Question 1

During the carbon cycle plants produce the oxygen that is consumed by animals.

Accepted Answer

A) True 
 B)False

Question 2

Which of the following symbols is used to denote a reversible reaction?

Accepted Answer

A)  → 
B)  ← 
C)    
D)  ↔ 
A)  → 
B)  ← 
C)    
D)  ↔

Question 3

If a reaction occurs very rapidly, even at a relatively low temperature, which of the following is probably true?

Accepted Answer

A)  The reaction is endothermic. 
B)  The reaction is exothermic. 
C)  The reaction has a low activation energy. 
D)  The reaction is at equilibrium. 
A)  The reaction is endothermic. 
B)  The reaction is exothermic. 
C)  The reaction has a low activation energy. 
D)  The reaction is at equilibrium.

Question 4

Decreasing the temperature will decrease the number of collisions that result in product formation.

Accepted Answer

A) True 
 B)False

Question 5

Which of the following is the best definition of a catalyst?

Accepted Answer

A)  A catalyst is a material that speeds up the rate of a chemical reaction. 
B)  A catalyst is a material that speeds up the rate of a chemical reaction without participating in the reaction. 
C)  A catalyst is a material that speeds up the rate of a chemical reaction without being consumed during the reaction. 
D)  All of the above are equally good definitions. 
A)  A catalyst is a material that speeds up the rate of a chemical reaction. 
B)  A catalyst is a material that speeds up the rate of a chemical reaction without participating in the reaction. 
C)  A catalyst is a material that speeds up the rate of a chemical reaction without being consumed during the reaction. 
D)  All of the above are equally good definitions.

Question 6

A block of iron forming a pool of the liquid metal is correctly classified as

Accepted Answer

A)  a chemical change. 
B)  a physical change. 
C)  both a chemical and a physical change. 
D)  neither a chemical nor a physical change. 
A)  a chemical change. 
B)  a physical change. 
C)  both a chemical and a physical change. 
D)  neither a chemical nor a physical change.

Question 7

Which of the following most closely defines the term "reaction rate"?

Accepted Answer

A)  the temperature needed to initiate a reaction 
B)  the position of a reaction at equilibrium 
C)  the speed of a reaction 
D)  the activation energy in the presence of a catalyst 
A)  the temperature needed to initiate a reaction 
B)  the position of a reaction at equilibrium 
C)  the speed of a reaction 
D)  the activation energy in the presence of a catalyst

Question 8

Consider the following image representing an equilibrium mixture. The black spheres represent the reactant and the gray spheres the product.   This reaction was started with only reactants present. If the reaction had been started with only product present, the equilibrium mixture would contain 4 gray spheres and 8 black spheres.

Accepted Answer

A) True 
 B)False

During the carbon cycle plants produce the oxygen that is consumed by animals.

Which of the following symbols is used to denote a reversible reaction?

If a reaction occurs very rapidly, even at a relatively low temperature, which of the following is probably true?

Decreasing the temperature will decrease the number of collisions that result in product formation.

Which of the following is the best definition of a catalyst?

A block of iron forming a pool of the liquid metal is correctly classified as

Which of the following most closely defines the term "reaction rate"?

Measurements in Science and Medicine

Atoms, Elements, and Compounds

Chemical Bonds

Energy and Physical Properties

Solution Concentration

Acids and Bases

Nuclear Chemistry

Hydrocarbons: an Introduction to Organic Molecules

Hydration, Dehydration, and Alcohols

Carbonyl Compounds and Redox Reactions

Organic Acids and Bases

Condensation and Hydrolysis Reactions

Proteins

Carbohydrates

Lipids and Membranes

Nucleic Acids, Protein Synthesis, and Heredity

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Exam 6: Chemical Reactions

During the carbon cycle plants produce the oxygen that is consumed by animals.

Which of the following symbols is used to denote a reversible reaction?

If a reaction occurs very rapidly, even at a relatively low temperature, which of the following is probably true?

Decreasing the temperature will decrease the number of collisions that result in product formation.

Which of the following is the best definition of a catalyst?

A block of iron forming a pool of the liquid metal is correctly classified as

Which of the following most closely defines the term "reaction rate"?

Measurements in Science and Medicine

Atoms, Elements, and Compounds

Chemical Bonds

Energy and Physical Properties

Solution Concentration

Acids and Bases

Nuclear Chemistry

Hydrocarbons: an Introduction to Organic Molecules

Hydration, Dehydration, and Alcohols

Carbonyl Compounds and Redox Reactions

Organic Acids and Bases

Condensation and Hydrolysis Reactions

Proteins

Carbohydrates

Lipids and Membranes

Nucleic Acids, Protein Synthesis, and Heredity

Filters