Deck 1: What Is Chemistry

Question 1

By what chemical symbol do we know the element chromium?

A)Cr
B)Co
C)C
D)Cs

Answer 1

Cr

Question 2

Which of the following is a compound?

A)F_2(g)
B)O_2(g)
C)Na_(s)
D)H₂O_2(l)

Answer 2

H₂O_2(l)

Question 3

What chemical symbol has been given to the element sodium?

A)S
B)K
C)Na
D)Sr

Answer 3

Na

Question 4

What is the name of the element whose symbol is "Co"?

A)Carbon
B)Chromium
C)Coal
D)Cobalt

Question 5

Which of the following represents a physical change only?

A)barbecuing a steak
B)adding electricity to water to produce hydrogen and oxygen gas
C)chopping a piece of wood
D)burning a propane camping stove

Question 6

Which of the following represents a chemical property of a specific metal?

A)It has magnetic properties.
B)It melts at 800 °C.
C)Its density is higher than that of water.
D)When in contact with air it corrodes.

Question 7

Which of the following may not be classified as matter?

A)tooth filling
B)sand
C)heat
D)seawater

Question 8

Which of the following is a pure, elemental substance?

A)Br_2(l)
B)SO_2(g)
C)H₂O_(l)
D)air

Question 9

Which of the following represents a chemical change?

A)sugar dissolving into hot coffee
B)ice melting to form liquid water
C)water boiling to form steam
D)steel turning to rust in salt air

Question 10

A dilute sugar solution is an example of a(n)________.

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

Question 11

Which element pair is incorrect?

A)Au - gold
B)Pb - iron
C)Ag - silver
D)Hg - mercury
E)Mg - magnesium

Question 12

What is the name given to the element with the symbol "K"?

A)Kallium
B)Potassium
C)Phosphorus
D)Krypton

Question 13

Which of the following represents a physical change only?

A)steel turning to rust in salt air
B)liquid water freezing into ice cubes
C)milk turning "sour"
D)wood burning to form ashes

Question 14

Which of the following is an example of a heterogeneous mixture?

A)seawater
B)steel
C)milk
D)chicken noodle soup

Question 15

What is another name for a homogeneous mixture?

A)pure substance
B)compound
C)solution
D)element

Question 16

Which of the following is an example of a homogenous mixture?

A)sand
B)copper
C)air
D)sugar

Question 17

What is the name given to the element with the symbol "As"?

A)silver
B)argon
C)antimony
D)arsenic
E)astatine

Question 18

Which of the following represents a chemical change?

A)sublimation of dry ice
B)molding melted silver
C)frying an egg
D)breaking a piece of glass

Question 19

By what chemical symbol do we know the element magnesium?

A)Mn
B)Ma
C)M
D)Mg

Question 20

What is the name given to the element with the symbol "P"?

A)Polonium
B)Protactinium
C)Phosphorus
D)Palladium

Question 21

The chemical compounds CO and CO₂ have exactly the same properties, because both are made from carbon and oxygen.

Question 22

The "disappearance" of mothballs is an example of ________.

A)melting
B)evaporation
C)condensation
D)sublimation

Question 23

Iced tea, with sugar completely dissolved in it, is an example of homogeneous matter.

Question 24

Which of the following is not a chemical property of carbon dioxide?

A)It is a critical component in photosynthesis.
B)It is used in fire extinguishers because it does not support combustion.
C)It is used to pump up bicycle tires.
D)It is soluble in blood.

Question 25

A theory summarizes facts in general statements.

Question 26

Which term best completes this definition? An attempt to explain why a law exists is a(n)________.

A)experiment
B)law
C)theory
D)model

Question 27

The smallest possible piece of gold which still retains all the properties of gold is a cube shape containing eight gold atoms.

Question 28

Which of the following represents a physical property?

A)Sodium metal is extremely reactive with chlorine gas.
B)Mercury is a shiny liquid at room temperature.
C)The tendency of aluminum to "oxidize"
D)The flammability of butane fuel.
E)The unreactive nature of argon gas

Question 29

An atom is the smallest possible single piece of an element that still retains all the properties of that element.

Question 30

Which of the following is a pure substance?

A)blood
B)block of aluminum
C)air
D)orange juice

Question 31

The only way one can change an element to another is via ________.

A)a chemical reaction
B)a physical reaction
C)a nuclear reaction
D)applying heat

Question 32

The earth, taken together as a unit, may be considered one very large piece of heterogeneous matter.

Question 33

When milk goes "sour," only a physical change has occurred.

Question 34

The term used to describe the conversion from a solid state to a gaseous state is ________.

A)melting
B)evaporation
C)condensation
D)sublimation

Question 35

Which of the following cannot be classified as matter?

A)air
B)temperature
C)fog
D)oxygen molecule

Question 36

The term used to describe the conversion from a gaseous state to a liquid state is ________.

A)melting
B)evaporation
C)condensation
D)sublimation

Question 37

Which of the following can be classified as matter?

A)ice
B)sugar
C)graphite
D)All of the above are matter.

Question 38

It is scientifically proper to construct a theory without then doing any experiments to test it.

Question 39

Water is heterogeneous matter because it is made from twice as much hydrogen as oxygen (H₂O).

Question 40

What is the correct statement about an atom?

A)It is always pure.
B)It is the smallest particle of an element.
C)It is the smallest particle of a molecule.
D)It can be isolated.

Question 46

Evaporated ethanol can be isolated by cooling, without changing its disinfectant properties.

Question 47

A physical picture used to illustrate a theory is a model.

Question 48

Match the event with the name of the process from the list below.

Question 49

Match the substances with its classification from the list below.

Question 50

Tap water is a homogeneous mixture, while freshly distilled water is a compound.

Question 51

Match the event with the type of process involved from the list below.

Question 52

Cooking vegetables with steam is a chemical process.

Question 53

Match the element with the symbol from the list below.

Question 54

If 1 gram of ice needs a certain amount of heat to melt, the same amount of energy must be removed to convert it back to ice at its melting point.

Question 55

Air is a homogeneous mixture of nitrogen, oxygen and hydrogen.

Question 56

Match the element with the symbol from the list below.