Question 1

Products are always on the right side of a chemical equation.

Accepted Answer

A) True 
 B)False

Question 2

All redox reactions are exothermic reactions.

Accepted Answer

A) True 
 B)False

Question 3

​ What will be the sum of the oxidation numbers of all the atoms in the polyatomic ion HPO42−?

Accepted Answer

A)  0
B)  −2
C)  −1
D)  +1

Question 4

Which of the following is an oxidizing agent?

Accepted Answer

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

Question 5

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

Accepted Answer

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

Question 6

The modern definition of oxidation is a process

Accepted Answer

A)  involving a reaction with oxygen.
B)  in which hydrogen is gained.
C)  in which electrons are gained.
D)  none of the choices.

Question 7

​ Identify a true statement of double-replacement reaction.

Accepted Answer

A)  It is a chemical reaction in which two compounds react and exchange partners to form two new compounds.
B)  It is a chemical reaction in which two compounds react and exchange partners to form signel compounds.
C)  It is a chemical reaction in which a single substance reacts to form two or more simpler substances.
D)  It is a chemical reaction in which two or more substances react to form a single substance.

Question 8

Which of the following statements is not true about the reaction? 2 CH4 + 3 O2 → 2 CO2 + 4 H2O

Accepted Answer

A)  Water is a reactant.
B)  Methane and carbon dioxide are products.
C)  Methane is a product.
D)  Water and carbon dioxide are products.

Question 9

Most reactions give a percent yield of almost 100%.

Accepted Answer

A) True 
 B)False

Question 10

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

Accepted Answer

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

Question 11

What is the oxidation number of Mn in KMnO4?

Accepted Answer

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

Question 12

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

Question 13

In the reaction 2CH4 + O2 → 2CO + 4H2, how many molecules of CO will be produced by the complete reaction of 1.60 grams of CH4?

Accepted Answer

A)  12.0 × 1023
B)  3.01 × 1022
C)  6.02 × 1022
D)  2.00

Question 14

The reaction Mg + 3N2 → Mg3N2 is correctly balanced as written.

Accepted Answer

A) True 
 B)False

Question 15

The reaction 2KBr + F2 → 2KF + Br2 is an example of a _____  reaction.

Accepted Answer

A)  spectator
B)  metaphysical
C)  single replacement
D)  double replacement

Exam 5: Chemical Reactions

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

Correct Answer
verified

Which of the following statements is not true about the reaction? 2 CH₄ + 3 O₂ → 2 CO₂ + 4 H₂O

Correct Answer
verified

The reaction 2KBr + F₂ → 2KF + Br₂ is an example of a _____ reaction.

Correct Answer
verified

What will be the sum of the oxidation numbers of all the atoms in the polyatomic ion HPO₄²⁻?

Correct Answer
verified

All redox reactions are exothermic reactions.

Correct Answer
verified

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

Correct Answer
verified

Identify a true statement of double-replacement reaction.

Correct Answer
verified

The reaction Mg + 3N₂ → Mg₃N₂ is correctly balanced as written.

Correct Answer
verified

The modern definition of oxidation is a process

Correct Answer
verified

Products are always on the right side of a chemical equation.

Correct Answer
verified

Which of the following is an oxidizing agent?

Correct Answer
verified

What is the oxidation number of Mn in KMnO₄?

Correct Answer
verified

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

Correct Answer
verified

In the reaction 2CH₄ + O₂ → 2CO + 4H₂, how many molecules of CO will be produced by the complete reaction of 1.60 grams of CH₄?

Correct Answer
verified

Most reactions give a percent yield of almost 100%.

Correct Answer
verified

Exam 5: Chemical Reactions

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

Correct AnswerverifiedShow Answer

Which of the following statements is not true about the reaction? 2 CH4 + 3 O2 → 2 CO2 + 4 H2O

Correct AnswerverifiedShow Answer

The reaction 2KBr + F2 → 2KF + Br2 is an example of a _____ reaction.

Correct AnswerverifiedShow Answer

​ What will be the sum of the oxidation numbers of all the atoms in the polyatomic ion HPO42−?

Correct AnswerverifiedShow Answer

All redox reactions are exothermic reactions.

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

​ Identify a true statement of double-replacement reaction.

Correct AnswerverifiedShow Answer

The reaction Mg + 3N2 → Mg3N2 is correctly balanced as written.

Correct AnswerverifiedShow Answer

The modern definition of oxidation is a process

Correct AnswerverifiedShow Answer

Products are always on the right side of a chemical equation.

Correct AnswerverifiedShow Answer

Which of the following is an oxidizing agent?

Correct AnswerverifiedShow Answer

What is the oxidation number of Mn in KMnO4?

Correct AnswerverifiedShow Answer

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

Correct AnswerverifiedShow Answer

In the reaction 2CH4 + O2 → 2CO + 4H2, how many molecules of CO will be produced by the complete reaction of 1.60 grams of CH4?

Correct AnswerverifiedShow Answer

Most reactions give a percent yield of almost 100%.

Correct AnswerverifiedShow Answer

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

Correct Answer
verified

Which of the following statements is not true about the reaction? 2 CH₄ + 3 O₂ → 2 CO₂ + 4 H₂O

Correct Answer
verified

The reaction 2KBr + F₂ → 2KF + Br₂ is an example of a _____ reaction.

Correct Answer
verified

What will be the sum of the oxidation numbers of all the atoms in the polyatomic ion HPO₄²⁻?

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Identify a true statement of double-replacement reaction.

Correct Answer
verified

The reaction Mg + 3N₂ → Mg₃N₂ is correctly balanced as written.

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

Correct Answer
verified

What is the oxidation number of Mn in KMnO₄?

Correct Answer
verified

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

Correct Answer
verified

In the reaction 2CH₄ + O₂ → 2CO + 4H₂, how many molecules of CO will be produced by the complete reaction of 1.60 grams of CH₄?

Correct Answer
verified

Correct Answer
verified