Question 1

The oxidation number of cesium (Cs)is always +1.

Accepted Answer

A) True 
 B)False  False

Question 2

Which of the following phrases can be used to describe the process of reduction?

Accepted Answer

A) to gain oxygen 
B) to combine with hydrogen 
C) to gain electrons 
D) to decrease in oxidation number 
A) to gain oxygen 
B) to combine with hydrogen 
C) to gain electrons 
D) to decrease in oxidation number A

Question 3

Which of the following is a decomposition reaction?

Accepted Answer

A) SO2 + O2 $\rightarrow$2SO3 
B) 2C2H2 + 5O2 $\rightarrow$ 4CO2 + 2H2O 
C) 2H2O2 $\rightarrow$2H2O + O2 
D) AgNO3 + NaCl $\rightarrow$ AgCl + NaNO3 
A) SO2 + O2 $\rightarrow$2SO3 
B) 2C2H2 + 5O2 $\rightarrow$ 4CO2 + 2H2O 
C) 2H2O2 $\rightarrow$2H2O + O2 
D) AgNO3 + NaCl $\rightarrow$ AgCl + NaNO3 C

Question 4

What is the reducing 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 5

Some redox reactions involve only oxidation without any reduction.

Accepted Answer

A) True 
 B)False

Question 6

Water is a product when any inorganic acid reacts with any inorganic base.

Accepted Answer

A) True 
 B)False

Question 7

In ionic compounds,metals have a positive oxidation number.

Accepted Answer

A) True 
 B)False

Question 8

The net ionic equation for the reaction H2SO4 + NaOH $\rightarrow$Na2SO4 + H2O is
H+ + OH$\rightarrow$H2O.

Accepted Answer

A) True 
 B)False

Question 9

In the reaction Zn + Cu(NO3)2 $\rightarrow$Cu + Zn(NO3),the Zn is reduced.

Accepted Answer

A) True 
 B)False

Question 10

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

Accepted Answer

A) Cl in HCl 
B) Mn in MnO2 
C) H in HCl 
D) O in MnO2 
A) Cl in HCl 
B) Mn in MnO2 
C) H in HCl 
D) O in MnO2

Question 11

Air bags serve an important role in providing driver and front-seat passenger protection in the event of an automobile accident.They rely on several chemical reactions.Which of the following chemicals is responsible for N2 production?

Accepted Answer

A) sodium azide 
B) potassium nitrate 
C) silicon dioxide 
D) more than one answer is correct. 
A) sodium azide 
B) potassium nitrate 
C) silicon dioxide 
D) more than one answer is correct.

Question 12

What is the oxidation number of Br in   ?

Accepted Answer

A) "-1" 
B) "+1" 
C) "+2" 
D) "+3" 
A) "-1" 
B) "+1" 
C) "+2" 
D) "+3"

Question 13

The oxidation number of Cr in K2CrO4 is +6.

Accepted Answer

A) True 
 B)False

Question 14

Lycopene,a phytonutrient,has several potential health benefits,including protection against prostate,cervical and pancreatic cancer.Which of the following is a good source of this substance?

Accepted Answer

A) spinach 
B) broccoli 
C) strawberries 
D) tomatoes 
A) spinach 
B) broccoli 
C) strawberries 
D) tomatoes

Question 15

The reactions NaOH + HCl $\rightarrow$ H2O + NaCl and Ca(OH)2 + 2HBr $\rightarrow$ 2H2O + CaBr2 have the same net ionic equation.

Accepted Answer

A) True 
 B)False

Question 16

Which of the following is a combination reaction?

Accepted Answer

A) SO2 + O2 $\rightarrow$2SO3 
B) 2C2H2 + 5O2 $\rightarrow$4CO2 + 2H2O 
C) 2H2O2 $\rightarrow$2H2O + O2 
D) AgNO3 + NaCl $\rightarrow$ AgCl + NaNO3 
A) SO2 + O2 $\rightarrow$2SO3 
B) 2C2H2 + 5O2 $\rightarrow$4CO2 + 2H2O 
C) 2H2O2 $\rightarrow$2H2O + O2 
D) AgNO3 + NaCl $\rightarrow$ AgCl + NaNO3

Question 17

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

Accepted Answer

A) Cl in HCl 
B) Mn in MnO2 
C) H in HCl 
D) O in MnO2 
A) Cl in HCl 
B) Mn in MnO2 
C) H in HCl 
D) O in MnO2

Question 18

Given the equation 2CO + O2 $\rightarrow$2CO2,how many grams of CO2 form if 34.0 grams of CO are combined with excess oxygen?

Accepted Answer

A) 53.4 
B) 21.6 
C) 145 
D) 107 
A) 53.4 
B) 21.6 
C) 145 
D) 107

Question 19

For the reaction of HCl and NaOH,which of the following type of chemicals will appear in the net equation?

Accepted Answer

A) weak acid 
B) weak base 
C) salt 
D) water 
A) weak acid 
B) weak base 
C) salt 
D) water

Question 20

A net ionic equation may include one or more spectator ions.

Accepted Answer

A) True 
 B)False

Exam 5: Chemical Reactions

The oxidation number of cesium (Cs)is always +1.

Which of the following phrases can be used to describe the process of reduction?

Which of the following is a decomposition reaction?

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

Some redox reactions involve only oxidation without any reduction.

Water is a product when any inorganic acid reacts with any inorganic base.

In ionic compounds,metals have a positive oxidation number.

The net ionic equation for the reaction H2SO4 + NaOH →\rightarrow→ Na2SO4 + H2O is H+ + OH →\rightarrow→ H2O.

In the reaction Zn + Cu(NO3)2 →\rightarrow→ Cu + Zn(NO3),the Zn is reduced.

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

Air bags serve an important role in providing driver and front-seat passenger protection in the event of an automobile accident.They rely on several chemical reactions.Which of the following chemicals is responsible for N2 production?

What is the oxidation number of Br in ?

The oxidation number of Cr in K2CrO4 is +6.

Lycopene,a phytonutrient,has several potential health benefits,including protection against prostate,cervical and pancreatic cancer.Which of the following is a good source of this substance?

The reactions NaOH + HCl →\rightarrow→ H2O + NaCl and Ca(OH)2 + 2HBr →\rightarrow→ 2H2O + CaBr2 have the same net ionic equation.

Which of the following is a combination reaction?

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

Given the equation 2CO + O2 →\rightarrow→ 2CO2,how many grams of CO2 form if 34.0 grams of CO are combined with excess oxygen?

For the reaction of HCl and NaOH,which of the following type of chemicals will appear in the net equation?

A net ionic equation may include one or more spectator ions.

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

The net ionic equation for the reaction H₂SO₄ + NaOH $\rightarrow$ Na₂SO₄ + H₂O is H⁺ + OH $\rightarrow$ H₂O.

In the reaction Zn + Cu(NO₃)₂ $\rightarrow$ Cu + Zn(NO₃),the Zn is reduced.

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

Air bags serve an important role in providing driver and front-seat passenger protection in the event of an automobile accident.They rely on several chemical reactions.Which of the following chemicals is responsible for N₂ production?

The oxidation number of Cr in K₂CrO₄ is +6.

The reactions NaOH + HCl $\rightarrow$ H₂O + NaCl and Ca(OH)₂ + 2HBr $\rightarrow$ 2H₂O + CaBr₂ have the same net ionic equation.

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

Given the equation 2CO + O₂ $\rightarrow$ 2CO₂,how many grams of CO₂ form if 34.0 grams of CO are combined with excess oxygen?