Question 1

According to the VSEPR theory, which one of the following species should be linear?

Accepted Answer

A) H2S 
B) HCN 
C) BF3 
D) H2CO 
E) SO2 
A) H2S 
B) HCN 
C) BF3 
D) H2CO 
E) SO2

Question 2

Which of the following molecules have the same geometries?

Accepted Answer

A) SF4 and CH4 
B) CO2 and H2O 
C) CO2 and BeH2 
D) N2O and NO2 
A) SF4 and CH4 
B) CO2 and H2O 
C) CO2 and BeH2 
D) N2O and NO2

Question 3

What bond angles are predicted by VSEPR theory for the F -P -F bonds in PF5?

Accepted Answer

Question 4

The number of pi bonds in the molecule below is

Accepted Answer

A) 1 
B) 2 
C) 3 
D) 5 
E) 9 
A) 1 
B) 2 
C) 3 
D) 5 
E) 9

Question 5

What is the hybridization of the iodine atom in the IF5 molecule?

Accepted Answer

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

Question 6

Give the number of lone pairs around the central atom and the geometry of the ion IBr2-.

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 7

The geometry of the ClF3 molecule is best described as:

Accepted Answer

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

Question 8

N,N-diethyl-m-tolumide (DEET)is the active ingredient in many mosquito repellents.What is the hybridization state of carbon indicated by the arrow in the structure of DEET shown below?

Accepted Answer

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

Question 9

Give the number of lone pairs around the central atom and the molecular geometry of SCl2.

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 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

In which one of the following molecules 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 12

Explain why CO2 is nonpolar, but OCS is polar.

Accepted Answer

In CO₂ the two bond moments point in oppo

Question 13

Give the number of lone pairs around the central atom and the molecular geometry of SeF4.

Accepted Answer

A) 0 lone pairs, tetrahedral 
B) 1 lone pair, distorted tetrahedron (seesaw) 
C) 1 lone pair, square pyramidal 
D) 1 lone pair, tetrahedral 
E) 2 lone pairs, square planar 
A) 0 lone pairs, tetrahedral 
B) 1 lone pair, distorted tetrahedron (seesaw) 
C) 1 lone pair, square pyramidal 
D) 1 lone pair, tetrahedral 
E) 2 lone pairs, square planar

Question 14

Predict the geometry around the central atom in XeO4.

Accepted Answer

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

Question 15

The F - S - F bond angles in SF6 are

Accepted Answer

A) 90° and 180° 
B) 109.5° 
C) 120° 
D) 180° 
E) 90° and 120° 
A) 90° and 180° 
B) 109.5° 
C) 120° 
D) 180° 
E) 90° and 120°

Question 16

Ozone (O3)is an allotropic form of oxygen. Use VSEPR theory to predict the shape of the ozone molecule.

Accepted Answer

Question 17

Consider the species Cl2+, Cl2, and Cl2-. Which of these species will be paramagnetic?

Accepted Answer

A) only Cl2 
B) Cl2+ and Cl2 
C) Cl2 and Cl2- 
D) Cl2+ and Cl2- 
E) all three are paramagnetic 
A) only Cl2 
B) Cl2+ and Cl2 
C) Cl2 and Cl2- 
D) Cl2+ and Cl2- 
E) all three are paramagnetic

Question 18

The F -Cl -F bond angles in ClF3 are expected to be approximately

Accepted Answer

A) 90° only. 
B) 109.5° only. 
C) 120° only. 
D) 180° only. 
E) 90° and 180°. 
A) 90° only. 
B) 109.5° only. 
C) 120° only. 
D) 180° only. 
E) 90° and 180°.

Question 19

According to VSEPR theory, the geometry of the PH3 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.

Question 20

Indicate the type of hybrid orbitals used by the central atom in CCl4.

Accepted Answer

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

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

According to the VSEPR theory, which one of the following species should be linear?

Which of the following molecules have the same geometries?

What bond angles are predicted by VSEPR theory for the F -P -F bonds in PF5?

The number of pi bonds in the molecule below is

What is the hybridization of the iodine atom in the IF5 molecule?

Give the number of lone pairs around the central atom and the geometry of the ion IBr2-.

The geometry of the ClF3 molecule is best described as:

N,N-diethyl-m-tolumide (DEET)is the active ingredient in many mosquito repellents.What is the hybridization state of carbon indicated by the arrow in the structure of DEET shown below?

Give the number of lone pairs around the central atom and the molecular geometry of SCl2.

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

In which one of the following molecules is the central atom sp2 hybridized?

Explain why CO2 is nonpolar, but OCS is polar.

Give the number of lone pairs around the central atom and the molecular geometry of SeF4.

Predict the geometry around the central atom in XeO4.

The F - S - F bond angles in SF6 are

Ozone (O3)is an allotropic form of oxygen. Use VSEPR theory to predict the shape of the ozone molecule.

Consider the species Cl2+, Cl2, and Cl2-. Which of these species will be paramagnetic?

The F -Cl -F bond angles in ClF3 are expected to be approximately

According to VSEPR theory, the geometry of the PH3 molecule is best described as

Indicate the type of hybrid orbitals used by the central atom in CCl4.

Chemistry: The Study of Change

Atoms, Molecules, and Ions

Mass Relationships in Chemical Reactions

Reactions in Aqueous Solution

Gases

Thermo-Chemistry

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

Chemistry in the Atmosphere

Entropy, Free Energy, and Equilibrium

Electrochemistry

Metallurgy and the Chemistry of Metals

Nonmetallic Elements and Their Compounds

Transition Metal Chemistry and Coordination Compounds

Nuclear Chemistry

Organic Chemistry

Synthetic and Natural Organic Polymers

Filters

What bond angles are predicted by VSEPR theory for the F -P -F bonds in PF₅?

What is the hybridization of the iodine atom in the IF₅ molecule?

Give the number of lone pairs around the central atom and the geometry of the ion IBr₂^-.

The geometry of the ClF₃ molecule is best described as:

Give the number of lone pairs around the central atom and the molecular geometry of SCl₂.

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

In which one of the following molecules is the central atom sp² hybridized?

Explain why CO₂ is nonpolar, but OCS is polar.

Give the number of lone pairs around the central atom and the molecular geometry of SeF₄.

Predict the geometry around the central atom in XeO₄.

The F - S - F bond angles in SF₆ are

Ozone (O₃)is an allotropic form of oxygen. Use VSEPR theory to predict the shape of the ozone molecule.

Consider the species Cl₂⁺, Cl₂, and Cl₂^-. Which of these species will be paramagnetic?

The F -Cl -F bond angles in ClF₃ are expected to be approximately

According to VSEPR theory, the geometry of the PH₃ molecule is best described as

Indicate the type of hybrid orbitals used by the central atom in CCl₄.