Question 1

What is geometry around the carbon atom labeled C3?

Accepted Answer

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

Question 2

Which of the following molecules does not have a dipole moment?

Accepted Answer

A) C2H4     
B) NH3 
C) CH3NH2 
D) HCl 
A) C2H4     
B) NH3 
C) CH3NH2 
D) HCl

Question 3

Pt(NH3)2Cl2 is square planar.The isomer of Pt(NH3)2Cl2 that has a non-zero dipole moment has a   bond angle of ________ degrees.

Accepted Answer

Question 4

What is the bond angle in the following molecular model of I3-?

Accepted Answer

A) less than 120° 
B) 120° 
C) less than 180° but greater than 120° 
D) 180° 
A) less than 120° 
B) 120° 
C) less than 180° but greater than 120° 
D) 180°

Question 5

Which statement concerning any homonuclear diatomic molecule and its 1- ion must be true?

Accepted Answer

A) X2 must be more stable than X2-. 
B) X2 must be less stable than X2-. 
C) X2- must be paramagnetic and X2 must be diamagnetic. 
D) X2- must be paramagnetic and X2 may be paramagnetic or diamagnetic. 
A) X2 must be more stable than X2-. 
B) X2 must be less stable than X2-. 
C) X2- must be paramagnetic and X2 must be diamagnetic. 
D) X2- must be paramagnetic and X2 may be paramagnetic or diamagnetic.

Question 6

Compare the energies of molecular orbitals of homonuclear diatomic molecules with the energies of the atomic orbitals with which they correlate.

Accepted Answer

A) Both bonding and antibonding molecular orbitals lie lower in energy than the atomic orbitals. 
B) Bonding orbitals are lower and antibonding orbitals are higher in energy than the atomic orbitals. 
C) Bonding orbitals are higher and antibonding orbitals are lower in energy than the atomic orbitals. 
D) Both bonding and antibonding molecular orbitals are higher in energy than the atomic orbitals. 
A) Both bonding and antibonding molecular orbitals lie lower in energy than the atomic orbitals. 
B) Bonding orbitals are lower and antibonding orbitals are higher in energy than the atomic orbitals. 
C) Bonding orbitals are higher and antibonding orbitals are lower in energy than the atomic orbitals. 
D) Both bonding and antibonding molecular orbitals are higher in energy than the atomic orbitals.

Question 7

Which covalent bond is the most polar?

Accepted Answer

A) Cl-F 
B) B-F 
C) O-F 
D) F-F 
A) Cl-F 
B) B-F 
C) O-F 
D) F-F

Question 8

The molecular geometry of OCCl2 is ________.

Accepted Answer

Question 9

Identify the set of hybrid orbitals shown below.

Accepted Answer

A) sp 
B) sp2 
C) sp3 
D) sp4 
A) sp 
B) sp2 
C) sp3 
D) sp4

Question 10

What is the molecular geometry of CH3-?

Accepted Answer

A) T-shaped 
B) tetrahedral 
C) trigonal planar 
D) trigonal pyramidal 
A) T-shaped 
B) tetrahedral 
C) trigonal planar 
D) trigonal pyramidal

Question 11

Which of the following should be nonplanar?

Accepted Answer

A) only I 
B) only II 
C) only III 
D) I and III 
A) only I 
B) only II 
C) only III 
D) I and III

Question 12

What is the bond angle in the following molecular model of NO2-?

Accepted Answer

A) less than 109.5° 
B) 109.5° 
C) less than 120° but greater than 109.5° 
D) 120° 
A) less than 109.5° 
B) 109.5° 
C) less than 120° but greater than 109.5° 
D) 120°

Question 13

What are the bond angles in the following molecular model of TeF5-?

Accepted Answer

A) some less than 90° and some less than 120° but greater than 90° 
B) 90° and 120° 
C) some less than 90° and some less than 180° but greater than 120° 
D) 90° and 180° 
A) some less than 90° and some less than 120° but greater than 90° 
B) 90° and 120° 
C) some less than 90° and some less than 180° but greater than 120° 
D) 90° and 180°

Question 14

What are the bond angles in the following molecular model of ICl4-?

Accepted Answer

A) some less than 90° and some less than 120° but greater than 90° 
B) 90° 
C) some less than 90° and some less than 180° but greater than 90° 
D) 90° and 180° 
A) some less than 90° and some less than 120° but greater than 90° 
B) 90° 
C) some less than 90° and some less than 180° but greater than 90° 
D) 90° and 180°

Question 15

Which drawing best represents hydrogen bonding?

