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Chemical And Physical
Test Description: Chemical and Physical Changes and Properties
Instructions: Answer all questions to get your test result.
1) During a chemical change a __________ occurs and new molecules are formed.
A
physical change
B
all of the above
C
physical reaction
D
chemical reaction
2) Which of the following could indicate that a chemical reaction took place?
A
thermal energy change
B
all of the choices
C
color change
D
gas formation
3) Which of the following is an example of a chemical change?
A
solid metal melting into liquid metal
B
wire conducting electricity
C
mixing sand and water
D
an acid and a base reacting to form a salt and water
4) If the chemical properties of a substance remain unchanged and the appearance or shape of the substance changes it is called a
A
physical change
B
all of the choices
C
chemical reaction
D
chemical change
5) Which of the following is considered a physical change?
A
melting steel
B
all of the choices are physical changes
C
shredding paper
D
crushing a can
6) Iron and sulfur change and form a partially magnetic black and yellow mixture.
A
Chemophysical change
B
Physical Change
C
Physochemical change
D
Chemical Change
7) Dry Ice (solid carbon dioxide - CO2) is sublimated at room temperature to a CO2 vapor.
A
physical change
B
chemical change
C
Chemophysical change
D
Physochemical change
8) Zinc when immersed in Hydrocholoric Acid produces hydrogen gas.
A
Chemical Change
B
Physical Change
C
Physochemical change
D
Chemophysical change
9) What is not a possible sign of a chemical change?
A
color change
B
heat given off
C
light given off
D
a change of state
10) An odor being given off can indicate a __________.
A
change in density
B
physical change
C
chemical reaction
D
change of state
11) During a chemical change, a substance __________.
A
loses physical properties
B
remains the same
C
changes into another substance
D
loses chemical properties
12) When does a physical change occur?
A
When elements bond to form a molecule.
B
When chemical bonds are broken and new substances form.
C
When the size, shape, or state of matter changes.
D
When a new element is created.
13) Generally, which type of change is most easily reversed?
A
physical
B
electrical
C
chemical
D
molecular
14) Which of the following would most likely cause matter to chemically change?
A
none of the choices
B
slight pressure
C
motion
D
extreme heat
15) A scientist places 10 mL of water in a test tube and heats the liquid over a Bunsen burner for 2 minutes. The liquid boils and escapes as steam. This experiment is a good example of
A
physical change involving phase changes
B
physical change involving chemical reactions
C
chemical change involving chemical reactions
D
chemical change involving phase changes
16) Which is not an example of a physical property?
A
density
B
color
C
texture
D
flammability
17) Which type of property describes the potential to undergo a chemical change?
A
extensive property
B
intensive property
C
physical property
D
chemical property
18) Which of the following is an example of a chemical property of a substance?
A
volume
B
mass
C
types of chemical bonds it will form
D
melting and boiling points
19) Which of the following is not a physical property of sugar?
A
It is a solid at room temperature.
B
It is white in color.
C
It is less dense as a liquid than as a solid.
D
It is digestible by enzymes in the stomach.
20) Venom of the box jellyfish is very toxic to humans. Toxicity of the venom is a __________ property.
A
intensive
B
physical
C
extensive
D
chemical
*select an answer for all questions
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