Question 1

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 A

Question 2

Consider the reactants in the partial equation given.Which choice is a product?
H3PO4 + Sr(OH)2 $\rarr$ _______

Accepted Answer

A)  no reaction 
B)  SrH3PO5 
C)  SrH5PO6 
D)  Sr3(PO4)2 
A)  no reaction 
B)  SrH3PO5 
C)  SrH5PO6 
D)  Sr3(PO4)2 D

Question 3

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 A

Question 4

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 5

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 6

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 7

Tests are to be conducted on new anti-cancer drug and you are to prepare a fresh supply for the human subject studies.You discover that you were able to produce 1.345 g of this substance although it was theoretically possible to make 1.433 g.What was the percent yield for this synthesis?

Accepted Answer

A)  93.859 % 
B)  93.86 % 
C)  94 % 
D)  0.9386 % 
A)  93.859 % 
B)  93.86 % 
C)  94 % 
D)  0.9386 %

Question 8

Automotive car batteries rely on the reaction shown below.Identify the spectator ion(s).
PbO2(s)+ 4 H+(aq)+ 2 SO42-(aq)+ Pb(s)$\rarr$ 2 PbSO4(s)+ 2 H2O(l)

Accepted Answer

A)  SO42- 
B)  H+ 
C)  H+ and SO42- 
D)  There are no spectator ions. 
A)  SO42- 
B)  H+ 
C)  H+ and SO42- 
D)  There are no spectator ions.

Question 9

Tincture of iodine is an antiseptic.Which of the following is another antiseptic?

Accepted Answer

A)  5% sodium hypochlorite 
B)  3% hydrogen peroxide 
C)  ozone 
D)  All are antiseptics 
A)  5% sodium hypochlorite 
B)  3% hydrogen peroxide 
C)  ozone 
D)  All are antiseptics

Question 10

If 5 grams of CO and 5 grams of O2 are combined according to the reaction,which is the limiting reagent? 2CO + O2 $\rarr$  2CO2

Accepted Answer

A)  CO2 
B)  O2 
C)  CO 
D)  CO and O2 
A)  CO2 
B)  O2 
C)  CO 
D)  CO and O2

Question 11

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

Accepted Answer

A) True 
 B)False

Question 12

The reaction AgNO3 + HCl $\rarr$  AgCl + HNO3 is a redox reaction.

Accepted Answer

A) True 
 B)False

Question 13

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

Accepted Answer

A) True 
 B)False

Question 14

The following would represent what type of chemical reaction?

Accepted Answer

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

Question 15

The oxidation number of Cr in K2CrO4 is +6.

Accepted Answer

A) True 
 B)False

Question 16

Consider the following chemical equation.Which substance is oxidized?
BaCl2 (aq)+ H2SO4 (aq)$\rarr$ BaSO4 (s)+ 2HCl (aq)

Accepted Answer

A)  Ba2+ 
B)  Cl- and H+ 
C)  SO42- 
D)  none of them 
A)  Ba2+ 
B)  Cl- and H+ 
C)  SO42- 
D)  none of them

Question 17

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

Accepted Answer

A) True 
 B)False

Question 18

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 19

What is the oxidation number of Cl in HClO3?

Accepted Answer

A)  +2 
B)  +3 
C)  +4 
D)  +5 
A)  +2 
B)  +3 
C)  +4 
D)  +5

Question 20

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

Accepted Answer

A) True 
 B)False

Exam 5: Chemical Reactions

Which of the following is an oxidizing agent?

Consider the reactants in the partial equation given.Which choice is a product? H3PO4 + Sr(OH)2 →\rarr→ _______

Which is not a meaning of oxidation?

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

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

Tests are to be conducted on new anti-cancer drug and you are to prepare a fresh supply for the human subject studies.You discover that you were able to produce 1.345 g of this substance although it was theoretically possible to make 1.433 g.What was the percent yield for this synthesis?

Automotive car batteries rely on the reaction shown below.Identify the spectator ion(s). PbO2(s)+ 4 H+(aq)+ 2 SO42-(aq)+ Pb(s) →\rarr→ 2 PbSO4(s)+ 2 H2O(l)

Tincture of iodine is an antiseptic.Which of the following is another antiseptic?

If 5 grams of CO and 5 grams of O2 are combined according to the reaction,which is the limiting reagent? 2CO + O2 →\rarr→ 2CO2

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

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

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

The following would represent what type of chemical reaction?

The oxidation number of Cr in K2CrO4 is +6.

Consider the following chemical equation.Which substance is oxidized? BaCl2 (aq)+ H2SO4 (aq) →\rarr→ BaSO4 (s)+ 2HCl (aq)

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

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

What is the oxidation number of Cl in HClO3?

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

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

Consider the reactants in the partial equation given.Which choice is a product? H₃PO₄ + Sr(OH)₂ $\rarr$ _______

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

Automotive car batteries rely on the reaction shown below.Identify the spectator ion(s). PbO₂(s)+ 4 H⁺(aq)+ 2 SO₄^2-(aq)+ Pb(s) $\rarr$ 2 PbSO₄(s)+ 2 H₂O(l)

If 5 grams of CO and 5 grams of O₂ are combined according to the reaction,which is the limiting reagent? 2CO + O₂ $\rarr$ 2CO₂

The reaction AgNO₃ + HCl $\rarr$ AgCl + HNO₃ is a redox reaction.

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

The oxidation number of Cr in K₂CrO₄ is +6.

Consider the following chemical equation.Which substance is oxidized? BaCl₂ (aq)+ H₂SO₄ (aq) $\rarr$ BaSO₄(s)+ 2HCl (aq)

What is the oxidation number of Cl in HClO₃?