Accepted Answer

A) drawing (1) 
B) drawing (2) 
C) drawing (3) 
D) drawing (4) 
A) drawing (1) 
B) drawing (2) 
C) drawing (3) 
D) drawing (4)

Question 16

Which of the following exhibits ion-dipole forces?

Accepted Answer

A) KBr(s) 
B) NaF(aq) 
C) Ag(s) 
D) Cl2(g) 
A) KBr(s) 
B) NaF(aq) 
C) Ag(s) 
D) Cl2(g)

Question 17

Electrostatic potential maps use color to portray the calculated electron distribution in a molecule.Atoms that are electron poor and carry a δ+ charge are shown in blue.Atoms that are electron rich and carry a δ- charge are shown in red.Atoms with little or no charge are shown in green.The electrostatic potential map of CH3Li below should show

Accepted Answer

A) C blue and Li red. 
B) C blue and Li green. 
C) C green and Li blue. 
D) C red and Li blue. 
A) C blue and Li red. 
B) C blue and Li green. 
C) C green and Li blue. 
D) C red and Li blue.

Question 18

What is the bond angle in the following molecular model of SO2?

Accepted Answer

A) less than 109.5° 
B) 109.5° 
C) less than 120° but greater than 109.5° 
D) 120° 
A) less than 109.5° 
B) 109.5° 
C) less than 120° but greater than 109.5° 
D) 120°

Question 19

Which of the following molecules does not have a dipole moment?

Accepted Answer

A) CBr2=CBr2 
B) NCl3 
C) CH3NH2 
D) HCl 
A) CBr2=CBr2 
B) NCl3 
C) CH3NH2 
D) HCl

Question 20

Which is paramagnetic?

Accepted Answer

A) N22+ 
B) N22- 
C) O22+ 
D) O22- 
A) N22+ 
B) N22- 
C) O22+ 
D) O22-

Exam 8: Covalent Compounds: Bonding Theories and Molecular Structure

What is geometry around the carbon atom labeled C3?

Which of the following molecules does not have a dipole moment?

Pt(NH3)2Cl2 is square planar.The isomer of Pt(NH3)2Cl2 that has a non-zero dipole moment has a bond angle of ________ degrees.

What is the bond angle in the following molecular model of I3-?

Which statement concerning any homonuclear diatomic molecule and its 1- ion must be true?

Compare the energies of molecular orbitals of homonuclear diatomic molecules with the energies of the atomic orbitals with which they correlate.

Which covalent bond is the most polar?

The molecular geometry of OCCl2 is ________.

Identify the set of hybrid orbitals shown below.

What is the molecular geometry of CH3-?

Which of the following should be nonplanar?

What is the bond angle in the following molecular model of NO2-?

What are the bond angles in the following molecular model of TeF5-?

What are the bond angles in the following molecular model of ICl4-?

Which drawing best represents hydrogen bonding?

Which of the following exhibits ion-dipole forces?

What is the bond angle in the following molecular model of SO2?

Which of the following molecules does not have a dipole moment?

Which is paramagnetic?

Chemical Tools: Experimentation and Measurement

Atoms, molecules, and Ions

Mass Relationships in Chemical Reactions

Reactions in Aqueous Solutions

Periodicity and the Electronic Structure of Atoms

Ionic Compounds: Periodic Trends and Bonding

Covalent Bonding and Electron-Dot Structures

Thermochemistry: Chemical Energy

Gases: Their Properties and Behavior

Liquids, solids, and Phase Changes

Solutions and Their Properties

Chemical Kinetics

Chemical Equilibrium

Aqueous Equilibria: Acids and Bases

Applications of Aqueous Equilibria

Thermodynamics: Entropy, free Energy, and Equilibrium

Electrochemistry

Nuclear Chemistry

Transition Elements and Coordination Chemistry

Metals and Solid-State Materials

The Main-Group Elements

Connections to Organic and Biological Chemistry

Filters

What is geometry around the carbon atom labeled C₃?

Pt(NH₃)₂Cl₂ is square planar.The isomer of Pt(NH₃)₂Cl₂ that has a non-zero dipole moment has a bond angle of ________ degrees.

What is the bond angle in the following molecular model of I₃^-?

The molecular geometry of OCCl₂ is ________.

What is the molecular geometry of CH₃^-?

What is the bond angle in the following molecular model of NO₂^-?

What are the bond angles in the following molecular model of TeF₅^-?

What are the bond angles in the following molecular model of ICl₄^-?

What is the bond angle in the following molecular model of SO₂?