Question 1

Which ions in the following reaction would be classified as spectator ions? Zn + 2H+ + 2Cl → 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. C

Question 2

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

Accepted Answer

A) True 
 B)False  True

Question 3

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

Accepted Answer

A) True 
 B)False  False

Question 4

Consider the reactants and propose the right side of the equation. Mg + H2SO4 → _______

Accepted Answer

A) no reaction 
B) MgHSO4 
C) MgSO4 + H2 
D) MgH2 + SO4 
A) no reaction 
B) MgHSO4 
C) MgSO4 + H2 
D) MgH2 + SO4

Question 5

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

Accepted Answer

A) True 
 B)False

Question 6

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 7

The batteries in an automobile contain lead plates, water, PbSO4 and H2SO4. The instructions with a battery charger state that when a car battery is being charged, there must be no flames or sparks. Hydrogen is liberated during the process and might explode on ignition. Therefore, the hydrogen released is an indication that a redox reaction occurs during the charging process.

Accepted Answer

A) True 
 B)False

Question 8

The reaction AgNO3 + HCl → AgCl + HNO3 is a redox reaction.

Accepted Answer

A) True 
 B)False

Question 9

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

Accepted Answer

A) True 
 B)False

Question 10

Integers are used in properly balanced chemical equations because whole moles of substances are needed for a reaction.

Accepted Answer

A) True 
 B)False

Question 11

The Haber Process is a method for the production of ammonia, an important chemical intermediate. The reaction for this process is: N2 + 3H2 → 2NH3. When the equation is correctly interpreted in terms of moles, how many moles of H2 will react with one mole of N2?

Accepted Answer

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

Question 12

The reducing agent is the substance that is reduced in the reaction.

Accepted Answer

A) True 
 B)False

Question 13

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 14

The oxidation number of iodine in HIO4 is +6.

Accepted Answer

A) True 
 B)False

Question 15

Some redox reactions involve only oxidation without any reduction.

Accepted Answer

A) True 
 B)False

Question 16

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 17

The oxidation number of Cr in K2CrO4 is +6.

Accepted Answer

A) True 
 B)False

Question 18

2CO + O2 → 2CO2

Accepted Answer

A) True 
 B)False

Question 19

What is the assigned oxidation number for molybdenum in aluminum molybdate, Al2(MoO4)3?

Accepted Answer

A) +2 
B) +3 
C) +6 
D) +7 
A) +2 
B) +3 
C) +6 
D) +7

Question 20

Which of the following is a decomposition reaction?

Accepted Answer

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

Exam 5: Chemical Reactions

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

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

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

Consider the reactants and propose the right side of the equation. Mg + H2SO4 → _______

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

Single replacement reactions are always

The reaction AgNO3 + HCl → AgCl + HNO3 is a redox reaction.

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

Integers are used in properly balanced chemical equations because whole moles of substances are needed for a reaction.

The Haber Process is a method for the production of ammonia, an important chemical intermediate. The reaction for this process is: N2 + 3H2 → 2NH3. When the equation is correctly interpreted in terms of moles, how many moles of H2 will react with one mole of N2?

The reducing agent is the substance that is reduced in the reaction.

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

The oxidation number of iodine in HIO4 is +6.

Some redox reactions involve only oxidation without any reduction.

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.

2CO + O2 → 2CO2

What is the assigned oxidation number for molybdenum in aluminum molybdate, Al2(MoO4)3?

Which of the following is a decomposition reaction?

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

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

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

Consider the reactants and propose the right side of the equation. Mg + H₂SO₄ → _______

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

The reaction AgNO₃ + HCl → AgCl + HNO₃ is a redox reaction.

The Haber Process is a method for the production of ammonia, an important chemical intermediate. The reaction for this process is: N₂ + 3H₂ → 2NH₃. When the equation is correctly interpreted in terms of moles, how many moles of H₂ will react with one mole of N₂?

The oxidation number of iodine in HIO₄ is +6.

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.

2CO + O₂ → 2CO₂

What is the assigned oxidation number for molybdenum in aluminum molybdate, Al₂(MoO₄)₃?