Question 1

Phosphine, PH3, is structurally much like ammonia. Which of the following is the best Lewis structure of phosphine?

Accepted Answer

A)    
B)    
C)    
D)    
A)    
B)    
C)    
D)

Question 2

Any molecule that has a central atom with no lone pairs, and four other, equivalent atoms connected to it, has what shape?

Accepted Answer

A) Square 
B) Triangular 
C) Tetrahedral 
D) Flat 
A) Square 
B) Triangular 
C) Tetrahedral 
D) Flat

Question 3

Of the following solvents: ethanol, water, hexane, which is the most polar?

Accepted Answer

A) Ethanol 
B) Hexane 
C) Water 
D) They are all of roughly equal polarity. 
A) Ethanol 
B) Hexane 
C) Water 
D) They are all of roughly equal polarity.

Question 4

What is an action potential?

Accepted Answer

A) A chemical signal between neurons 
B) An electrical signal through a neuron 
C) An electrical signal between neurons 
D) A chemical signal through a neuron 
A) A chemical signal between neurons 
B) An electrical signal through a neuron 
C) An electrical signal between neurons 
D) A chemical signal through a neuron

Question 5

The compound H2Se smells absolutely horrible (worse than rotten eggs!). What is the electronegativity difference in one of the H-Se bonds?

Accepted Answer

A) 2.4 
B) 2.1 
C) 0.4 
D) 0.3 
A) 2.4 
B) 2.1 
C) 0.4 
D) 0.3

Question 6

How does an immunoassay function?

Accepted Answer

A) By having a small molecule fit into a larger one 
B) By having a small molecule deform as it is fitted into a larger one 
C) By having a large molecule fit into a smaller one 
D) By having a large molecule deform as it is fitted into a smaller one 
A) By having a small molecule fit into a larger one 
B) By having a small molecule deform as it is fitted into a larger one 
C) By having a large molecule fit into a smaller one 
D) By having a large molecule deform as it is fitted into a smaller one

Question 7

After drawing the Lewis structure for the molecule ethyne, C2H2, also known by the common name acetylene, answer this: How many double bonds does it contain?

Accepted Answer

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

Question 8

Draw the cyclic, organic molecule benzene, C6H6. How many resonance structures can exist for it?

Accepted Answer

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

Question 9

What do neurotransmitters do?

Accepted Answer

A) Travel outside the neuron, cross a small gap, and reenter the neuron 
B) Travel through the neuron, cross a small gap, and arrive at the other side of the neuron 
C) Travel outside the neuron, cross a small gap, and arrive at the next neuron 
D) Travel through the neuron, cross a small gap, and reenter the neuron 
A) Travel outside the neuron, cross a small gap, and reenter the neuron 
B) Travel through the neuron, cross a small gap, and arrive at the other side of the neuron 
C) Travel outside the neuron, cross a small gap, and arrive at the next neuron 
D) Travel through the neuron, cross a small gap, and reenter the neuron

Question 10

What is an antibody?

Accepted Answer

A) A molecule specifically produced by the body to attack foreign antigens 
B) An antigen specifically produced by the body to attack foreign antigens 
C) A molecule specifically produced by the body to attack foreign antibiotics 
D) An antigen specifically produced by the body to attack foreign antibiotics 
A) A molecule specifically produced by the body to attack foreign antigens 
B) An antigen specifically produced by the body to attack foreign antigens 
C) A molecule specifically produced by the body to attack foreign antibiotics 
D) An antigen specifically produced by the body to attack foreign antibiotics

Question 11

What elements other than carbon must be in an alkene or an alkyne?

Accepted Answer

A) Hydrogen 
B) Hydrogen and oxygen 
C) Hydrogen and nitrogen 
D) Hydrogen, oxygen, and nitrogen 
A) Hydrogen 
B) Hydrogen and oxygen 
C) Hydrogen and nitrogen 
D) Hydrogen, oxygen, and nitrogen

Question 12

What does valence shell electron pair repulsion theory help determine?

Accepted Answer

A) Atomic geometry 
B) Molecular geometry 
C) Molecular size 
D) Atomic size 
A) Atomic geometry 
B) Molecular geometry 
C) Molecular size 
D) Atomic size

Question 13

How is the N-Br bond described?

Accepted Answer

A) Pure covalent 
B) Polar covalent 
C) Nonpolar covalent 
D) Ionic 
A) Pure covalent 
B) Polar covalent 
C) Nonpolar covalent 
D) Ionic

Question 14

What is the formula for an alkane with ten carbons, decane?

Accepted Answer

A) C10H20 
B) C10H22 
C) C10H24 
D) None of the above. 
A) C10H20 
B) C10H22 
C) C10H24 
D) None of the above.

Question 15

How many hydrogen atoms are directly bonded to the nitrogen atom of a secondary amine?

Accepted Answer

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

Question 16

What is the correct Lewis structure for nitrogen gas?

Accepted Answer

The answer of What is the correct Lewis structure for...

