Question 1

Which of the following is an element?

Accepted Answer

A)  brass 
B)  salt 
C)  water 
D)  earth 
E)  oxygen 
A)  brass 
B)  salt 
C)  water 
D)  earth 
E)  oxygen E

Question 2

Which of the following is only a physical change?

Accepted Answer

A)  Sugar dissolves in coffee. 
B)  Cookies burn in the oven. 
C)  A banana ripens. 
D)  Leaves turn colors in the fall. 
E)  At least two of the above (a-d) exhibit only a physical change. 
A)  Sugar dissolves in coffee. 
B)  Cookies burn in the oven. 
C)  A banana ripens. 
D)  Leaves turn colors in the fall. 
E)  At least two of the above (a-d) exhibit only a physical change. A

Question 3

Which of the following is a physical change?

Accepted Answer

A)  burning gasoline 
B)  cooking an egg 
C)  decomposing meat 
D)  evaporating water 
E)  rusting iron 
A)  burning gasoline 
B)  cooking an egg 
C)  decomposing meat 
D)  evaporating water 
E)  rusting iron D

Question 4

The process of filtering a sand-saltwater mixture is a ______________ process.

Accepted Answer

The answer of The process of filtering a sand-saltwater mixture...

Question 5

An example of a pure substance is

Accepted Answer

A)  elements 
B)  compounds 
C)  pure water 
D)  carbon dioxide 
E)  all of these 
A)  elements 
B)  compounds 
C)  pure water 
D)  carbon dioxide 
E)  all of these

Question 6

Diamond is a __________ state of matter.

Accepted Answer

A)  solid 
B)  liquid 
C)  gaseous 
D)  unknown 
A)  solid 
B)  liquid 
C)  gaseous 
D)  unknown

Question 7

A compound can consist of one kind of element.

Accepted Answer

A) True 
 B)False

Question 8

The normal boiling point of water is 100oC, which is a physical property of the substance water.

Accepted Answer

A) True 
 B)False

Question 9

Which is an example of a homogeneous mixture?

Accepted Answer

A)  vodka 
B)  oily water 
C)  soil (dust) 
D)  sodium chloride 
E)  aluminum 
A)  vodka 
B)  oily water 
C)  soil (dust) 
D)  sodium chloride 
E)  aluminum

Question 10

Which of these is a chemical property?

Accepted Answer

A)  Helium is very nonreactive. 
B)  Sodium is a soft shiny metal. 
C)  Water has a high specific heat. 
D)  Glycerol is a viscous liquid. 
E)  Ice melts at 0ºC. 
A)  Helium is very nonreactive. 
B)  Sodium is a soft shiny metal. 
C)  Water has a high specific heat. 
D)  Glycerol is a viscous liquid. 
E)  Ice melts at 0ºC.

Question 11

An element consists of only single atoms of that element.

Accepted Answer

A) True 
 B)False

Question 12

An example of a mixture is

Accepted Answer

A)  hydrogen fluoride 
B)  purified water 
C)  gold 
D)  the air in this room 
E)  all of these 
A)  hydrogen fluoride 
B)  purified water 
C)  gold 
D)  the air in this room 
E)  all of these

Question 13

Which of the following processes is a chemical change?

Accepted Answer

A)  Dry ice sublimes when left on the demo table in lecture. 
B)  The light on a candle burns until a bell jar is placed over it for a period of time. 
C)  When a few drops of red food coloring are added to a beaker of hot water, the water immediately turns red. 
D)  Liquid nitrogen dumped onto the floor vaporizes at room temperature. 
E)  None of the above processes are chemical changes. 
A)  Dry ice sublimes when left on the demo table in lecture. 
B)  The light on a candle burns until a bell jar is placed over it for a period of time. 
C)  When a few drops of red food coloring are added to a beaker of hot water, the water immediately turns red. 
D)  Liquid nitrogen dumped onto the floor vaporizes at room temperature. 
E)  None of the above processes are chemical changes.

Question 14

Water is an example of

Accepted Answer

A)  a homogeneous mixture 
B)  a heterogeneous mixture 
C)  a compound 
D)  an element 
A)  a homogeneous mixture 
B)  a heterogeneous mixture 
C)  a compound 
D)  an element

Question 15

Which of the following processes require(s) chemical methods?

Accepted Answer

A)  Separating a homogeneous mixture into pure substances. 
B)  Separating a heterogeneous mixture into pure substances. 
C)  Distilling a saltwater mixture. 
D)  Breaking a compound into its constituent elements. 
E)  At least two of the above (a-d) require chemical methods. 
A)  Separating a homogeneous mixture into pure substances. 
B)  Separating a heterogeneous mixture into pure substances. 
C)  Distilling a saltwater mixture. 
D)  Breaking a compound into its constituent elements. 
E)  At least two of the above (a-d) require chemical methods.

Question 16

Which of the following is an incorrect description?

Accepted Answer

A)  A homogeneous mixture. 
B)  A heterogeneous compound. 
C)  A solid element. 
D)  A mixture of solids. 
E)  A solution of gases. 
A)  A homogeneous mixture. 
B)  A heterogeneous compound. 
C)  A solid element. 
D)  A mixture of solids. 
E)  A solution of gases.

Question 17

Juice freezing into a popsicle is an example of a physical change.

Accepted Answer

A) True 
 B)False

Question 18

Which of the following is an element?

Accepted Answer

A)  iron 
B)  wood 
C)  water 
D)  blood 
E)  none of these 
A)  iron 
B)  wood 
C)  water 
D)  blood 
E)  none of these

Question 19

Which of the following involves a chemical change?

Accepted Answer

A)  boiling water 
B)  melting ice 
C)  chopping wood 
D)  cooking an egg 
E)  none of these 
A)  boiling water 
B)  melting ice 
C)  chopping wood 
D)  cooking an egg 
E)  none of these

Question 20

If iodine melts at 114°C and boils at 184°C, what is its physical state at 98°C?

Accepted Answer

The answer of If iodine melts at 114°C and boils...

Exam 3: Matter

Which of the following is an element?

Which of the following is only a physical change?

Which of the following is a physical change?

The process of filtering a sand-saltwater mixture is a ______________ process.

An example of a pure substance is

Diamond is a __________ state of matter.

A compound can consist of one kind of element.

The normal boiling point of water is 100oC, which is a physical property of the substance water.

Which is an example of a homogeneous mixture?

Which of these is a chemical property?

An element consists of only single atoms of that element.

An example of a mixture is

Which of the following processes is a chemical change?

Water is an example of

Which of the following processes require(s) chemical methods?

Which of the following is an incorrect description?

Juice freezing into a popsicle is an example of a physical change.

Which of the following is an element?

Which of the following involves a chemical change?

If iodine melts at 114°C and boils at 184°C, what is its physical state at 98°C?

Chemistry: an Introduction

Measurements and Calculations

Chemical Foundations: Elements, Atoms, and Ions

Nomenclature

Chemical Reactions: an Introduction

Reactions in Aqueous Solutions

Chemical Composition

Chemical Quantities

Energy

Modern Atomic Theory

Chemical Bonding

Gases

Liquids and Solids

Solutions

Acids and Bases

Equilibrium

Oxidation-Reduction Reactions and Electrochemistry

Radioactivity and Nuclear Energy

Organic Chemistry

Biochemistry

Filters

The normal boiling point of water is 100^oC, which is a physical property of the substance water.