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Chem H Ch 3 Semester Exam Review

Total questions: 98

Worksheet time: 49mins

Name
Class
Date
1.

Matter is defined as anything that is visible to the human eye.

a)

True

b)

False

2.

Even with the most recent advances in microscopy, it is impossible to image an atom.

a)

True

b)

False

3.

An amorphous solid has long range, repeating order.

a)

True

b)

False

4.

Gases are the only form of matter that is easily compressible.

a)

True

b)

False

5.

Liquids have definite volume and indefinite shape.

a)

True

b)

False

6.

Solids have indefinite shape and volume.

a)

True

b)

False

7.

In a solid substance, the atoms or molecules oscillate and vibrate about a fixed point.

a)

True

b)

False

8.

Liquid and gas molecules can easily be compressed, while in a solid the molecules are incompressible.

a)

True

b)

False

9.

A compound is a substance that cannot be broken down into a simpler substance.

a)

True

b)

False

10.

If a pure material decomposes when heated into simpler substances, this proves that the material was a compound.

a)

True

b)

False

11.

Water is a mixture.

a)

True

b)

False

12.

Saltwater is a homogeneous mixture.

a)

True

b)

False

13.

Skim milk is a heterogeneous mixture.

a)

True

b)

False

14.

Air is a pure substance.

a)

True

b)

False

15.

Sugar is a pure substance.

a)

True

b)

False

16.

Chemical properties of a substance are those that can be observed without changing the composition of a substance.

a)

True

b)

False

17.

Flammability of gasoline is a chemical property.

a)

True

b)

False

18.

The odor of gasoline is a chemical property.

a)

True

b)

False

19.

In a chemical reaction, the substances present after the chemical change are called reactants.

a)

True

b)

False

20.

The melting of ice is a physical change.

a)

True

b)

False

21.

Mixtures of miscible liquids that differ in their boiling points may be separated by distillation.

a)

True

b)

False

22.

The corrosion of iron is a physical change.

a)

True

b)

False

23.

An example of a chemical change is burning a wood log to give a pile of ashes.

a)

True

b)

False

24.

In physical changes, the atoms or molecules that compose the matter do not change their identity, even though the matter may change its appearance.

a)

True

b)

False

25.

When you dissolve solid sugar into water, this new solution will taste sweet. The sugar went through a chemical change.

a)

True

b)

False

26.

A chemical change occurs when matter does not change its composition.

a)

True

b)

False

27.

Matter can be destroyed in a combustion reaction (such as burning fuel).

a)

True

b)

False

28.

Like mass, energy can neither be created nor destroyed.

a)

True

b)

False

29.

The energy of position is called kinetic energy.

a)

True

b)

False

30.

A moving bowling ball has kinetic energy.

a)

True

b)

False

31.

Electrical energy is associated with the flow of electrical charge.

a)

True

b)

False

32.

A melting scoop of ice cream is an example of an exothermic process.

a)

True

b)

False

33.

When a chemical "cold pack" is activated, the chemical reactants absorb heat from the surroundings.

a)

True

b)

False

34.

The process of boiling water is an endothermic process.

a)

True

b)

False

35.

A chemical change that will lower the potential energy of the chemical results in an endothermic reaction.

a)

True

b)

False

36.

An energy diagram that shows the products having higher energy than the reactants illustrates an endothermic reaction.

a)

True

b)

False

37.

Temperature is simply a measure of the motion of atoms and molecules.

a)

True

b)

False

38.

Temperature is defined as the transfer of thermal energy caused by a temperature difference.

a)

True

b)

False

39.

When a cold ice cube is dropped into a warm cup of water, energy is transferred as heat from the ice to the water.

a)

True

b)

False

40.

The coldest temperature possible is 0 K.

a)

True

b)

False

41.

Temperatures reported in the Kelvin scale cannot be negative.

a)

True

b)

False

42.

When a temperature in degrees Celsius is converted to kelvins, the Kelvin value will have the same number of decimal places as the Celsius value.

a)

True

b)

False

43.

Absolute zero is equivalent to a temperature of -273 K.

a)

True

b)

False

44.

A kelvin degree is the same size as a Celsius degree.

a)

True

b)

False

45.

The temperature of 0°F is colder than the temperature of 0°C.

a)

True

b)

False

46.

The amount of heat energy needed to increase the temperature of an object will vary depending on the heat capacity of the object.

a)

True

b)

False

47.

The heat capacity of a substance is the quantity of thermal heat required to change the temperature of a given amount of the substance by 100°C.

a)

True

b)

False

48.

The large heat capacity of water limits large fluctuations in temperature near bodies of water during the summer months.

a)

True

b)

False

49.

Which of the following statements about matter is FALSE?

a)

Matter occupies space and has mass.

b)

Matter exists in either a solid, liquid or gas state.

c)

Matter is ultimately composed of atoms.

d)

Matter is smooth and continuous.

e)

none of the above

50.