Question 17

What does the term "resonance structure" mean?

Accepted Answer

Two or more Lewis structures,

Question 18

Which is the best Lewis structure for methane?

Accepted Answer

A)    
B)    
C)    
D) None of the above. 
A)    
B)    
C)    
D) None of the above.

Question 19

What must the minimum electronegativity difference be between two atoms to classify a bond as polar covalent?

Accepted Answer

The answer of What must the minimum electronegativity difference be...

Question 20

What is wrong with burning polymers after their use to make energy?

Accepted Answer

A) They are expensive materials, and burning them is a waste of money. 
B) They can emit toxic substances if burned incorrectly. 
C) Most polymers do not burn. 
D) There is no problem with the burning of polymers. 
A) They are expensive materials, and burning them is a waste of money. 
B) They can emit toxic substances if burned incorrectly. 
C) Most polymers do not burn. 
D) There is no problem with the burning of polymers.

Phosphine, PH₃, is structurally much like ammonia. Which of the following is the best Lewis structure of phosphine?

Any molecule that has a central atom with no lone pairs, and four other, equivalent atoms connected to it, has what shape?

Of the following solvents: ethanol, water, hexane, which is the most polar?

What is an action potential?

The compound H₂Se smells absolutely horrible (worse than rotten eggs!). What is the electronegativity difference in one of the H-Se bonds?

How does an immunoassay function?

After drawing the Lewis structure for the molecule ethyne, C₂H₂, also known by the common name acetylene, answer this: How many double bonds does it contain?

Draw the cyclic, organic molecule benzene, C₆H₆. How many resonance structures can exist for it?

What do neurotransmitters do?

What is an antibody?

What elements other than carbon must be in an alkene or an alkyne?

What does valence shell electron pair repulsion theory help determine?

How is the N-Br bond described?

What is the formula for an alkane with ten carbons, decane?

How many hydrogen atoms are directly bonded to the nitrogen atom of a secondary amine?

What is the correct Lewis structure for nitrogen gas?

What does the term "resonance structure" mean?

Which is the best Lewis structure for methane?

What must the minimum electronegativity difference be between two atoms to classify a bond as polar covalent?

What is wrong with burning polymers after their use to make energy?

Understanding Our World With Chemistry

Matter: Properties, Changes and Measurements

Understanding Atoms

Bonding and Reactions

Chemistry of Bonding: Structure and Function of Drug Molecules

Aqueous Solutions: Part I

Aqueous Solutions: Part II

Chemistry of Fire and Heat

Chemistry of Explosions

Applications of Chemical Kinetics

Nuclear Chemistry: Energy, Medicine, Weapons, and Terrorism

Chemical Equilibrium

Introduction to Biochemistry

Filters

Exam 8: Organic Chemistry and Polymers

Phosphine, PH3, is structurally much like ammonia. Which of the following is the best Lewis structure of phosphine?

Any molecule that has a central atom with no lone pairs, and four other, equivalent atoms connected to it, has what shape?

Of the following solvents: ethanol, water, hexane, which is the most polar?

What is an action potential?

The compound H2Se smells absolutely horrible (worse than rotten eggs!). What is the electronegativity difference in one of the H-Se bonds?

How does an immunoassay function?

After drawing the Lewis structure for the molecule ethyne, C2H2, also known by the common name acetylene, answer this: How many double bonds does it contain?

Draw the cyclic, organic molecule benzene, C6H6. How many resonance structures can exist for it?

What do neurotransmitters do?

What is an antibody?

What elements other than carbon must be in an alkene or an alkyne?

What does valence shell electron pair repulsion theory help determine?

How is the N-Br bond described?

What is the formula for an alkane with ten carbons, decane?

How many hydrogen atoms are directly bonded to the nitrogen atom of a secondary amine?

What is the correct Lewis structure for nitrogen gas?

What does the term "resonance structure" mean?

Which is the best Lewis structure for methane?

What must the minimum electronegativity difference be between two atoms to classify a bond as polar covalent?

What is wrong with burning polymers after their use to make energy?

Understanding Our World With Chemistry

Matter: Properties, Changes and Measurements

Understanding Atoms

Bonding and Reactions

Chemistry of Bonding: Structure and Function of Drug Molecules

Aqueous Solutions: Part I

Aqueous Solutions: Part II

Chemistry of Fire and Heat

Chemistry of Explosions

Applications of Chemical Kinetics

Nuclear Chemistry: Energy, Medicine, Weapons, and Terrorism

Chemical Equilibrium

Introduction to Biochemistry

Filters

Phosphine, PH₃, is structurally much like ammonia. Which of the following is the best Lewis structure of phosphine?

The compound H₂Se smells absolutely horrible (worse than rotten eggs!). What is the electronegativity difference in one of the H-Se bonds?

After drawing the Lewis structure for the molecule ethyne, C₂H₂, also known by the common name acetylene, answer this: How many double bonds does it contain?

Draw the cyclic, organic molecule benzene, C₆H₆. How many resonance structures can exist for it?