Download Practice Test for Unit 5

PRACTICE TEST: NOMENCLATURE AND REACTIONS
Multiple Choice
Identify the choice that best completes the statement or answers the question.
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1. How many atoms of Oxygen are present in a molecule of
2Mg3(PO4)2
a. 4
c. 6
b. 8
d. 16
2. What is the formula for zinc fluoride?
a. ZnF
c. Zn2F
b. ZnF2
d. Zn2F3
3. What is the formula for the compound formed by lead(II) ions and chromate ions?
a. PbCrO4
c. Pb2(CrO4)3
b. Pb2CrO4
d. Pb(CrO4)2
4. Name the compound CF4.
a. calcium fluoride
c. carbon tetrafluoride
b. carbon fluoride
d. monocalcium quadrafluoride
5. Name the compound N2O3.
a. dinitrogen oxide
c. nitric oxide
b. nitrogen trioxide
d. dinitrogen trioxide
6. What is the formula for diphosphorus pentoxide?
a. P2PeO5
c. P2O4
b. PO5
d. P2O5
7. What is the oxidation number of oxygen in most compounds?
a. –8
c. 0
b. –2
d. +1
8. According to the law of conservation of mass, the total mass of the reacting substances is
a. always more than the total mass of the products.
b. always less than the total mass of the products.
c. sometimes more and sometimes less than the total mass of the products.
d. always equal to the total mass of the products.
9. In the word equation, sodium oxide + water  sodium hydroxide, the formula for
sodium hydroxide is represented by
a. Na2OH.
c. NaO2.
b. NaOH.
d. Na2O.
10. In the chemical equation 2Mg(s) + O2(g) ? 2MgO(s),
a. Mg represents the product magnesium.
c. Mg represents the reagent magnesium.
b. the reaction yields magnesium.
d. O2 represents the product oxygen gas.
11. Which coefficients correctly balance the formula equation CaO + H2O  Ca(OH)2?
a. 2, 1, 2
c. 1, 2, 1
b. 1, 2, 3
d. 1, 1, 1
12. The equation AX  A + X is the general equation for a
a. synthesis reaction.
c. combustion reaction.
b. decomposition reaction.
d. single-displacement reaction.
13. The equation AX + BY  AY + BX is the general equation for a
a. synthesis reaction.
c. single-displacement reaction.
b. decomposition reaction.
d. double-displacement reaction.
____ 14. The equation A + X  AX is the general equation for a(n)
a. combustion reaction.
c. synthesis reaction.
b. ionic reaction.
d. double-displacement reaction.
____ 15. In what kind of reaction does a single compound produce two or more simpler substances?
a. decomposition reaction
c. single-displacement reaction
b. synthesis reaction
d. ionic reaction
____ 16. When potassium reacts with water, one product formed is
a. hydrogen gas.
c. potassium dioxide.
b. oxygen gas.
d. salt.
____ 17. What is the balanced equation when aluminum reacts with copper(II) sulfate?
a. Al + Cu2S  Al2S + Cu
b. 2Al + 3CuSO4  Al2(SO4)3 + 3Cu
c. Al + CuSO4  AlSO4 + Cu
d. 2Al + Cu2SO4  Al2SO4 + 2Cu
____ 18. Magnesium bromide (aq) + chlorine (g) yields
a. Mg(s) and BrCl(aq).
c. MgBrCl(aq).
b. MgCl(aq) and Br2(l).
d. MgCl2(aq) and Br2(l).
____ 19. Which type of chemical reaction is shown?
a. double replacement
c. synthesis
b. combustion
d. decomposition
____ 20. Use the activity series shown to predict which reaction will occur.
Activity Series for Halogens
Fluorine
Most Active
Chlorine
Bromine
Iodine
Least Active
a.
b.
c.
d.
____ 21. What are the correct coefficients when this equation is balanced? K + Br 2  KBr
a. 1, 1, 1
c. 2, 1, 2
b. 1, 2, 1
d. 2, 1, 1
____ 22. Which of the following statements about a catalyst is true?
a. A catalyst can initiate a reaction.
b. A catalyst can accelerate a reaction.
c. A catalyst can be consumed during a reaction.
d. A catalyst can be changed during a reaction.
____ 23. Which of the following factors does NOT affect the rate of the reaction?
a. the amount of the reactants
c. the size of the container used
b. the physical state of the reactants
d. temperature
____ 24. A collision requires _____ to be effective.
a. only enough energy
b. favorable orientation
c. enough energy and favorable orientation
d. a reaction mechanism
____ 25. If a collision between molecules is very gentle, the molecules are
a. more likely to be oriented favorably.
b. less likely to be oriented favorably.
c. likely to react.
d. likely to rebound without reacting.
Short Answer
26. Two molecules collide but bounce apart unchanged. What two reasons could account for their failure to react?
27. Explain whether a crushed solid or a solid cube would react more quickly with a gas. Hint: Both samples have
the same mass.
Problem
28. Write a balanced chemical equation for the following reaction: iron plus copper(I) nitrate yields iron(II)
nitrate plus copper.
29. Write a balanced chemical equation for the synthesis of liquid phosphorus trichloride, PCl3, from white
phosphorus, P4, and chlorine gas.
30. Tell what type of chemical reaction is represented by the following formula equation. Then balance the
equation.
C3H8(g) + O2(g)
CO2(g) + H2O(l)
31. Tell what type of chemical reaction is represented by the following formula equation. Then balance the
equation.
Ga(s) + S(s)
Ga2S3(s)
32. Tell what type of chemical reaction is represented by the following formula equation. Then balance the
equation.
KBr(aq) + Mg(OH)2(aq)
KOH(aq) + MgBr2(aq)
Completion
Complete each statement.
33. If the temperature at which a reaction occurs increases, the number of collisions ____________________.
PRACTICE TEST: NOMENCLATURE AND REACTIONS
Answer Section
MULTIPLE CHOICE
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SHORT ANSWER
26. Not enough energy
Unfavorable orientation
27. The crushed solid would react more quickly due to increased surface area.
PROBLEM
28. Fe(s) + 2CuNO3(aq)  Fe(NO3)2(aq) + 2Cu(s)
29. P4(s) + 6Cl2(g)  4PCl3(l)
30. combustion, C3H8(g) + 5O2(g)
3CO2(g) + 4H2O(l)
31. synthesis, 2Ga(s) + 3S(s)
Ga2S3(s)
32. double-displacement, 2KBr(aq) + Mg(OH)2(aq)
2KOH(aq) + MgBr2(aq)
COMPLETION
33. increases