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