Chemistry: Sample Exam Questions
1.
A substance’s ability to resist being
scratched is the physical property of matter
known as….
a. ductility
b. malleability
c. hardness
d. conductivity
7.
A cloudy mixture in which particles of the
suspended substance are so small they
cannot easily be separated out is called a…
a. mechanical mixture
b. suspension
c. colloid
d. solution
2.
Ductility is the physical property of…
a. being able to conduct electricity
b. the amount of mass in a given
volume
c. being stretched into a long wire
d. being pounded or rolled into sheets
8.
An octagon symbol means….
a. Caution
b. Warning
c. Danger
d. special care
9.
This symbol means…
3.
Which of the following is NOT evidence of
a chemical change?
a. State change
b. Gas formation
c. Color change
d. Precipitate formation
4.
5.
6.
Which of the following is a chemical
change?
a. Sugar dissolved in water
b. A cooked steak
c. A crushed piece of chalk
d. The wax of a candle melts as the
candle burns
To help identify substance X, Sydney the
Swashbuckler of Science listed 4 properties:
a. Reacts with water to form rust
b. Appears to be a shiny, silver metal
c. Has a melting point of 212ºC
d. Conducts electricity
How many physical and chemical properties
are there?
a. 1 chemical, 3 physical
b. 2 chemical, 2 physical
c. 3 chemical, 1 physical
d. 0 chemical, 4 physical
The difference between an element and a
compound is that an element…
a. is a pure substance and a compound
is a mixture
b. has only one substance, while a
compound has more than one
substance
c. can be made into a mixture, but a
compound cannot
d. can be a pure substance, while a
compound cannot be a pure
substance
a.
b.
c.
d.
flammable
corrosive
dangerously reactive
biohazardous
10. Chemical fire starter ignites a campfire from
the following reaction:
2 CH3OH(l) + 3 O2(g)  2 CO2(g) + 4 H2O(l)
Methanol + Oxygen  Carbon Dioxide +
Water
What are the reactants?
a. Methanol and water
b. Oxygen and carbon dioxide
c. Methanol and oxygen
d. Carbon dioxide and water
11. To treat an injury in sport, cold packs are
used to reduce swelling. This is an example
of…
a. endothermic reactions
b. exothermic reactions
c. combustion reactions
d. corrosion reactions
12. Chewing on a tums tablet enables the
reaction that occurs in our mouth and body
to happen faster. This is because we have
increased the…
a. surface area
b. concentration
c. temperature
d. work of enzymes
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Chemistry: Sample Exam Questions
13. The periodic table is organized by the
patterns of the properties of the elements.
The rows in the period table vary with the
amount of elements they contain. These
rows are called…
a. groups
b. families
c. periods
d. metals
14. The characteristic Dimitri Mendeleev used
to create the pattern we now call the periodic
table is…
a. color
b. atomic number
c. atomic mass
d. symbol
15. John Dalton’s theory proposed that:
a. atoms have a core called a nucleus
b. invisible electrons were part of an
atom
c. all atoms of an element have the
same mass and size
d. the neutrons in an atom carry no
charge
16. Several models of what the atoms may have
looked like were made. One of the earlier
models, representing the atom as a
positively charged sphere with negatively
charged electrons embedded, was developed
by:
a. Bohr
b. Thompson
c. Nagaoka
d. Rutherford
17. The current atomic theory states that:
a. protons, neutrons and electrons are
equal in mass
b. the mass of protons is so small that
it is not considered in atomic mass
calculations
c. the atomic mass of an element is
the sum of neutrons and electrons
d. positively charged particles are
found in the nucleus
18. The normal ionic charge of calcium is 2+.
This means that the calcium ion
a. Lost 2 protons
b. Gained 2 electrons
c. Lost 2 electrons
d. Gained 2 protons
19. Potassium has an atomic number of 19 and a
mass of 39.10. How many neutrons does one
atom of potassium contain?
a. 39
b. 19
c. 20
d. 48
20. When ionic compounds are formed, the ions
combine to form a…
a. crystal
b. block
c. irregular pattern
d. cloud
21. Use the information in the following table to
answer this question.
Compound
Melting Point
Boiling Point
(ºC)
(ºC)
Baking soda
455
1550
Carbon dioxide
Sublimates
-79
Rubbing alcohol -90
82
Salt
801
1413
The molecular compounds from the table above
are…
a. baking soda and salt
b. rubbing alcohol and salt
c. carbon dioxide and baking soda
d. carbon dioxide and rubbing
alcohol
22. What is the chemical name for CaO?
a. Calcium oxygen
b. Calcium oxide
c. Calcide oxygen
d. Calcide oxide
23. What is the common name for CaCl2?
a. Sour gas
b. Table sale
c. Lime
d. Road salt
24. N2O3 is a molecular compound. The
chemical name is…
a. trinitrogen oxide
b. dinitrogen oxide
c. trinitrogen dioxide
d. dinitrogen trioxide
25. The chemical formula for calcium chloride
is…
a. Ca2Cl
b. CaCl2
c. 2CaCl
d. Ca2Cl
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