Question 1

Which atomic orbitals overlap to form the carbon-carbon σ molecular bonding orbital of ethyne, HC≡CH?

Accepted Answer

A)  C2p + C2p 
B)  C2sp + C2sp 
C)  C2sp2 + C2sp2 
D)  C2sp3 + C2sp3 
A)  C2p + C2p 
B)  C2sp + C2sp 
C)  C2sp2 + C2sp2 
D)  C2sp3 + C2sp3

Question 2

Circle all of the sp2 hybridized atoms in the following molecular structure.

Accepted Answer

Question 3

In the given ion given, what is the formal charge of nitrogen, carbon, and sulfur, respectively? ​

Accepted Answer

A)  -2, +1, and 0. 
B)  0, -2, and +1. 
C)  -2, 0, and +1. 
D)  +1, 0, and -2. 
A)  -2, +1, and 0. 
B)  0, -2, and +1. 
C)  -2, 0, and +1. 
D)  +1, 0, and -2.

Question 4

Which of the following resonance structures is the least important contributor to the resonance hybrid of the acetate anion, CH3COO−?

Accepted Answer

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

Question 5

Which of the following compounds is a ketone?

Accepted Answer

A)  CH3CH2COOH 
B)  CH3CH2CHO 
C)  CH3CH2CH2OH 
D)  CH3COCH3 
A)  CH3CH2COOH 
B)  CH3CH2CHO 
C)  CH3CH2CH2OH 
D)  CH3COCH3

Question 6

Which of the following best represents the shape of the 2s atomic orbital of carbon?

Accepted Answer

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

Question 7

Overlap of the two atomic orbitals as shown could result in the formation of a π bond.

Accepted Answer

A) True 
 B)False

Question 8

The formal charges in the complex should below are 0 on each H, -1 on N, and +1 on B.

Accepted Answer

A) True 
 B)False

Question 9

Which of the following statements is not true regarding resonance structures?

Accepted Answer

A)  All resonance structures must have the same number of electrons 
B)  Each atom in all of the resonance structures must have a complete shell of valence electrons 
C)  All resonance structures must have the same arrangement of atoms 
D)  All resonance structures must be valid Lewis structures 
A)  All resonance structures must have the same number of electrons 
B)  Each atom in all of the resonance structures must have a complete shell of valence electrons 
C)  All resonance structures must have the same arrangement of atoms 
D)  All resonance structures must be valid Lewis structures

Question 10

Which of the following is a primary amine?

Accepted Answer

A)  CH3CH2NHCH3 
B)  CH3CH2NHCH(CH3)2 
C)  CH3CH2N(CH3)2 
D)  (CH3)3CNH2 
A)  CH3CH2NHCH3 
B)  CH3CH2NHCH(CH3)2 
C)  CH3CH2N(CH3)2 
D)  (CH3)3CNH2

Question 11

What is the approximate H−C−O bond angle in formaldehyde, H2C=O?

Accepted Answer

A)  90° 
B)  109° 
C)  120° 
D)  180° 
A)  90° 
B)  109° 
C)  120° 
D)  180°

Question 12

Which of the following best represents an sp3 hybridized atomic orbital containing the lone pair of electrons of ammonia, NH3?

Accepted Answer

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

Question 13

Which of the following best represents the shape of a 2p atomic orbital of carbon?

Accepted Answer

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

Question 14

What is the ground-state electronic configuration of a nitrogen atom (nitrogen: atomic number 7)?

Accepted Answer

A)  1s22s12p4 
B)  1s22s22p3 
C)  1s12s12p5 
D)  1s22s22p2 
A)  1s22s12p4 
B)  1s22s22p3 
C)  1s12s12p5 
D)  1s22s22p2

Question 15

Which of the circled bonds is the strongest?

Accepted Answer

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

Question 16

What is the molecular formula of aspartame, shown below?

Accepted Answer

The answer of What is the molecular formula of aspartame,...

Question 17

Which of the following compounds is a carboxylic ester?

Accepted Answer

A)  CH3CH2COOH 
B)  CH3CH2OCH3 
C)  CH3CH2COOCH3 
D)  CH3CH2COCH3 
A)  CH3CH2COOH 
B)  CH3CH2OCH3 
C)  CH3CH2COOCH3 
D)  CH3CH2COCH3

Question 18

Which of the following is a tertiary (3°) alcohol? $\begin{array}{cccc}&&\mathrm{OH}\&&|\&\mathrm{OH}&\mathrm{CH}_{3} \mathrm{CCH}_{3}&\mathrm{OCH}_{3}\&|&|&|\
\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{CH}_{2} \mathrm{OH}&\mathrm{CH}_{3} \mathrm{CH}_{2} \mathrm{CHCH}_{3}&\mathrm{CH}_{3}&\mathrm{CH}_{3} \mathrm{CHCH}_{3}\1&2&3&4
\end{array}$

Accepted Answer

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

Exam 1: Covalent Bonding and Shapes of Molecules

Which atomic orbitals overlap to form the carbon-carbon σ molecular bonding orbital of ethyne, HC≡CH?

Circle all of the sp2 hybridized atoms in the following molecular structure.

In the given ion given, what is the formal charge of nitrogen, carbon, and sulfur, respectively? ​

Which of the following resonance structures is the least important contributor to the resonance hybrid of the acetate anion, CH3COO−?

Which of the following compounds is a ketone?

Which of the following best represents the shape of the 2s atomic orbital of carbon?

Overlap of the two atomic orbitals as shown could result in the formation of a π bond.

The formal charges in the complex should below are 0 on each H, -1 on N, and +1 on B.

Which of the following statements is not true regarding resonance structures?

Which of the following is a primary amine?

What is the approximate H−C−O bond angle in formaldehyde, H2C=O?

Which of the following best represents an sp3 hybridized atomic orbital containing the lone pair of electrons of ammonia, NH3?

Which of the following best represents the shape of a 2p atomic orbital of carbon?

What is the ground-state electronic configuration of a nitrogen atom (nitrogen: atomic number 7)?

Which of the circled bonds is the strongest?

What is the molecular formula of aspartame, shown below?

Which of the following compounds is a carboxylic ester?

Which of the following is a tertiary (3°) alcohol? | | | | 1 2 3 4

Alkanes and Cycloalkanes

Stereoisomerism and Chirality

Acids and Bases

Alkenes: Bonding, Nomenclature, and Properties

Reactions of Alkenes

Alkynes

Haloalkanes, Halogenation, and Radical Reactions

Nucleophilic Substitution and Beta-Elimination

Alcohols

Ethers, Epoxides, and Sulfides

Infrared Spectroscopy

Nuclear Magnetic Resonance Spectroscopy

Mass Spectrometry

An Introduction to Organometallic Compounds

Aldehydes and Ketones

Carboxylic Acids

Functional Derivatives of Carboxylic Acids

Enolate Anions and Enamines

Dienes, Conjugated Systems, and Pericyclic Reactions

Benzene and the Concept of Aromaticity

Reactions of Benzene and Its Derivatives

Amines

Catalytic Carbon-Carbon Bond Formation

Carbohydrates

Lipids

Amino Acids and Proteins

Nucleic Acids

Organic Polymer Chemistry

Filters

Circle all of the sp² hybridized atoms in the following molecular structure.

In the given ion given, what is the formal charge of nitrogen, carbon, and sulfur, respectively?

Which of the following resonance structures is the least important contributor to the resonance hybrid of the acetate anion, CH₃COO−?

What is the approximate H−C−O bond angle in formaldehyde, H₂C=O?

Which of the following best represents an sp³ hybridized atomic orbital containing the lone pair of electrons of ammonia, NH₃?