Deck 3: Matter

Question 1

In a chemical change,

A) a phase change must occur
B) the original material can never be regenerated
C) a phase change never occurs
D) the products are different substances from the starting materials

Answer 1

the products are different substances from the starting materials

Question 2

If iodine melts at 114°C and boils at 184°C, what is its physical state at 250°C?

Answer 2

gas

Question 3

Which of the following is 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.

Answer 3

Sugar dissolves in coffee.

Question 4

The state of matter for an object that has neither definite shape nor definite volume is

A) solid
B) liquid
C) gaseous
D) elemental
E) mixed

Question 5

Which of the following involves no chemical change?

A) burning paper
B) boiling water
C) baking a cake
D) lighting a match
E) driving a car

Question 6

How many of the following are pure compounds? sodium, sugar, oxygen, air, iron

A) 1
B) 2
C) 3
D) 4
E) 5

Question 7

Which of these is a chemical property?

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 8

Which of the following describes a chemical property of gold?

A) Gold is a yellow metal.
B) Gold is an inert (nonreactive) metal.
C) Gold is a soft metal.
D) Gold is a very dense metal.
E) Gold is a good conductor of heat and electricity.

Question 9

All ______________ changes are ______________ changes.

Question 10

The state of matter for an object that has a definite volume but not a definite shape is

A) solid
B) liquid
C) gaseous
D) elemental
E) mixed

Question 11

If iodine melts at 114°C and boils at 184°C, what is its physical state at 120°C?

Question 12

An example of a chemical change is

A) boiling alcohol
B) grinding coffee beans.
C) digesting a pizza
D) coffee spilled on a shirt
E) an ice cube melting in a drink

Question 13

Classify each of the following as a physical (P) or a chemical (C) change.
______________ a. cooking an egg
______________ b. boiling water
______________ c. ironing a shirt
______________ d. burning gasoline
______________ e. decomposing water
______________ f. evaporating alcohol
______________ g. sanding a table top
______________ h. grinding grain
______________ i. fermenting fruit juice
______________ j. dissolving sugar in water

Question 14

Which of the following is a physical change?

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

Question 15

The state of matter for an object that has both definite volume and definite shape is

A) solid
B) liquid
C) gaseous
D) elemental
E) mixed

Question 16

Anything that has mass and volume is called ______________.

Question 17

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

Question 18

Which of the following is a chemical change?

A) Water condenses on a mirror.
B) A damp towel dries.
C) Peanuts are crushed.
D) A "tin" can rusts.
E) At least two of the above (a-d) exhibit a chemical change.

Question 19

Which of the following is a chemical change?

A) water boiling
B) gasoline evaporating
C) butter melting
D) sugar dissolving in water
E) paper burning

Question 20

Which of the following involves a chemical change?

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

Question 21

A solution can be distinguished from a compound by its

A) variable composition
B) liquid state
C) heterogeneous nature
D) lack of color

Question 22

Classify each of the following as an element (E), a compound (C), or a mixture (M).
a. 14K gold _____________
b. pure silver _____________
c. aluminum _____________
d. distilled water _____________
e. tap water _____________
f. brass _____________
g. tungsten _____________
h. sodium chloride _____________
i. air _____________

Question 23

Classify each of the following as an element (A), a compound (B), a homogeneous mixture (C), or a heterogeneous mixture (D).
a. table salt
______________
b. chlorine gas
______________
c. sand in water
______________
d. petroleum
______________
e. caffeine
______________

Question 24

Which is an example of a homogeneous mixture?

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

Question 25

An example of a pure substance is

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

Question 26

An example of a mixture is

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

Question 27

Which of the following processes require(s) 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 28

Which of the following is an incorrect description?

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

Question 29

Which of the following processes is a chemical change?

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 30

Water is an example of

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

Question 31

Which of the following is an element?

A) helium
B) salt
C) alcohol
D) vinegar
E) sugar

Question 32

Which of these is an element?

A) water
B) iron ore
C) wood
D) silver
E) brass

Question 33

A compound can consist of one kind of element.

Question 34

A homogeneous mixture is also called _______________.

A) a heterogeneous mixture.
B) a pure substance.
C) a compound.
D) a solution.
E) an element.

Question 35

Which of the following is an element?

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

Question 36

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

Question 37

Helium is an example of

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

Question 38

Which of the following is an element?

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

Question 39

A(n) ___________ always has the same composition.

Question 40

How many of the following are compounds? H₂O, N₂O₄, NaOH, MnO₂, HF

A) 1
B) 2
C) 3
D) 4
E) 5

Question 41

Gold is a relatively soft metal, which is a chemical property of the substance gold.

Question 42

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

Question 43

A solid substance is not considered matter.

Question 44

A __________ change involves a change in the fundamental components of the substance; a given substance changes into a different substance or substances.

A) chemical
B) physical
C) mixed
D) potential
E) kinetic

Question 45

An element consists of only single atoms of that element.

Question 46

Dry ice subliming (turning from a solid straight into a gas) is an example of a chemical change.

Question 47

How many of the following are pure substances? (Check all that apply.)

A) water
B) air
C) carbon
D) brass
E)gold
F) ammonia

Question 48

Diamond is a __________ state of matter.

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

Question 49

Two or more atoms bonded together always form a compound.

Question 50

Metal rusting is an example of a chemical change.

Question 51

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

Question 52

Carbon dioxide can exist only in the gaseous state.

Question 53

How many of the following are compounds? (Check all that apply.)

A) water
B) air
C) carbon
D) brass
E)gold
F) ammonia

Question 54

A __________ change involves a change in one or more physical properties, but no change in the fundamental components that make up the substance.

A) chemical
B) physical
C) mixed
D) potential
E) kinetic

Question 55

Which of the following is a homogeneous mixture?

A) pure water
B) gasoline
C) jar of jelly beans
D) soil
E) copper metal