Question 1

The curved arrows in the resonance structure for the acetate ion shown below   indicate the following alternative resonance structure for the acetate ion.

Accepted Answer

A) True 
 B)False

Question 2

The hybridization on the numbered carbon atoms in the following compound would be Carbon 1 sp3 and Carbon 2 sp2.

Accepted Answer

A) True 
 B)False

Question 3

Which atomic orbitals overlap to form the carbon-carbon $\sigma$ molecular bonding orbital of ethyne, HC$\equiv$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 4

Which of the following statements is not true about the carbonate anion, CO32-?

Accepted Answer

A) All of the oxygen atoms bear the same amount of charge 
B) All of the carbon-oxygen bonds are the same length 
C) The carbon atom bears the negative charge 
D) It is basic 
A) All of the oxygen atoms bear the same amount of charge 
B) All of the carbon-oxygen bonds are the same length 
C) The carbon atom bears the negative charge 
D) It is basic

Question 5

Draw bond-line structures of all of the aldehydes that have the formula C5H10O.

Accepted Answer

Question 6

Which of the following bonds is the most polar?

Accepted Answer

A) O-H 
B) C-H 
C) C-C 
D) H-H 
A) O-H 
B) C-H 
C) C-C 
D) H-H

Question 7

How many electrons are there in the valence shell of the carbon atom of a methyl cation, CH3+?

Accepted Answer

A) 4 
B) 5 
C) 6 
D) 7 
A) 4 
B) 5 
C) 6 
D) 7

Question 8

Which of the following bonds has the smallest dipole moment?

Accepted Answer

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

Question 9

Which of the following is an carboxylic ester?

Accepted Answer

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

Question 10

Provide a neatly drawn figure to show the atomic orbitals that overlap to form each of the bonds in ethyne (acetylene, HC$\equiv$CH). Label each bond (e.g., C-H $\sigma$bond) and indicate which atomic orbitals contribute to this bond (e.g., C 2sp3 + H 1s).

Accepted Answer

Question 11

Which atomic orbitals overlap to form the C=O bond of acetone, (CH3)2C=O?

Accepted Answer

A) C 2sp3 + O 2sp2 
B) C 2sp2 + O 2p 
C) C 2sp2 + O 2sp2 
D) C 2sp3 + O 2sp 
A) C 2sp3 + O 2sp2 
B) C 2sp2 + O 2p 
C) C 2sp2 + O 2sp2 
D) C 2sp3 + O 2sp

Question 12

What is the approximate C-C-C bond angle in propyne, HC$\equiv$CCH3?

Accepted Answer

A) 90$\circ$ 
B) 109$\circ$ 
C) 120$\circ$ 
D) 180$\circ$ 
A) 90$\circ$ 
B) 109$\circ$ 
C) 120$\circ$ 
D) 180$\circ$

Question 13

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 14

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 15

Which of the following elements has the highest electronegativity?

Accepted Answer

A) C 
B) P 
C) Si 
D) Cl 
A) C 
B) P 
C) Si 
D) Cl

Question 16

Provide a neatly drawn figure to show the atomic orbitals that overlap to form each of the bonds in ethene (ethylene, H2C=CH2). Label each bond (e.g., C-H $\sigma$ bond) and indicate which atomic orbitals contribute to this bond (e.g., C 2sp3 + H 1s).

Accepted Answer

Question 17

Which of the following species possesses a formal charge?

Accepted Answer

A) CCl4 
B) SiCl4 
C) AlCl4 
D) PCl3 
A) CCl4 
B) SiCl4 
C) AlCl4 
D) PCl3

Question 18

Which of the following is a primary (1$\circ$) alcohol?

Accepted Answer

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

Question 19

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

Accepted Answer

A) Each resonance structure is in rapid equilibrium with all of the other structures 
B) The resonance structures may have different energies 
C) All resonance structures must have the same arrangement of atoms 
D) All resonance structures must have the same number of electrons 
A) Each resonance structure is in rapid equilibrium with all of the other structures 
B) The resonance structures may have different energies 
C) All resonance structures must have the same arrangement of atoms 
D) All resonance structures must have the same number of electrons

Question 20

What is the approximate value of the length of the C=C bond in ethane, CH2=CH2?

Accepted Answer

A) 121 pm 
B) 134 pm 
C) 142 pm 
D) 154 pm 
A) 121 pm 
B) 134 pm 
C) 142 pm 
D) 154 pm

Exam 1: Covalent Bonding and Shapes of Molecules

The curved arrows in the resonance structure for the acetate ion shown below indicate the following alternative resonance structure for the acetate ion.

The hybridization on the numbered carbon atoms in the following compound would be Carbon 1 sp3 and Carbon 2 sp2.

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

Which of the following statements is not true about the carbonate anion, CO32-?

Draw bond-line structures of all of the aldehydes that have the formula C5H10O.

Which of the following bonds is the most polar?

How many electrons are there in the valence shell of the carbon atom of a methyl cation, CH3+?

Which of the following bonds has the smallest dipole moment?

Which of the following is an carboxylic ester?

Provide a neatly drawn figure to show the atomic orbitals that overlap to form each of the bonds in ethyne (acetylene, HC ≡\equiv≡ CH). Label each bond (e.g., C-H σ\sigmaσ bond) and indicate which atomic orbitals contribute to this bond (e.g., C 2sp3 + H 1s).

Which atomic orbitals overlap to form the C=O bond of acetone, (CH3)2C=O?

What is the approximate C-C-C bond angle in propyne, HC ≡\equiv≡ CCH3?

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

Which of the following compounds is a ketone?

Which of the following elements has the highest electronegativity?

Provide a neatly drawn figure to show the atomic orbitals that overlap to form each of the bonds in ethene (ethylene, H2C=CH2). Label each bond (e.g., C-H σ\sigmaσ bond) and indicate which atomic orbitals contribute to this bond (e.g., C 2sp3 + H 1s).

Which of the following species possesses a formal charge?

Which of the following is a primary (1 ∘\circ∘ ) alcohol?

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

What is the approximate value of the length of the C=C bond in ethane, CH2=CH2?

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

The hybridization on the numbered carbon atoms in the following compound would be Carbon 1 sp³ and Carbon 2 sp².

Which atomic orbitals overlap to form the carbon-carbon $\sigma$ molecular bonding orbital of ethyne, HC $\equiv$ CH?

Which of the following statements is not true about the carbonate anion, CO₃²^-?

Draw bond-line structures of all of the aldehydes that have the formula C₅H₁₀O.

How many electrons are there in the valence shell of the carbon atom of a methyl cation, CH₃⁺?

Provide a neatly drawn figure to show the atomic orbitals that overlap to form each of the bonds in ethyne (acetylene, HC $\equiv$ CH). Label each bond (e.g., C-H $\sigma$ bond) and indicate which atomic orbitals contribute to this bond (e.g., C 2sp³ + H 1s).

Which atomic orbitals overlap to form the C=O bond of acetone, (CH₃)₂C=O?

What is the approximate C-C-C bond angle in propyne, HC $\equiv$ CCH₃?

Provide a neatly drawn figure to show the atomic orbitals that overlap to form each of the bonds in ethene (ethylene, H₂C=CH₂). Label each bond (e.g., C-H $\sigma$ bond) and indicate which atomic orbitals contribute to this bond (e.g., C 2sp³ + H 1s).

Which of the following is a primary (1^$\circ$) alcohol? $Which of the following is a primary (1<sup> \circ </sup>) alcohol?$

What is the approximate value of the length of the C=C bond in ethane, CH₂=CH₂?