Pre-AP Chemistry Practice Test - Unit 4: Chemical ...
Pre-AP Chemistry Practice Test - Unit 4: Chemical Transformations
Question 1
Precipitation is an example of what type of reaction?
A. Single replacement
B. Metathesis (double-displacement)
C. Decomposition
D. Composition
Question 2
The precipitate in a precipitation reaction is the
A. A reactant that does not react
B. Insoluble salt that falls out of solution
C. The product that is still aqueous (aq)
D. None of the above
Question 3
When solutions of two ionic compounds are combined and a solid forms, the process is
called __________.
A. Hydration
B. Solvation
C. Dissociation
D. Precipitation
Question 4
Identify the precipitate in the equation: 2AgNO 3(aq) + Na2S(aq) --> Ag2S(s) +
2NaNO3(aq)
A. AgNO3
B. Na2S
C. Ag2S
D. NaNO3
Question 5
Which is a net ionic equation for the precipitation reaction between BaCl 2 and Na2SO4?
A. Ba2+(aq) + 2Cl-(aq) + 2 Na+(aq) + SO42-(aq) --> BaSO4(s) + 2Cl-(aq) + 2Na+(aq)
B. BaCl2(aq) + Na2SO4(aq) --> BaSO4(s) + 2NaCl(aq)
C. Na+(aq) + Cl-(aq) --> NaCl(s)
D. Ba2+(aq) + SO42-(aq) --> BaSO4(s)
Question 6
Oxidation involves
A.
B.
C.
D.
Losing electrons; gaining oxygen
Gaining electrons; gaining oxygen
Losing electrons; losing oxygen
Gaining electrons; losing oxygen
Question 7
Reduction involves
A. Gaining electrons; gaining oxygen
B. Losing electrons; losing oxygen
C. Gaining electrons, losing oxygen
D. Losing electrons; gaining oxygen
Question 8
In the reaction 2Ca(s) + O2(g) --> 2CaO(s), calcium is __________
A. Reduced
B. Oxidized
C. Synthesized
D. None of the above
Question 9
The loss of electrons or increase in the oxygen:hydrogen ratio is known as
A. Dehydration
B. Hydrogenation
C. Reduction
D. Oxidation
Question 10
Which substance is reduced in the following reaction?
NaOH + Li --> LiOH + Na
A. Li
B. O
C. H
D. Na
Question 11
If nitric acid is derived from the nitrate ion, what is the formula for nitric acid?
A. HNO3
B. H3NO3
C. HNO2
D. H2NO2
Question 12
What is the name of the acid that has the formula H2CO3?
A.
B.
C.
D.
Hydrocarbonic acid
Hydrocarbonate acid
Carbonic acid
Carbonate acid
Question 13
An Arrhenius acid must contain _____ and dissociate in aqueous solutions to produce
_____.
A. Hydrogen; hydrogen ions
B. Hydroxide; hydrogen ions
C. Hydrogen; hydroxide ions
D. Hydroxide; hydroxide ions
Question 14
By definition, a Bronsted-Lowry base is defined as:
A. A proton donor
B. A proton acceptor
C. Increases [H+]
D. Increases [OH-]
Question 15
Which of the following CANNOT act as a Bronsted acid?
A. CH4
B. H2O
C. NH3
D. Cl2
Question 16
What is the symbol for heat?
A. q
B. H
C. J
D. ¡ãC
Question 17
A process that releases heat to its surroundings
A. Endothermic
B. Radiation
C. Exothermic
D. Heat transfer
Question 18
Heat transfer through direct contact
A.
B.
C.
D.
Convection
Radiation
Conduction
Thermal
Question 19
-124 joules of heat are added to a piece of lead (C = 0.128 J/g oC). It is heated to
100.0oC, and then lowered into a calorimeter filled with water. The lead¡¯s temperature
decreases to 28.8oC. What is the mass?
A. 150 g
B. 13.6 g
C. 4 g
D. 1130 g
Answer Key
1. B
2. B
3. D
4. C
5. A
6. A
7. C
8. B
9. D
10. D
11. A
12. C
13. A
14. B
15. D
16. A
17. C
18. C
19. B
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