Question 1

How many sigma bonds are present in the following compound?

Accepted Answer

A)  20 
B)  22 
C)  24 
D)  25 
E)  27 
A)  20 
B)  22 
C)  24 
D)  25 
E)  27

Question 2

What is the hybridization state of the nitrogen atom in the following compound?

Accepted Answer

A)  sp 
B)  sp2 
C)  sp3 
D)  sp3d 
E)  s2p 
A)  sp 
B)  sp2 
C)  sp3 
D)  sp3d 
E)  s2p

Question 3

The following ground state electron configuration violates ____.

Accepted Answer

A)  the Aufbau principle 
B)  the Pauli Exclusion principle 
C)  Hund's Rule 
D)  Heisenberg's Uncertainty principle 
E)  None of these. 
A)  the Aufbau principle 
B)  the Pauli Exclusion principle 
C)  Hund's Rule 
D)  Heisenberg's Uncertainty principle 
E)  None of these.

Question 4

What is the correct Lewis structure for SCN- including the formal charges, if any?

Accepted Answer

A)  I 
B)  II 
C)  III 
D)  IV 
E)  V 
A)  I 
B)  II 
C)  III 
D)  IV 
E)  V

Question 5

Which of the following structures have carbon with sp2 hybridization state?

Accepted Answer

A)  I and II 
B)  III and IV 
C)  I and III 
D)  II and IV 
E)  I and IV 
A)  I and II 
B)  III and IV 
C)  I and III 
D)  II and IV 
E)  I and IV

Question 6

Which of the following compounds have the lowest boiling point?

Accepted Answer

A)  I 
B)  II 
C)  III 
D)  IV 
E)  II and IV 
A)  I 
B)  II 
C)  III 
D)  IV 
E)  II and IV

Question 7

Which of the following compounds have trigonal planar molecular geometry?

Accepted Answer

A)  I, II and III 
B)  II and III 
C)  III and V 
D)  V only 
E)  All of these 
A)  I, II and III 
B)  II and III 
C)  III and V 
D)  V only 
E)  All of these

Question 8

Which intermolecular force is primarily responsible for base pairing, and stability, of the double helix in DNA?

Accepted Answer

A)  ion-dipole interactions 
B)  London dispersion forces 
C)  dipole-dipole interactions 
D)  hydrogen bonding 
E)  covalent bonding 
A)  ion-dipole interactions 
B)  London dispersion forces 
C)  dipole-dipole interactions 
D)  hydrogen bonding 
E)  covalent bonding

Question 9

What is the hybridization state of the indicated atoms in the following compound?

Accepted Answer

A)  I - sp ; II - sp2 ; III - sp3 ; IV - sp2 
B)  I - sp2 ; II - sp ; III - sp2 ; IV - sp3 
C)  I - sp3 ; II - sp2 ; III - sp ; IV - sp2 
D)  I - sp2 ; II - sp3 ; III - sp2 ; IV - sp 
E)  I - sp2 ; II - sp2 ; III - sp2 ; IV - sp3 
A)  I - sp ; II - sp2 ; III - sp3 ; IV - sp2 
B)  I - sp2 ; II - sp ; III - sp2 ; IV - sp3 
C)  I - sp3 ; II - sp2 ; III - sp ; IV - sp2 
D)  I - sp2 ; II - sp3 ; III - sp2 ; IV - sp 
E)  I - sp2 ; II - sp2 ; III - sp2 ; IV - sp3

Question 10

Which of the following covalent bonds has the largest dipole moment?

Accepted Answer

A)  C-C 
B)  C-H 
C)  C-O 
D)  N-H 
E)  H-F 
A)  C-C 
B)  C-H 
C)  C-O 
D)  N-H 
E)  H-F

Question 11

Which of the following statement is incorrect, when the 1s atomic orbitals of two hydrogen atoms results in constructive interference?

Accepted Answer

A)  a sigma bonding molecular orbital is formed 
B)  the bonding molecular orbital formed is lower in energy than the 1s atomic orbital 
C)  the bonding molecular orbital formed has a node between the atoms 
D)  the bonding molecular orbital formed has circular symmetry 
E)  a maximum of two electrons may occupy the bonding molecular orbital 
A)  a sigma bonding molecular orbital is formed 
B)  the bonding molecular orbital formed is lower in energy than the 1s atomic orbital 
C)  the bonding molecular orbital formed has a node between the atoms 
D)  the bonding molecular orbital formed has circular symmetry 
E)  a maximum of two electrons may occupy the bonding molecular orbital

Question 12

Interaction of the following two atomic orbitals results in what kind of molecular orbital, in the orientation shown?

Accepted Answer

sigma bond

Question 13

For NaSCH3, identify each bond as polar covalent, nonpolar covalent or ionic.

