Deck 1: An Introduction to Chemistry

Question 1

Which is a pure substance?

A)compound
B)mixture
C)solution
D)both B and C

Answer 1

compound

Question 2

Which has both a definite shape and a definite volume?

A)solid
B)vapor
C)gas
D)liquid

Answer 2

solid

Question 3

Which phase of matter contains the least force of attraction between particles?

A)solid
B)gas
C)crystal
D)liquid

Answer 3

gas

Question 4

Why study chemistry?

A)To help inform us about our world
B)To be better able to make informed decisions
C)To help us learn a technique for identifying and solving problems
D)All the above

Question 5

Which phase of matter contains the greatest force of attraction between particles?

A)solid
B)vapor
C)liquid
D)gas

Question 6

In which phase of matter are the particles furthest apart?

A)gas
B)solid
C)liquid
D)crystal

Question 7

Which phase of matter can be compressed or expanded to the greatest degree?

A)solid
B)gas
C)crystal
D)liquid

Question 8

Which is an observation?

A)Atoms consist of protons,neutrons,and electrons.
B)All matter is composed of atoms.
C)Water is colorless.
D)Atoms can form chemical bonds by sharing electrons.

Question 9

A simple statement of natural phenomena to which no exceptions are known under given conditions is a(n)

A)theory
B)observation
C)model
D)scientific law

Question 10

The statement,"An apple a day keeps the doctor away",is best described as a(n)

A)observation
B)law
C)theory
D)hypothesis

Question 11

Which state of matter consists of particles in regular,repeating,three dimensional geometrical patterns?

A)liquid
B)vapor
C)solid
D)gas

Question 12

Which state of matter consists of particles held together firmly but not rigidly? These particles are held together by strong attractive forces,are in close contact with one another,
But are able to flow by one another.

A)gas
B)liquid
C)solid
D)vapor

Question 13

The science of chemistry may involve:

A)observation
B)hypothesis development
C)experimentation
D)all the above

Question 14

Which has neither a definite shape nor a definite volume?

A)crystal
B)solid
C)gas
D)liquid

Question 15

A well established hypothesis is often called a(n)

A)observation
B)fact
C)theory
D)law

Question 16

The statement,"An atom consists of a dense nucleus surrounded by a cloud of electrons", is best described as a(n)

A)theory
B)law
C)hypothesis
D)observation

Question 17

Which is composed of particles with enough energy to completely overcome the attractive forces between them?

A)solid
B)gas
C)liquid
D)crystal

Question 18

Which is a scientific observation?

A)Freezing and boiling are called physical changes
B)Water freezes at zero degrees C
C)If a substance has a density of 1.00g/mL it must be water.
D)When a substance freezes its molecules lose potential energy.

Question 19

Which has a definite volume but no definite shape?

A)vapor
B)gas
C)solid
D)liquid

Question 20

A tentative explanation of certain facts that provides the basis for further experimentation is a(n)

A)observation
B)hypothesis
C)theory
D)law

Question 21

"Energy cannot be created nor destroyed,only transformed" is an example of a:

A)law
B)theory
C)observation
D)hypothesis

Question 22

A substance must be heterogeneous and have a fixed composition.

Question 23

A key feature of the scientific method is to design and perform experiments to test hypotheses.

Question 24

"When Jill opened the bottle containing a clear liquid,the whole room smelled likeroses." Based on this statement we can infer that:

A)The liquid is a homogeneous mixture.
B)The liquid is a compound.
C)Inside the bottle there were a liquid and a gas.
D)Opening the bottle caused the liquid to evaporate.

Question 25

Chemistry has applications in all other fields of science.

Question 26

Chemistry is the science that deals with the composition of substances and thetransformations they undergo.

Question 27

Which is a solution?

A)air
B)liquid water
C)solid iron
D)soil

Question 28

Which is a pure substance?

A)table salt
B)bronze
C)air
D)soil

Question 29

Which is a solution?

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

Question 30

A mixture of citric acid and water is classified as homogeneous.What can you conclude from this description?

A)citric acid and water are clear liquids
B)the relative amounts of citric acid and water may vary
C)citric acid is a solid
D)water is present in a larger quantity compared to citric acid

Question 31

Your lab instructor gives you a red solid and tells you that it is a pure substance.Which of the following statements is true given this information?

A)The solid has a fixed composition by mass.
B)The solid is a compound.
C)The solid cannot be decomposed into simpler substances.
D)The solid cannot be melted.

Question 32

Which is a pure substance existing as different phases in a heterogeneous system?

A)Salt dissolved in water.
B)Flour suspended in water.
C)Cork floating in water.
D)Ice floating in water.

Question 33

Which of the following diagrams represents a solution?

A)
B)
C)
D)

Question 34

" Life on Earth originated from the condensation of carbon monoxide molecules on hot mineral surfaces underground to form fatty acids,the building blocks of cellular membranes." This statement is an example of:

A)a theory
B)a hypothesis
C)a natural law
D)an observation

Question 35

What can you observe in the following beaker?

A)a pure substance in two phases.
B)a heterogeneous mixture
C)two compounds in the same phase
D)a homogeneous mixture

Question 36

Which is a mixture?

A)copper wire
B)sugar
C)water
D)mud

Question 37

Which is a pure substance ?

A)element
B)compound
C)mixture
D)both A and B

Question 38

In which phase do the particles possess the greatest amount of kinetic energy?

A)solid
B)liquid
C)gas
D)crystal

Question 39

Matter always has both mass and volume.

Question 40

Which of the following diagrams represents an element?

A)
B)
C)
D)

Question 41

The majority of the volume of a gas is empty space.

Question 42

Explain how the study of chemistry can be helpful to you in your everyday life.

Question 43

Suppose someone brought you an unidentified material.List five questions a chemist might ask in an attempt to identify the material.

Question 44

Matter is classified into substances and mixtures.
Explain how these are different.
Substances are either elements or compounds.Describe what these are and give examplesof each.
Mixtures can be either heterogeneous or homogeneous.Explain how these are differentand give examples of each.
What is a solution? Give examples of solutions.

Question 45

A substance may be heterogeneous or homogeneous.

Question 46

Air is a substance.

Question 47

A mixture may be heterogeneous or homogeneous.

Question 48

A liquid has a definite shape and a definite volume.

Question 49

If a piece of matter has no visible boundaries then it is a pure substance.

Question 50

Elements and compounds are the two types of pure substances.

Question 51

Explain what chemistry is.

Question 52

Define solid,liquid,and gas.
Explain the differences in the three phases of matter on both the macroscopic and
molecular levels.

Question 53

Name four different ways in which you could classify or organize twenty different types of
fasteners such as nails or screws.

Question 54

Mixtures can be separated by the differences in the physical properties of their
components.
What physical properties could be used to separate the components of the following mixtures?
A.Sand and salt
B.Salt and water
C.Iron filings and sulfur
D.Fine sand and coarse gravel

Question 55

State the four steps of the scientific method.

Question 56

Define matter.
Explain what is meant by mass and volume.
Is everything in nature matter? If not,what else exists?