Question 1

Hydrogen sulfide is considered the "rotten egg" gas, and has a structure much like water. Which of the following is its Lewis structure?

Accepted Answer

A)   
B)   
C)   
D)    B

Question 2

Which of the following is a tenet of valence bond theory?

Accepted Answer

A)  Electrons must not be shared.
B)  Orbitals must overlap.
C)  Orbitals must not overlap.
D)  Electrons must remain localized. B

Question 3

The methane molecule can best be described in what manner, when referring to polarity?

Accepted Answer

A)  A nonpolar molecule made from polar covalent bonds
B)  A nonpolar molecule made from non-polar covalent bonds
C)  A polar molecule made from polar covalent bonds
D)  A polar molecule made from non-polar covalent bonds A

Question 4

What is often the importance of one stereoisomer of a drug versus the other when it comes to receptors for the drug?

Accepted Answer

The answer of What is often the importance of one...

Question 5

The simplest covalently bonded molecule is hydrogen. Which is the correct Lewis structure?

Accepted Answer

A)  H2
B)  H.H
C)  H=H
D)  H-H

Question 6

What is the correct Lewis structure for ethyne, C2H2, also known by the common name acetylene?

Accepted Answer

A)  H-H-C-C
B)  H-C-C-H
C)  H-C=C-H
D)  H-C≡C-H

Question 7

How do neurons communicate with each other?

Accepted Answer

The answer of How do neurons communicate with each other?...

Question 8

What is the electronegativity difference in the C-O bond?

Accepted Answer

A)  1.0
B)  2.5
C)  3.5
D)  0

Question 9

What problem is associated with the high stability of polymers?

Accepted Answer

A)  They are hard to extract from their sources.
B)  They break down very slowly in landfills.
C)  They react very slowly during formation.
D)  There is none, as the high stability is a strength.

Question 10

Which of the following solvents is the most polar: benzene, toluene, or water?

Accepted Answer

The answer of Which of the following solvents is the...

Question 11

What difference in molecular structure makes cocaine more polar than crack cocaine?

Accepted Answer

A)  Cocaine is the ionic form, crack the non-ionic form, of the same drug.
B)  Cocaine is the non-ionic form, crack the ionic form, of the same drug.
C)  Cocaine has an added methyl group that crack does not.
D)  Crack has an added methyl group that cocaine does not.

Question 12

Amphetamines fall into what class of organic compounds?

Accepted Answer

A)  Ketones
B)  Ethers
C)  Amines
D)  Narcotics

Question 13

What do the dots placed around an elemental symbol mean in drawing Lewis structures?

Accepted Answer

The answer of What do the dots placed around an...

Question 14

How many carbon atoms must be in the simplest alkene?

Accepted Answer

A)  0
B)  1
C)  2
D)  3

Question 15

How is ethane best represented by a Lewis structure?

Accepted Answer

A)   
B)   
C)   
D)

Question 16

Which is the correct Lewis dot structure for chlorine?

Accepted Answer

A)   
B)   
C)   
D)

Question 17

What best describes the Cl-Cl bond?

Accepted Answer

A)  Non-polar covalent
B)  Covalent
C)  Polar covalent
D)  Ionic

Question 18

What do the valence shells of all the noble gas elements have in common?

Accepted Answer

A)  A large size for its row on the periodic table
B)  A high ability to lose electrons
C)  A filled electron shell
D)  A high affinity for further electrons

Question 19

Draw for yourself the Lewis structure of ethane, C2H4, also called ethylene. How many double bonds does it have?

Accepted Answer

A)  None
B)  1
C)  2
D)  3

Question 20

Which of the following represent the best resonance structures for SO2?

Accepted Answer

A)   2? 
A)     
B)     
C)     
D)    " class="answers-bank-image d-inline" rel="preload" >
B)   2? 
A)     
B)     
C)     
D)    " class="answers-bank-image d-inline" rel="preload" >
C)   2? 
A)     
B)     
C)     
D)    " class="answers-bank-image d-inline" rel="preload" >
D)   2? 
A)     
B)     
C)     
D)    " class="answers-bank-image d-inline" rel="preload" >

Exam 8: Organic Chemistry and Polymers