Name: 
 

2001 Chemistry



Multiple Choice
Identify the choice that best completes the statement or answers the question.
 

 1. 

To remove the sand first and then the salt from a mixture of sand and salt water, one combination of techniques you could use would be to first
a.
evaporate and then distill
c.
filter and then evaporate
b.
evaporate and then condense
d.
filter and then condense
 

 2. 

Which is an example of a synthesis reaction?
a.
mc002-1.jpg
c.
mc002-3.jpg
b.
mc002-2.jpg
d.
mc002-4.jpg
 

 3. 


mc003-1.jpg

What would be the product(s) of this reaction?
a.
mc003-2.jpg
c.
mc003-4.jpg
b.
mc003-3.jpg
d.
mc003-5.jpg
 

 4. 

One of the main assumptions of the kinetic molecular theory of gases is that the particles of an ideal gas —
a.
must be single atoms instead of
molecules
c.
must be maintained at very high
pressures
b.
are in constant motion
d.
must be highly chemically reactive
 

 5. 

Which is the correct formula for iron (III) sulfate?
a.
mc005-1.jpg
c.
mc005-3.jpg
b.
mc005-2.jpg
d.
mc005-4.jpg
 

 6. 

Which of these represents the empirical formula and the molecular formula, respectively, for a given organic compound?
a.
mc006-1.jpg
c.
mc006-3.jpg
b.
mc006-2.jpg
d.
mc006-4.jpg
 

 7. 


mc007-1.jpg

What probably causes water to have the highest specific heat of the substances listed above?
a.
Molecule size
c.
Strong hydrogen bonds
b.
Molecular mass
d.
High density of ice
 

 8. 


mc008-1.jpg

a.
Beaker A because of increased surface area
c.
Beaker A because of a higher
concentration level
b.
Beaker B because of increased surface area
d.
Beaker B because of a higher
concentration level
 

 9. 

The element chlorine exists as two naturally occurring isotopes. Cl-35 occurs 75% of the time and Cl-37 occurs 25% of the time. Which of the following calculations should be used to calculate the correct average atomic mass of chlorine?
a.
mc009-1.jpg
c.
mc009-3.jpg
b.
mc009-2.jpg
d.
mc009-4.jpg
 

 10. 

The average kinetic energy of a sample of water molecules is —
a.
increased as the temperature is
decreased
c.
unaffected by temperature changes
b.
increased as the temperature is
increased
d.
always equal to zero
 

 11. 


mc011-1.jpg

Electronegativity differences are often helpful in determining the bond character between two atoms. A general rule states that if the electronegativity difference between two atoms is greater than 1.67, an ionic bond would most likely be formed. Using the chart above, which pair of atoms would probably form the strongest ionic bond?
a.
Al-P
c.
K-F
b.
Na-Cl
d.
Ca-O
 

 12. 

The mass of an object was recorded as 9.93 g, 9.90 g, and 10.02 g, using an electronic analytical balance. What is the average of these three masses expressed to the correct number of significant figures?
a.
9.9 g
c.
10.0 g
b.
9.95 g
d.
10.00 g
 

 13. 

Radioactive iodine-131 has a half-life of eight days. The amount of a 200.0 gram sample left after 32 days would be —
a.
6.25 g
c.
25.0 g
b.
12.5 g
d.
50.0 g
 

 14. 


mc014-1.jpg

mc014-2.jpg
a.
0.102 g
c.
1.85 g
b.
0.185 g
d.
185 g
 

 15. 

Which of these describes a tendency for atomic radii as displayed on the periodic chart?
a.
Atomic radii decrease left to right across a period.
c.
Atomic radii decrease top to bottom
down a group.
b.
Atomic radii increase left to right across a period.
d.
Atomic radii increase, then decrease
from top to bottom down a group.
 

 16. 


mc016-1.jpg

A student conducted an experiment and was interested in the mass of the product of the chemical reaction. Some results of the experiment are shown above. What is the mass of the NaCl?
a.
0.75 g
c.
2.25 g
b.
1.75 g
d.
2.50 g
 

 17. 


mc017-1.jpg

a.
0.66 M
c.
1.03 M
b.
0.97 M
d.
1.52 M
 

 18. 


mc018-1.jpg
a.
The water was not completely
evaporated from the compound.
c.
mc018-3.jpg
b.
mc018-2.jpg
d.
The atmospheric pressure prevented
complete reaction.
 

 19. 


mc019-1.jpg

a.
47%
c.
53%
b.
48%
d.
54%
 

 20. 


mc020-1.jpg

Which of these conclusions can be drawn from Rutherford’s experiment?
a.
Each atom contains electrons.
c.
Each atom contains protons.
b.
The nucleus of an atom can be split.
d.
Atoms are mostly empty space.
 

 21. 

How does the radioactive isotope C-14 differ from its stable counterpart C-12?
a.
It has a different number of protons and two less neutrons than C-12.
c.
It has the same number of protons but
two more neutrons than C-12.
b.
It has the same number of protons and
two more electrons than C-12.
d.
It has a different number of protons and two more neutrons than C-12.
 

 22. 

