodic Table

Chemical Bonding I Basic Concepts

Gases

Intermolecular Forces and the Physical Properties of Liquids and Solids

Modern Materials

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

Environmental Chemistry

Coordination Chemistry

Metallurgy and the Chemistry of Metals

Nonmetallic Elements and Their Compounds

Organic Chemistry

Filters

What is the hybridization of As in the AsF₄^- ion?

What is the predicted molecular geometry of the CH₄ molecule according to the VSEPR model?

According to the VSEPR model,a molecule with the general formula AB₂ with two lone pairs on the central atom will have a _____ molecular geometry.

Which is the most reasonable prediction for the three F-Br-F bond angles in BrF₃?

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

What is the molecular geometry of ClO₃F as predicted by the VSEPR model?

According to molecular orbital theory,what is the bond order in the O₂⁺ ion?

Predict the molecular geometry and polarity of the CS₂ molecule.

For a polyatomic ion having the general formula AB₃ⁿ^±,where A is an atom from Group 6A,B is an atom from Group 7A,and the ionic charge is n±,what charge must the ion have in order to yield a molecular geometry that is trigonal pyramidal?

What is the predicted O-C-O bond angle in CO₂?

According to the VSEPR model,the predicted molecular geometry of SiCl₄ is