Question 1

What is the oxidation number of Mn in KMnO4?

Accepted Answer

A) +9 
B) +5 
C) +7 
D) +4 
A) +9 
B) +5 
C) +7 
D) +4

Question 2

Which set of coefficients balances the equation? ___CH4$\rightarrow$___C3H8 +___ H2

Accepted Answer

A) 3,1,1 
B) 3,2,1 
C) 3,1,2 
D) 6,2,2 
A) 3,1,1 
B) 3,2,1 
C) 3,1,2 
D) 6,2,2

Question 3

The reaction Ca + Cl2$\rightarrow$CaCl2 is a redox reaction.

Accepted Answer

A) True 
 B)False

Question 4

Which of the following contains the metal with the highest oxidation number?

Accepted Answer

A) CaCl2 
B) NaCl 
C) FeCl3 
D) CuCl2 
A) CaCl2 
B) NaCl 
C) FeCl3 
D) CuCl2

Question 5

A container is filled with 4.0 g H2 and 5.0 g O2.The mixture is ignited to produce water according to the following equation.How much water is produced? 2H2 + O2 $\rightarrow$ 2H2O

Accepted Answer

A) 4.0 g 
B) 5.0 g 
C) 5.6 g 
D) 9.0 g 
A) 4.0 g 
B) 5.0 g 
C) 5.6 g 
D) 9.0 g

Question 6

What is the oxidizing agent in the following reaction? 4HCl + MnO2 $\rightarrow$Cl2 + 2H2O + MnCl2

Accepted Answer

A) HCl 
B) Cl2 
C) MnO2 
D) MnCl2 
A) HCl 
B) Cl2 
C) MnO2 
D) MnCl2

Question 7

Which of the following is an oxidizing agent?

Accepted Answer

A) O2 
B) H2 
C) H2O 
D) HCl 
A) O2 
B) H2 
C) H2O 
D) HCl

Question 8

Which is not a meaning of oxidation?

Accepted Answer

A) to gain electrons 
B) to lose hydrogen 
C) to combine with oxygen 
D) to lose electrons 
A) to gain electrons 
B) to lose hydrogen 
C) to combine with oxygen 
D) to lose electrons

Question 9

Which of the following conversion factors would allow one to calculate the amount of PbI2 produced from a given amount of NaI in the following unbalanced reaction? Pb(NO3)2 + Nal $\rightarrow$ Pbl2 + NaNO3

Accepted Answer

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

Question 10

Which ions in the following reaction would be classified as spectator ions? Zn + 2H+ + 2Cl $\rightarrow$Zn2+ + 2Cl -  + H2

Accepted Answer

A) Zn2+ 
B) H+ 
C) Cl - 
D) More than one response is correct. 
A) Zn2+ 
B) H+ 
C) Cl - 
D) More than one response is correct.

Question 11

How many grams of N2 are required to completely react with 3.03 grams of H2 for the following balanced chemical equation? N2 + 3H2$\rightarrow$2NH3

Accepted Answer

A) 1.00 
B) 6.00 
C) 14.0 
D) 28.0 
A) 1.00 
B) 6.00 
C) 14.0 
D) 28.0

Question 12

When the following equation is balanced,how many oxygen atoms are present on the reactant side of the equation? C2H6 + O2 $\rightarrow$ CO2 + H2O

Accepted Answer

A) 14 
B) 7 
C) 3 
D) 20 
A) 14 
B) 7 
C) 3 
D) 20

Question 13

While antiseptics and disinfectants are both antibacterials,only an antiseptic should be used on living tissue.

Accepted Answer

A) True 
 B)False

Question 14

When the equation below is properly balanced,what coefficient is in front of KCl? KClO3 $\rightarrow$ KCl + O2

Accepted Answer

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

Question 15

A REDOX reaction can also be a(n)

Accepted Answer

A) combination reaction. 
B) single replacement reaction. 
C) decomposition reaction. 
D) More than one response is correct. 
A) combination reaction. 
B) single replacement reaction. 
C) decomposition reaction. 
D) More than one response is correct.

Question 16

The ultimate source of all energy used by animals is the carbohydrates found in plants.

Accepted Answer

A) True 
 B)False

Question 17

Which of the following types of chemical reaction classes always involve oxidation?

Accepted Answer

A) single replacement 
B) double replacement 
C) combination 
D) decomposition 
A) single replacement 
B) double replacement 
C) combination 
D) decomposition

Question 18

Single replacement reactions are always

Accepted Answer

A) redox reactions. 
B) nonredox reactions. 
C) combination reactions. 
D) decomposition reactions. 
A) redox reactions. 
B) nonredox reactions. 
C) combination reactions. 
D) decomposition reactions.

Question 19

A percentage yield greater than 100% has been reported in a scientific paper you are assigned to read.What would be a reasonable explanation for this?

