Chemistry Test: Naming Compounds and Balancing Equations



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[pic]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[pic]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. |[pic] |B. |[pic] |C. |[pic] |D. |[pic] |

10. The correct condensed structure of a compound having the IUPAC name 6-ethyl-6,7-dimethyl-2,4-dioctyne is ____.

|A. |[pic] |

|B. |[pic] |

|C. |[pic] |

|D. |[pic] |

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. |[pic] |C. |[pic] |

|B. |[pic] |D. |[pic] |

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. |[pic] |C. |[pic] |

|B. |[pic] |D. |[pic] |

21. Name the cycloalkane given below.

[pic]

|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 [pic] is ____.

|A. |3,4-dimethylpentane |C. |2,3-dimethylpentane |

|B. |2,3-dimethylbutane |D. |2,2,3-dimethylbutane |

26. 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 |

27. What is the general formula for ethers?

|A. |R–O–R' |B. |R–COOH |C. |R–COO–R' |D. |R–CHO |

28. 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. |

29. Which of the following suffixes is used in naming alcohols?

|A. |-al |B. |-oic |C. |-ol |D. |-ane |

30. In an equation, the symbol for a substance in water solution is followed by

|A. |(1). |B. |(g). |C. |(aq). |D. |(s). |

31. 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 |

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