Accepted Answer

Question 14

What is the letter designation for the following atomic orbital?

Accepted Answer

A)  s 
B)  p 
C)  d 
D)  f 
E)  g 
A)  s 
B)  p 
C)  d 
D)  f 
E)  g

Question 15

What is the approximate bond angle around the indicated carbon atom?

Accepted Answer

A)  600 
B)  900 
C)  109.50 
D)  1200 
E)  1800 
A)  600 
B)  900 
C)  109.50 
D)  1200 
E)  1800

Question 16

The electronegativity of elements on the periodic table tends to increase_______.

Accepted Answer

A)  from left to right, top to bottom 
B)  from right to left, bottom to top 
C)  from left to right, bottom to top 
D)  from right to left, top to bottom 
E)  from upper right to lower left 
A)  from left to right, top to bottom 
B)  from right to left, bottom to top 
C)  from left to right, bottom to top 
D)  from right to left, top to bottom 
E)  from upper right to lower left

Question 17

What are the formal charges on boron and oxygen in the following structure?

Accepted Answer

A)  B = 1-, O = 1- 
B)  B = 1-, O = 1+ 
C)  B = 1+, O = 1+ 
D)  B = 1+, O = 1- 
E)  B = 1-, O = 0 
A)  B = 1-, O = 1- 
B)  B = 1-, O = 1+ 
C)  B = 1+, O = 1+ 
D)  B = 1+, O = 1- 
E)  B = 1-, O = 0

Question 18

Which of the following structures have a 1- formal charge on the sulfur atom?

Accepted Answer

A)  I 
B)  II 
C)  III 
D)  IV 
E)  V 
A)  I 
B)  II 
C)  III 
D)  IV 
E)  V

Question 19

According to molecular orbital theory the highest energy molecular orbital that is occupied with an electron is referred to as _____.

Accepted Answer

A)  degenerate 
B)  antibonding 
C)  the LCAO 
D)  the LUMO 
E)  the HOMO 
A)  degenerate 
B)  antibonding 
C)  the LCAO 
D)  the LUMO 
E)  the HOMO

Question 20

What is the hybridization state of the carbon (I) atom in the following compound?

Accepted Answer

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

Exam 1: A Review of General Chemistry: Electrons, Bonds, and Molecular Properties

How many sigma bonds are present in the following compound?

What is the hybridization state of the nitrogen atom in the following compound?

The following ground state electron configuration violates ____.

What is the correct Lewis structure for SCN- including the formal charges, if any?

Which of the following structures have carbon with sp2 hybridization state?

Which of the following compounds have the lowest boiling point?

Which of the following compounds have trigonal planar molecular geometry?

Which intermolecular force is primarily responsible for base pairing, and stability, of the double helix in DNA?

What is the hybridization state of the indicated atoms in the following compound?

Which of the following covalent bonds has the largest dipole moment?

Which of the following statement is incorrect, when the 1s atomic orbitals of two hydrogen atoms results in constructive interference?

Interaction of the following two atomic orbitals results in what kind of molecular orbital, in the orientation shown?

For NaSCH3, identify each bond as polar covalent, nonpolar covalent or ionic.

What is the letter designation for the following atomic orbital?

What is the approximate bond angle around the indicated carbon atom?

The electronegativity of elements on the periodic table tends to increase_______.

What are the formal charges on boron and oxygen in the following structure?

Which of the following structures have a 1- formal charge on the sulfur atom?

According to molecular orbital theory the highest energy molecular orbital that is occupied with an electron is referred to as _____.

What is the hybridization state of the carbon (I) atom in the following compound?

Molecular Representations

Acids and Bases

Alkanes and Cycloalkanes

Stereoisomerism

Chemical Reactivity and Mechanisms

Alkyl Halides: Nucleophilic Substitution and Elimination Reactions

Addition Reactions of Alkenes

Alkynes

Radical Reactions

Synthesis

Alcohols and Phenols

Ethers and Epoxides; Thiols and Sulfides

Infrared Spectroscopy and Mass Spectrometry

Nuclear Magnetic Resonance Spectroscopy

Conjugated Pi Systems and Pericyclic Reactions

Aromatic Compounds

Aromatic Substitution Reactions

Aldehydes and Ketones

Carboxylic Acids and Their Derivatives

Alpha Carbon Chemistry: Enols and Enolates

Amines

Introduction to Organometallic Compounds

Carbohydrates

Amino Acids, Peptides, and Proteins

Lipids

Synthetic Polymers

Filters

What is the correct Lewis structure for SCN^- including the formal charges, if any?

Which of the following structures have carbon with sp² hybridization state?

For NaSCH₃, identify each bond as polar covalent, nonpolar covalent or ionic.