Question 1

Which of the following molecules is(are) polar?

Accepted Answer

A)  CCl4 
B)  CH2Cl2 
C)  both of them 
D)  neither of them 
A)  CCl4 
B)  CH2Cl2 
C)  both of them 
D)  neither of them B

Question 2

Formaldehyde has the chemical formula CH2O. How many electrons must be shown in the Lewis structure of formaldehyde?

Accepted Answer

A)  4 
B)  8 
C)  12 
D)  16 
A)  4 
B)  8 
C)  12 
D)  16 C

Question 3

What is the correct name for XeF4?

Accepted Answer

A)  xenon fluoride 
B)  xenon difluoride 
C)  xenon tetrafluoride 
D)  xenon hexafluoride 
A)  xenon fluoride 
B)  xenon difluoride 
C)  xenon tetrafluoride 
D)  xenon hexafluoride C

Question 4

Consider the following Lewis structure.  
-Which of the following correctly characterizes this compound?

Accepted Answer

A)  All atoms obey the octet rule. 
B)  40 valence electrons are represented. 
C)  The central atom is from period 4. 
D)  Contains a metalloid and a nonmetal. 
E)  None of these are true of this compound. 
A)  All atoms obey the octet rule. 
B)  40 valence electrons are represented. 
C)  The central atom is from period 4. 
D)  Contains a metalloid and a nonmetal. 
E)  None of these are true of this compound.

Question 5

Consider the following Lewis structure.  
-What is the correct name for this compound?

Accepted Answer

A)  monphosphorus pentachloride 
B)  phosphorus chloride 
C)  phosphorus pentachloride 
D)  pentaphosphorus chloride 
E)  phophorus pentachlorine 
A)  monphosphorus pentachloride 
B)  phosphorus chloride 
C)  phosphorus pentachloride 
D)  pentaphosphorus chloride 
E)  phophorus pentachlorine

Question 6

What is the name of the species formed when a bromine atom gains an electron?

Accepted Answer

A)  bromate 
B)  bromide 
C)  bromine 
D)  bromine ion 
A)  bromate 
B)  bromide 
C)  bromine 
D)  bromine ion

Question 7

Which of the following is generally true of all anions?

Accepted Answer

A)  An anion has equal numbers of protons and electrons. 
B)  An anion has fewer protons than electrons. 
C)  An anion has more protons than electrons. 
D)  An anion has more electrons than neutrons. 
A)  An anion has equal numbers of protons and electrons. 
B)  An anion has fewer protons than electrons. 
C)  An anion has more protons than electrons. 
D)  An anion has more electrons than neutrons.

Question 8

What is the correct formula for aluminum oxide?

Accepted Answer

A)  AlO 
B)  AlO2 
C)  Al2O 
D)  Al2O3 
A)  AlO 
B)  AlO2 
C)  Al2O 
D)  Al2O3

Question 9

Which of the following endings is generally associated with a monatomic anion?

Accepted Answer

A)  -ade 
B)  -ate 
C)  -ic 
D)  -ide 
A)  -ade 
B)  -ate 
C)  -ic 
D)  -ide

Question 10

Low electronegativities are associated with which type of elements?

Accepted Answer

A)  metals 
B)  metalloids 
C)  noble gases 
D)  nonmetals 
A)  metals 
B)  metalloids 
C)  noble gases 
D)  nonmetals

Question 11

Under which of the following conditions is the A-B bond considered to be ionic?

Accepted Answer

A)  when A and B have the same electronegativity 
B)  when the difference between the electronegativities of the atoms is 1.0 
C)  when the difference between the electronegativities of the atoms is 1.5 
D)  when the difference between the electronegativities of the atoms is 2.0 
A)  when A and B have the same electronegativity 
B)  when the difference between the electronegativities of the atoms is 1.0 
C)  when the difference between the electronegativities of the atoms is 1.5 
D)  when the difference between the electronegativities of the atoms is 2.0

Question 12

Which of the following is the correct way to write the formula of the compound formed between the calcium ion and the sulfate ion?

Accepted Answer

A)  Ca2(SO4)2 
B)  Ca2SO4 
C)  Ca(SO4)2 
D)  CaSO4 
A)  Ca2(SO4)2 
B)  Ca2SO4 
C)  Ca(SO4)2 
D)  CaSO4

Question 13

Which of the following molecules is(are) polar?

Accepted Answer

A)  H2O 
B)  CO2 
C)  both of them 
D)  neither of them 
A)  H2O 
B)  CO2 
C)  both of them 
D)  neither of them

Question 14

How many electrons are associated with a single bond?

Accepted Answer

A)  1 
B)  2 
C)  4 
D)  6 
A)  1 
B)  2 
C)  4 
D)  6

Question 15

Which of the following occurs when a magnesium atom is converted to Mg2+?