A compound has 50% sulfur and 50% oxygen. What is its empirical formula?
a.
mc022-1.jpg
c.
mc022-3.jpg
b.
mc022-2.jpg
d.
mc022-4.jpg
 

 23. 


mc023-1.jpg

An experiment yielded the above temperature and time information. What is the freezing point of the material in this experiment if the material is a solid at time zero?
a.
mc023-2.jpg
c.
mc023-4.jpg
b.
mc023-3.jpg
d.
mc023-5.jpg
 

 24. 


mc024-1.jpg
a.
mc024-2.jpg
c.
mc024-4.jpg
b.
mc024-3.jpg
d.
mc024-5.jpg
 

 25. 


mc025-1.jpg

The reaction shown above is —
a.
an endothermic reaction
c.
a decomposition reaction
b.
an exothermic reaction
d.
a double-replacement reaction
 

 26. 

Chlorine forms a 1– ion. How many electrons does a chloride ion have?
a.
1
c.
17
b.
16
d.
18
 

 27. 


mc027-1.jpg

According to the above data, which of the following represents the average density for sample X using the correct number of significant figures?
a.
1 g/mL
c.
0.81 g/mL
b.
0.8 g/mL
d.
0.821 g/mL
 

 28. 


mc028-1.jpg

mc028-2.jpg
a.
4.00 g
c.
16.0 g
b.
8.00 g
d.
32.0 g
 

 29. 


mc029-1.jpg

Which of the groups below has the electron dot structure shown above?
a.
Noble gases
c.
Alkali metals
b.
Halogens
d.
Transition elements
 

 30. 

A student must make a 3 M acid solution using a 5 M acid solution. Which of these is the safest way to make the solution?
a.
Slowly pour the 5 M acid into water
c.
Mix half the acid with water, then add
the remaining water
b.
Slowly add water to the 5 M acid
solution
d.
Mix half the water with the acid, then
add the remaining acid
 

 31. 


mc031-1.jpg

Four aqueous solutions and their concentrations are shown in the above illustration. Which of the solutions is most likely to be the strongest conductor of electricity?
a.
I
c.
III
b.
II
d.
IV
 

 32. 


mc032-1.jpg

a.
decreasing the air pressure
c.
increasing the heat being applied
b.
increasing the air pressure
d.
decreasing the volume of the container
 

 33. 

What is the first step that should be taken when a caustic chemical gets into a person’s eye?
a.
Identify the chemical
c.
Flush the affected area with water
b.
Call for an ambulance
d.
Apply a neutralizing agent
 

 34. 


mc034-1.jpg

According to the table, which of these probably has the strongest bonds?
a.
Hydrogen gas
c.
Sodium chloride
b.
Iron cyrstals
d.
Water
 

 35. 


mc035-1.jpg

a.
mc035-2.jpg
c.
mc035-4.jpg
b.
mc035-3.jpg
d.
mc035-5.jpg
 

 36. 

A catalyst accelerates a chemical reaction because the —
a.
catalyst decreases the number of
collisions in a reaction
c.
catalyst decreases the concentration of
the reactants
b.
activation energy of the reaction is
lowered in the presence of a catalyst
d.
temperature of the reaction increases
due to the catalyst
 

 37. 

A compound is composed of 58.8% C, 9.8% H, and 31.4% O, and the molar mass is 102 g/mol. What is the molecular formula for this compound?
a.
mc037-1.jpg
c.
mc037-3.jpg
b.
mc037-2.jpg
d.
mc037-4.jpg
 

 38. 

Which of these shows a volume of 1.25 liters expressed in milliliters?
a.
125 mL
c.
mc038-2.jpg
b.
mc038-1.jpg
d.
mc038-3.jpg
 

 39. 


mc039-1.jpg

a.
mc039-2.jpg
c.
mc039-4.jpg
b.
mc039-3.jpg
d.
mc039-5.jpg
 

 40. 


mc040-1.jpg

Which of these completes this reaction?
a.
Oxygen
c.
Metal oxide
b.
Hydrogen
d.
Air
 

 41. 

Which of these elements is the most chemically active?
a.
F
c.
Br
b.
Cl
d.
I
 

 42. 


mc042-1.jpg
a.
mc042-2.jpg
c.
mc042-4.jpg
b.
mc042-3.jpg
d.
mc042-5.jpg
 

 43. 

If the pressure exerted on a confined gas is doubled, then the volume of the gas —
a.
increases four times
c.
is doubled
b.
decreases by one-fourth
d.
is halved
 

 44. 

If the temperature of a reaction is increased, the reaction proceeds at a much quicker rate because the —
a.
activation energy increases
c.
frequency of collisions between reactants increases
b.
energy of the products increases
d.
energy of the activated complex
increases
 

 45. 


mc045-1.jpg
a.
A catalyst
c.
An acid
b.
A base
d.
An organic compound
 

 46. 

Which compound contains both ionic and covalent bonds?
a.
mc046-1.jpg
c.
mc046-3.jpg
b.
mc046-2.jpg
d.
mc046-4.jpg
 

 47. 


mc047-1.jpg
a.
1.0 L
c.
22.4 L
b.
11.2 L
d.
44.8 L
 

 48. 


mc048-1.jpg

Using the chart above, which of these combinations will probably form a precipitate?
a.
Ammonium chloride
c.
Calcium chromate
b.
Barium bromide
d.
Copper (II) carbonate
 

 49. 


mc049-1.jpg
a.
93.33 kPa
c.
98.66 kPa
b.
96.00 kPa
d.
101.33 kPa
 

 50. 


mc050-1.jpg
a.
1
c.
10
b.
7
d.
14
 



 
Check Your Work     Start Over