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