Question 1

The bond angles in CO32- are expected to be

Accepted Answer

A) a little less than 109.5°. 
B) 109.5°. 
C) a little less than 120°. 
D) 120°. 
E) a little more than 120°. 
A) a little less than 109.5°. 
B) 109.5°. 
C) a little less than 120°. 
D) 120°. 
E) a little more than 120°.

Question 2

According to VSEPR theory, which of the following triatomic ions should be linear: N3-, I3-, NO2-, ClO2-, SCN-.

Accepted Answer

N₃^-, I₃^-, and

Question 3

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 4

Give the number of lone pairs around the central atom and the geometry of the ion NO2-.

Accepted Answer

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

Question 5

Which should have the longer bond, O2 or O2+?

Accepted Answer

Question 6

Which of the following species has the largest dipole moment (i.e., is the most polar)?

Accepted Answer

A) H2 
B) H2O 
C) H2S 
D) H2Se 
E) CH4 
A) H2 
B) H2O 
C) H2S 
D) H2Se 
E) CH4

Question 7

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

Accepted Answer

Question 8

A molecule with polar bonds must be a polar molecule in all cases.

Accepted Answer

A) True 
 B)False

Question 9

Which of the following molecules is polar?
A.CH3OH
B.H2O
C.CH3OCH3

Accepted Answer

All of the

Question 10

The geometry of the hybrid orbitals about a central atom with sp3d hybridization is:

Accepted Answer

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

Question 11

N,N-diethyl-m-tolumide (DEET)is the active ingredient in many mosquito repellents.What is the hybridization state of the nitrogen atom 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 12

List all of the bond angles present in a molecule with a trigonal bipyramidal geometry.

Accepted Answer

The answer of List all of the bond angles present...

Question 13

Which of the following molecules has polar bonds but is a nonpolar molecule? BF3, CCl4, CO, SF4

Accepted Answer

Question 14

Using periodic trends, arrange the following molecules in order of increasing dipole moment: NH3, PH3, AsH3.

Accepted Answer

Question 15

Which one of the following molecules is nonpolar?

Accepted Answer

A) NH3 
B) OF2 
C) CH3Cl 
D) H2O 
E) BeCl2 
A) NH3 
B) OF2 
C) CH3Cl 
D) H2O 
E) BeCl2

Question 16

According to the VSEPR theory, the actual F -As -F bond angles in the AsF4- ion are predicted to be

Accepted Answer

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

Question 17

According to the VSEPR theory, all of the electron pair-electron pair repulsions about the central atom in PCl3 are of equal magnitude.

Accepted Answer

A) True 
 B)False

Question 18

According to the VSEPR theory, the geometrical structure of PF5 is

Accepted Answer

trigonal b

Question 19

According to the VSEPR theory, the molecular geometry of boron trichloride 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

Predict the geometry around the central atom in PO43-.

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

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

The bond angles in CO32- are expected to be

According to VSEPR theory, which of the following triatomic ions should be linear: N3-, I3-, NO2-, ClO2-, SCN-.

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

Give the number of lone pairs around the central atom and the geometry of the ion NO2-.

Which should have the longer bond, O2 or O2+?

Which of the following species has the largest dipole moment (i.e., is the most polar)?

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

A molecule with polar bonds must be a polar molecule in all cases.

Which of the following molecules is polar? A.CH3OH B.H2O C.CH3OCH3

The geometry of the hybrid orbitals about a central atom with sp3d hybridization is:

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

List all of the bond angles present in a molecule with a trigonal bipyramidal geometry.

Which of the following molecules has polar bonds but is a nonpolar molecule? BF3, CCl4, CO, SF4

Using periodic trends, arrange the following molecules in order of increasing dipole moment: NH3, PH3, AsH3.

Which one of the following molecules is nonpolar?

According to the VSEPR theory, the actual F -As -F bond angles in the AsF4- ion are predicted to be

According to the VSEPR theory, all of the electron pair-electron pair repulsions about the central atom in PCl3 are of equal magnitude.

According to the VSEPR theory, the geometrical structure of PF5 is

According to the VSEPR theory, the molecular geometry of boron trichloride is

Predict the geometry around the central atom in PO43-.

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

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Filters

The bond angles in CO₃^2- are expected to be

According to VSEPR theory, which of the following triatomic ions should be linear: N₃^-, I₃^-, NO₂^-, ClO₂^-, SCN^-.

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

Give the number of lone pairs around the central atom and the geometry of the ion NO₂^-.

Which should have the longer bond, O₂ or O₂⁺?

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

Which of the following molecules is polar? A.CH₃OH B.H₂O C.CH₃OCH₃

The geometry of the hybrid orbitals about a central atom with sp³d hybridization is:

Which of the following molecules has polar bonds but is a nonpolar molecule? BF₃, CCl₄, CO, SF₄

Using periodic trends, arrange the following molecules in order of increasing dipole moment: NH₃, PH₃, AsH₃.

According to the VSEPR theory, the actual F -As -F bond angles in the AsF₄^- ion are predicted to be

According to the VSEPR theory, all of the electron pair-electron pair repulsions about the central atom in PCl₃ are of equal magnitude.

According to the VSEPR theory, the geometrical structure of PF₅ is

Predict the geometry around the central atom in PO₄^3-.