Chemistry Test: Naming Compounds and Balancing Equations
Multiple Choice
1. What is the molecular formula of benzene?
A. C6H6
B. C6H12
C. C6H14
D. C12H12
2. The reaction represented by the equation 2KClO3(s)  2KCl(s) + 3O2(g) is a(n)
A. synthesis reaction.
C. combustion reaction.
B. decomposition reaction.
D. ionic reaction.
3. The reaction represented by the equation 2Mg(s) + O2(g)  2MgO(s) is a
A. synthesis reaction.
C. single-displacement reaction.
B. decomposition reaction.
D. double-displacement reaction.
Choose the letter of the correct name for each structure.
4. CH3CH2C CCH3
A. 4-pentyne
B. 3-pentane
C. 2-pentyne
5. CH3CH2CH2CH2CH3
A. propane
B. pentane
C. hexane
6. CH3CH2CH=CHCH2CH2CH=CH2
A. 1,5-octadiene
B. 3,7-octadiene
C. 4,8-dioctene
7. CH3CH=CHCH2CH3
A. 2-pentene
B. 3-pentene
C. 4-pentene
8. CH3CH2C CCH2CH3
A. 3-hexene
B. 3-hexyne
C. 3-pentyne
9. Which of the following is the best way to represent the structure of benzene?
A.
B.
C.
D.
10. The correct condensed structure of a compound having the IUPAC name 6-ethyl-6,7-dimethyl-2,4dioctyne is ____.
A.
B.
C.
D.
11. Sulfur dioxide, oxygen, and water combine to produce sulfuric acid (2 SO2 + O2 + 2 H2O  2 H2SO4).
This chemical reaction is
A. an example of combustion.
B. a synthesis reaction.
C. a replacement reaction.
D. a decomposition reaction.
12. Which of the following groups is characteristic of an alcohol?
A. -CO
B. -COOH
C. -NH2
D. -OH
13. Which equation is not balanced?
A. 2H2 + O2  2H2O
B. 4H2 + 2O2  4H2O
C. H2 + H2 + O2  H2O + H2O
D. 2H2 + O2  H2O
14. The reaction represented by the equation Mg(s) + 2HCl(aq)  H2(g) + MgCl2(aq) is a
A. composition reaction.
C. single-displacement reaction.
B. decomposition reaction.
D. double-displacement reaction.
15. When the equation Fe3O4 + Al  Al2O3 + Fe is correctly balanced, what is the coefficient of Fe?
A. 3
B. 4
C. 6
D. 9
16. Which coefficients correctly balance the formula equation
NH4NO2(s) N2(g) + H2O(l)?
A. 1, 2, 2
B. 1, 1, 2
C. 2, 1, 1
D. 2, 2, 2
17. Which group of organic compounds can be considered derivatives of ammonia, NH3?
A. ester
B. ketone
C. aldehyde
D. amine
18. The structure of 3-ethyl-5,7-dimethyl-5-propylnonane is ____.
A.
C.
B.
D.
19. Which of the following is a balanced chemical equation?
A. H2O2  H2O + O2
B. 2 Fe2O3 + 3 C  4 Fe + 3 CO2
C. SO2 + O2 + 2 H2O  4 H2SO4
D. 2 Mg + HCl  MgCl2 + H2
20. The correct structural formula of 1,2-diethyl-2,3-dimethyl-6-propylcyclooctane is ____.
A.
C.
B.
D.
21. Name the cycloalkane given below.
A. 1,2,4-trimethylcyclohexane
C. 1,2,4-trimethylcyclopentane
B. 1,2,4-dimethylcyclopentane
D. 1,3,5-trimethylcyclopentane
22. The reaction represented by the equation Pb(NO3)2(aq) + 2KI(aq)  PbI2(s) + 2KNO3(aq) is a
A. double-displacement reaction.
C. decomposition reaction.
B. synthesis reaction.
D. combustion reaction.
23. The reaction represented by the equation 2HgO(s)  2Hg(l) + O2(g) is a(n)
A. single-displacement reaction.
C. combustion reaction.
B. synthesis reaction.
D. decomposition reaction.
24. Which coefficients correctly balance the formula equation CaO + H2O  Ca(OH)2?
A. 2, 1, 2
B. 1, 2, 3
C. 1, 2, 1
D. 1, 1, 1
25. The correct IUPAC name of the compound
is ____.
A. 3,4-dimethylpentane
C. 2,3-dimethylpentane
26.
27.
28.
29.
30.
31.
B. 2,3-dimethylbutane
D. 2,2,3-dimethylbutane
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
What is the general formula for ethers?
A. R–O–R'
B. R–COOH
C. R–COO–R'
D. R–CHO
The reaction represented by the equation Cl2(g) + 2KBr(aq)  2KCl(aq) + Br2(l) is a(n)
A. synthesis reaction.
C. single-displacement reaction.
B. decomposition reaction.
D. combustion reaction.
Which of the following suffixes is used in naming alcohols?
A. -al
B. -oic
C. -ol
D. -ane
In an equation, the symbol for a substance in water solution is followed by
A. (1).
B. (g).
C. (aq).
D. (s).
Which of the following is a balanced chemical equation?
A. AgNO3 + NaCl  4AgCl + 2NaNO3
B. 2AgNO3 + 2NaCl  3AgCl + 2NaNO3
C. AgNO3 + NaCl  AgCl + NaNO3
D. AgNO3 + 2NaCl  AgCl + 3NaNO3