Accepted Answer

A) A lack of training of the professor who published the study. 
B) The product was measured more than once. 
C) Small measurement errors could have caused this to occur. 
D) It must be a typographical error since yields can't exceed 100%. 
A) A lack of training of the professor who published the study. 
B) The product was measured more than once. 
C) Small measurement errors could have caused this to occur. 
D) It must be a typographical error since yields can't exceed 100%.

Question 20

The energy involved in chemical reactions

Accepted Answer

A) always appears as heat. 
B) always appears as light. 
C) always appears as electricity. 
D) can take many forms. 
A) always appears as heat. 
B) always appears as light. 
C) always appears as electricity. 
D) can take many forms.

Exam 5: Chemical Reactions

What is the oxidation number of Mn in KMnO4?

Which set of coefficients balances the equation? ___CH4 →\rightarrow→ ___C3H8 +___ H2

The reaction Ca + Cl2 →\rightarrow→ CaCl2 is a redox reaction.

Which of the following contains the metal with the highest oxidation number?

A container is filled with 4.0 g H2 and 5.0 g O2.The mixture is ignited to produce water according to the following equation.How much water is produced? 2H2 + O2 →\rightarrow→ 2H2O

What is the oxidizing agent in the following reaction? 4HCl + MnO2 →\rightarrow→ Cl2 + 2H2O + MnCl2

Which of the following is an oxidizing agent?

Which is not a meaning of oxidation?

Which of the following conversion factors would allow one to calculate the amount of PbI2 produced from a given amount of NaI in the following unbalanced reaction? Pb(NO3)2 + Nal →\rightarrow→ Pbl2 + NaNO3

Which ions in the following reaction would be classified as spectator ions? Zn + 2H+ + 2Cl →\rightarrow→ Zn2+ + 2Cl - + H2

How many grams of N2 are required to completely react with 3.03 grams of H2 for the following balanced chemical equation? N2 + 3H2 →\rightarrow→ 2NH3

When the following equation is balanced,how many oxygen atoms are present on the reactant side of the equation? C2H6 + O2 →\rightarrow→ CO2 + H2O

While antiseptics and disinfectants are both antibacterials,only an antiseptic should be used on living tissue.

When the equation below is properly balanced,what coefficient is in front of KCl? KClO3 →\rightarrow→ KCl + O2

A REDOX reaction can also be a(n)

The ultimate source of all energy used by animals is the carbohydrates found in plants.

Which of the following types of chemical reaction classes always involve oxidation?

Single replacement reactions are always

A percentage yield greater than 100% has been reported in a scientific paper you are assigned to read.What would be a reasonable explanation for this?

The energy involved in chemical reactions

Matter, measurements, and Calculations

Atoms and Molecules

Electronic Structure and the Periodic Law

Forces Between Particles

The States of Matter

Solutions and Colloids

Reaction Rates and Equilibrium

Acids, bases, and Salts

Radioactivity and Nuclear Processes

Organic Compounds: Alkanes

Unsaturated Hydrocarbons

Alcohols, phenols, and Ethers

Aldehydes and Ketones

Carboxylic Acids and Esters

Amines and Amides

Carbohydrates

Lipids

Proteins

Enzymes

Nucleic Acids and Protein Synthesis

Nutrition and Energy for Life

Carbohydrate Metabolism

Lipid and Amino Acid Metabolism

Body Fluids

Filters

What is the oxidation number of Mn in KMnO₄?

Which set of coefficients balances the equation? _CH₄ $\rightarrow$ _C₃H₈ +___ H₂

The reaction Ca + Cl₂ $\rightarrow$ CaCl₂ is a redox reaction.

A container is filled with 4.0 g H₂ and 5.0 g O₂.The mixture is ignited to produce water according to the following equation.How much water is produced? 2H₂ + O₂ $\rightarrow$ 2H₂O

What is the oxidizing agent in the following reaction? 4HCl + MnO₂ $\rightarrow$ Cl₂ + 2H₂O + MnCl₂

Which of the following conversion factors would allow one to calculate the amount of PbI₂ produced from a given amount of NaI in the following unbalanced reaction? Pb(NO₃)₂ + Nal $\rightarrow$ Pbl₂ + NaNO₃

Which ions in the following reaction would be classified as spectator ions? Zn + 2H⁺ + 2Cl $\rightarrow$ Zn²⁺ + 2Cl ^- + H₂

How many grams of N₂ are required to completely react with 3.03 grams of H₂ for the following balanced chemical equation? N₂ + 3H₂ $\rightarrow$ 2NH₃

When the following equation is balanced,how many oxygen atoms are present on the reactant side of the equation? C₂H₆ + O₂ $\rightarrow$ CO₂ + H₂O

When the equation below is properly balanced,what coefficient is in front of KCl? KClO₃ $\rightarrow$ KCl + O₂