Which of the following is NOT an example of matter?

a)

a pencil eraser

b)

a balloon full of helium

c)

a dust particle

d)

heat from a burning candle

e)

none of the above

51.

A solid form of matter in which there is long range repeating order is called _______.

a)

A) crystalline

b)

B) amorphous

c)

C) liquid

d)

D) plasma

52.

Which state of matter has atomic spacing that is close together and indefinite shape?

a)

liquid

b)

solid

c)

gas

d)

plasma

e)

none of the above

53.

Which state of matter has indefinite shape and is compressible?

a)

liquid

b)

solid

c)

gas

d)

plasma

54.

Which state of matter has atomic spacing that is close together and definite shape?

a)

liquid

b)

solid

c)

gas

d)

plasma

e)

none of the above

55.

7) Which among the following statements is FALSE?

a)

The correct answer is option A.

b)

Option B is true.

c)

Option C is true.

d)

Option D is true.

56.

Which state of matter has atomic spacing that is far apart and definite shape?

a)

liquid

b)

solid

c)

gas

d)

plasma

e)

none of the above

57.

Which of the following is an example of a crystalline solid that shows an arrangement of long-range, repeating order?

a)

glass

b)

salt

c)

plastic

d)

rubber

e)

none of the above

58.

A pure substance is:

a)

composed of two or more different types of atoms or molecules combined in variable proportions.

b)

composed of only one type of atom or molecule.

c)

composed of two or more regions with different compositions.

d)

composed of two or more different types of atoms or molecules that has constant composition.

e)

none of the above

59.

Which of the following items is a pure substance?

a)

air

b)

seawater

c)

brass

d)

ice

e)

none of the above

60.

Which of the following items is a mixture?

a)

water

b)

helium

c)

brass

d)

sugar

e)

none of the above

61.

Which of the following is a heterogenous mixture?

a)

milk

b)

sugar water

c)

raisin bran

d)

air

e)

none of the above

62.

Which of the following is a homogeneous mixture?

a)

trail mix

b)

stainless steel

c)

water

d)

molten iron

e)

none of the above

63.

Which of the following statements about compounds is TRUE?

a)

A substance that cannot be broken down into simpler substances.

b)

A pure substance that has variable composition throughout.

c)

A substance composed of two or more elements in fixed, definite proportions.

d)

A substance that is not as common as pure elements.

e)

none of the above

64.

Which of the following statements is FALSE?

a)

A) Matter may be a pure substance or it may be a mixture.

b)

B) A pure substance may either be an element or a compound.

c)

C) A mixture may be either homogeneous or heterogeneous.

d)

D) Mixtures may be composed of two or more elements, two or more compounds, or a combination of both.

e)

E) All of the above statements are true.

65.

How would you classify salt water?

a)

pure substance-compound

b)

mixture-heterogeneous

c)

pure substance-element

d)

mixture-homogeneous

e)

none of the above

66.

How would you classify raisin bran?

a)

pure substance-compound

b)

mixture-heterogeneous

c)

pure substance-element

d)

mixture-homogeneous

e)

none of the above

67.

How would you classify sugar?

a)

pure substance-compound

b)

mixture-heterogeneous

c)

pure substance-element

d)

mixture-homogeneous

e)

none of the above

68.

A solution is an example of a (an):

a)

pure substance.

b)

element.

c)

compound.

d)

homogeneous mixture.

e)

heterogeneous mixture.

69.

Physical properties are:

a)

those that a substance displays only through changing its composition.

b)

those that cause atoms and molecules to change.

c)

those that a substance displays without changing its composition.

d)

identical for all solid matter.

e)

none of the above

70.

All of the following can be considered physical properties EXCEPT:

a)

taste.

b)

color.

c)

flammability.

d)

density.

e)

boiling point.

71.

Which of the following items is a physical property?

a)

the corrosive action of acid rain on granite

b)

the odor of spearmint gum

c)

the combustion of gasoline

d)

the tarnishing of a copper statue

e)

none of the above

72.

Which of the following is NOT an example of a physical property?

a)

Solid ice can be very brittle.

b)

Water can freeze solid at 32 degrees Fahrenheit.

c)

Water can form hydrogen and oxygen gas under electrolysis conditions.

d)

Liquid water can turn into steam in a heated tea kettle.

73.

Which of the following items is a chemical property?

a)

the paint color on a new red Corvette

b)

the odor of spearmint gum

c)

the melting and boiling point of water

d)

the tarnishing of a copper statue

e)

none of the above

74.

26) Which of the following statements about physical and chemical changes is FALSE?

a)

A physical change does not alter the chemical composition of a substance.

b)

A chemical change results in the formation of new substances.

c)

Physical changes are always reversible, while chemical changes are always irreversible.

d)

Energy is often absorbed or released during a chemical change.

75.

If you hold a solid piece of pure gallium metal in your hand, your body heat will melt the gallium into its liquid form. This illustrates which of the following?

a)

distillation

b)

physical change

c)

chemical change

d)

chemical property

e)

none of the above

76.