Accepted Answer

A)  The magnesium atom gains two electrons and loses two protons. 
B)  The magnesium atom gains two electrons. 
C)  The magnesium atom loses two electrons and two protons. 
D)  The magnesium atom loses two electrons. 
A)  The magnesium atom gains two electrons and loses two protons. 
B)  The magnesium atom gains two electrons. 
C)  The magnesium atom loses two electrons and two protons. 
D)  The magnesium atom loses two electrons.

Question 16

AgCl is a chemical commonly used in photography. What is the correct name for AgCl?

Accepted Answer

A)  monosilver monochloride 
B)  silver chloride 
C)  silver chlorine 
D)  silver monochlorine 
A)  monosilver monochloride 
B)  silver chloride 
C)  silver chlorine 
D)  silver monochlorine

Question 17

What is the correct chemical name for a compound with the formula N2O3?

Accepted Answer

A)  nitrogen oxide 
B)  nitrogen trioxide 
C)  nitrogen ozide 
D)  dinitrogen trioxide 
A)  nitrogen oxide 
B)  nitrogen trioxide 
C)  nitrogen ozide 
D)  dinitrogen trioxide

Question 18

Which of the following is the correct way to write the formula of the compound formed between the barium ion and the sulfate ion?

Accepted Answer

A)  Ba2(SO4)2 
B)  Ba2SO4 
C)  Ba(SO4)2 
D)  BaSO4 
A)  Ba2(SO4)2 
B)  Ba2SO4 
C)  Ba(SO4)2 
D)  BaSO4

Question 19

What is the formula of the compound formed between barium and oxygen?

Accepted Answer

A)  Ba2O2 
B)  Ba2O 
C)  BaO2 
D)  BaO 
A)  Ba2O2 
B)  Ba2O 
C)  BaO2 
D)  BaO

Question 20

What is the relationship between the nitrate ion and the nitrite ion?

Accepted Answer

A)  The nitrate ion has one less oxygen atom than does the nitrite ion and both have the same charge. 
B)  The nitrate ion has one more oxygen atom than does the nitrite ion and both have the same charge. 
C)  In addition to having one less oxygen atom than nitrite, nitrate also has a larger negative charge. 
D)  In addition to having one more oxygen atom than nitrite, nitrate also has a larger negative charge. 
A)  The nitrate ion has one less oxygen atom than does the nitrite ion and both have the same charge. 
B)  The nitrate ion has one more oxygen atom than does the nitrite ion and both have the same charge. 
C)  In addition to having one less oxygen atom than nitrite, nitrate also has a larger negative charge. 
D)  In addition to having one more oxygen atom than nitrite, nitrate also has a larger negative charge.

Exam 3: Chemical Bonds

Which of the following molecules is(are) polar?

Formaldehyde has the chemical formula CH2O. How many electrons must be shown in the Lewis structure of formaldehyde?

What is the correct name for XeF4?

Consider the following Lewis structure. -Which of the following correctly characterizes this compound?

Consider the following Lewis structure. -What is the correct name for this compound?

What is the name of the species formed when a bromine atom gains an electron?

Which of the following is generally true of all anions?

What is the correct formula for aluminum oxide?

Which of the following endings is generally associated with a monatomic anion?

Low electronegativities are associated with which type of elements?

Under which of the following conditions is the A-B bond considered to be ionic?

Which of the following is the correct way to write the formula of the compound formed between the calcium ion and the sulfate ion?

Which of the following molecules is(are) polar?

How many electrons are associated with a single bond?

Which of the following occurs when a magnesium atom is converted to Mg2+?

AgCl is a chemical commonly used in photography. What is the correct name for AgCl?

What is the correct chemical name for a compound with the formula N2O3?

Which of the following is the correct way to write the formula of the compound formed between the barium ion and the sulfate ion?

What is the formula of the compound formed between barium and oxygen?

What is the relationship between the nitrate ion and the nitrite ion?

Matter, Energy, and Measurement

Atoms

Chemical Reactions

Gases, Liquids, and Solids

Solutions and Colloids

Reaction Rates and Chemical Equilibrium

Acids and Bases

Nuclear Chemistry

Organic Chemistry

Alkanes

Alkenes and Alkynes

Benzene and Its Derivatives

Alcohols, Ethers, and Thiols

Chirality: the Handedness of Molecules

Amines

Aldehydes and Ketones

Carboxylic Acids

Carboxylic Anhydrides, Esters, and Amides

Carbohydrates

Lipids

Proteins

Enzymes

Chemical Communications: Neurotransmitters and Hormones

Nucleotides, Nucleic Acids, and Heredity

Gene Expression and Protein Synthesis

Bioenergetics: How the Body Converts Food to Energy

Specific Catabolic Pathways: Carbohydrate, Lipid, and Protein Metabolism

Biosynthetic Pathways

Nutrition

Immunochemistry

Body Fluids

Filters

Formaldehyde has the chemical formula CH₂O. How many electrons must be shown in the Lewis structure of formaldehyde?

What is the correct name for XeF₄?

Which of the following occurs when a magnesium atom is converted to Mg²⁺?

What is the correct chemical name for a compound with the formula N₂O₃?