Question 1

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

Question 2

​ 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 
A) 0 
B) −2 
C) −1 
D) +1

Question 3

All redox reactions are exothermic reactions.

Accepted Answer

A) True 
 B)False

Question 4

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

Accepted Answer

A) True 
 B)False

Question 5

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 6

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

Question 7

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

Accepted Answer

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

Question 8

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

Question 9

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. 
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 10

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

Accepted Answer

A) True 
 B)False

Question 11

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

Question 12

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

Question 13

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 14

​ 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. 
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 15

Most reactions give a percent yield of almost 100%.

Accepted Answer

A) True 
 B)False

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

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

All redox reactions are exothermic reactions.

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

Which of the following is an oxidizing agent?

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?

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

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

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

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

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

The modern definition of oxidation is a process

What is the oxidation number of Mn in KMnO₄?

Identify a true statement of double-replacement reaction.

Most reactions give a percent yield of almost 100%.

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

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Exam 5: Chemical Reactions

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

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

All redox reactions are exothermic reactions.

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

Which of the following is an oxidizing agent?

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?

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

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

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

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

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

The modern definition of oxidation is a process

What is the oxidation number of Mn in KMnO4?

​ Identify a true statement of double-replacement reaction.

Most reactions give a percent yield of almost 100%.

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

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

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

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?

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

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

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

What is the oxidation number of Mn in KMnO₄?

Identify a true statement of double-replacement reaction.