Which of the following is NOT a technique that could be used to separate a mixture into its components?

a)

stirring

b)

decanting

c)

filtration

d)

distillation

e)

none of the above

77.

When methane is burned with oxygen the products are carbon dioxide and water. If you produce 36 grams of water and 44 grams of carbon dioxide from 16 grams of methane, how many grams of oxygen were needed for the reaction?

a)

32

b)

80

c)

96

d)

64

e)

none of the above

78.

When methane is burned with oxygen, the products are carbon dioxide and water. If you produce 18 grams of water from 8 grams of methane and 32 grams of oxygen, how many grams of carbon dioxide were produced in the reaction?

a)

40

b)

22

c)

58

d)

18

e)

none of the above

79.

When methane is burned with oxygen, the products are carbon dioxide and water. If you produce 9 grams of water and 11 grams of carbon dioxide from 16 grams of oxygen, how many grams of methane were needed for the reaction?

a)

4

b)

20

c)

31

d)

40

e)

none of the above

80.

Which of the following statements about energy is FALSE?

a)

An object possessing energy can do work on another object.

b)

Energy can neither be created nor destroyed.

c)

Energy is the single main component of the universe.

d)

Energy is the capacity to do work.

e)

All of the above statements are true.

81.

Which type of energy is associated with motion?

a)

chemical

b)

electrical

c)

potential

d)

kinetic

e)

none of the above

82.

Which type of energy is associated with position?

a)

chemical

b)

electrical

c)

potential

d)

kinetic

e)

none of the above

83.

What type of energy is associated with the burning of gasoline?

a)

kinetic

b)

potential

c)

electrical

d)

chemical

e)

none of the above

84.

Which of the following items is NOT a common unit of energy?

a)

joule

b)

torr

c)

calorie

d)

kilowatt-hour

e)

none of the above

85.

How many calories are there in a 255 Calorie snack bar?

a)

2.55×1052.55 \times 10^5

b)

1.07 × 10^3

c)

60.9

d)

1×1031 \times 10^3

e)

none of the above

86.

How many joules are there in a 255 calorie snack bar?

a)

2.55×1052.55 \times 10^5

b)

1.07×1061.07 \times 10^6

c)

1.07×1031.07 \times 10^3

d)

6.09×1046.09 \times 10^4

e)

none of the above

87.

How many kilojoules are there in 95.0 Calories?

a)

2.27×1072.27 \times 10^7

b)

3.97×10−43.97 \times 10^{-4}

c)

397

d)

22.7

e)

none of the above

88.

If a particular process is endothermic, the reverse process must be a (an):

a)

chemical change.

b)

isothermal process.

c)

exothermic process.

d)

endothermic process.

e)

none of the above

89.

An energy diagram that shows the reactants having greater energy than the products illustrates an:

a)

endothermic reaction.

b)

exothermic reaction.

c)

isothermic reaction.

d)

impossible reaction.

e)

none of the above

90.

If a solid piece of shiny sodium metal is exposed to chlorine gas, a large amount of heat is released and the white solid sodium chloride (table salt) forms. Based on this information, which of the following statements is TRUE?

a)

This process represents a physical change.

b)

Mass is lost during this process.

c)

Sodium chloride is an element.

d)

This process was exothermic.

e)

none of the above

91.

In order, what is the freezing point, room temperature and boiling point of water according to the Fahrenheit scale?

a)

32-75-212

b)

0-75-100

c)

0-25-100

d)

0-298-373

e)

none of the above

92.

In order, what is the freezing point, room temperature and boiling point of water according to the Celsius scale?

a)

32-75-212

b)

0-75-100

c)

0-25-100

d)

0-298-373

e)

none of the above

93.

Which of the following is NOT true?

a)

The degree "symbol" is not used with the Kelvin scale.

b)

A kelvin degree is the same size as a Celsius degree.

c)

The Kelvin temperature scale avoids use of negative numbers.

d)

Water boils at the same temperature value on both the Kelvin and Celsius scales.

e)

none of the above

94.

The boiling point of water is:

(1)  212 °F (2)  0°C      (3)  373 K

a)

1 and 2 only

b)

2 and 3 only

c)

1 and 3 only

d)

all of 1, 2, and 3

e)

none of 1, 2, and 3

95.

What is the value of 27°C on the Kelvin temperature scale?

a)

273

b)

246

c)

300

d)

81

e)

none of the above

96.

What is the value of 335 K on the Celsius temperature scale?

a)

62

b)

167

c)

608

d)

66.4

e)

none of the above

97.

Melting point can be defined as the temperature when a solid becomes a liquid. The melting point of the chemical acetone is -95°C. Which state of matter would you expect to exist for acetone at a temperature of -94°C?

a)

solid

b)

liquid

c)

gas

d)

plasma

98.

In calculating the relationship between the amount of heat added to a substance and the corresponding temperature change, the specific heat capacity is usually represented by which symbol?

a)

C

b)

q

c)

ΔT

d)

m

e)

K

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