Sabtu, 01 Agustus 2009

HYDROCARBON QUIZ

1. You encounter many organic compounds everyday. Some organic compounds are ethanol (grain alcohol) and acetone (nail polish remover). Another organic compound which can be found in the daily life is ….
a. Salt b. water c. sugar d. bone e. mineral
2. Hydrocarbon is one of the organic compound that mainly contains ….
a. Carbon d. hydrogen
b. Oxygen e. carbon and hydrogen
c. carbon and oxygen
3. Which one of the following compounds is not classified as hydrocarbons?
a. CH3CH2CH2CH3 d. CH3CH2OH
b. C10H22 e.C6H6
c. C2H2
4. Hydrocarbons are classified into two main types, aliphatic and aromatic. The following substances which can not be classified as an aliphatic hydrocarbon is ….
a. alkane are all hydrocarbons that do not contain ….
a. benzene rings d. branched chains
b. cyclic chains e. closed chains
c. opened chains
5. One example of organic compounds that have a long chain is ....
a. petroleum
b. methane
c. glucose
d.sucrose
e. alcohol
6. Closed chains of carbon atoms can be explained as ….
a. a chain which only has carbon atoms
b. a cyclic bond among carbon atoms
c. a bond among carbon atoms that form a branched chains
d. a cyclic chain which has a double bond
e. a special chain which contains carbon and hydrogen atoms
7. Cyclic chains of carbon atoms can be explained as follow, except ….
a. a bond among carbon atoms which form a ring
b. have different formulae with saturated hydrocarbons
c. a chain which is classified as closed chain
d. have the same formulae with opened chains
e. a branch-closed chain is also a cyclic chain
8. Branched chain can be ….
(1) alkane
(2) alkene
(3) alkadiene
(4) alkyne
(1) and (2)
(2) and (3)
(3) and (4)
(1), (2), and (3)
(1), (2), (3), and (4)
9. The special features of carbon below are correct, except ….
a. has tetravalence
b. forms covalence of four
c. can bond one of another
d. the atomic number is 6
e. makes possible branched chains
10. Other kinds of atoms, such as oxygen, nitrogen, and sulfur, may be attached to the carbon atoms by ….
a. single or multiple covalent bond
b. single covalent bonds
c. double covalent bonds
d. triple covalent bonds
e. multiple covalent bonds
11. The simplest organic compounds are hydrocarbons, compounds containing only carbon and hydrogen. The wrong hydrocarbon compounds is ….
a. alcohol
b. benzene
c. butane
d. gasoline
e. cyclopropane
12. A hydrocarbon in which all carbon atoms are bonded to the maximum number of hydrogen atoms is classified as … hydrocarbon
a. saturated
b. aromatic
c. alkene
d. alkyne
e. cyclic
13. The saturated hydrocarbon can be classified as ….
a. alkene
b. alkane
c. alkyne
d. alkane and alkene
e. alkene and alkyne
14. Unsaturated hydrocarbons are ….
a. alkane and alkene
b. alkane and alkyne
c. alkene and alkyne
d. alkane, alkene, and alkyne
15. A hydrocarbon that has no carbon-carbon double or triple bonds ….
a. is saturated
b. is unsaturated
c. is not branched
d. must be straight-chain
16. Which hydrocarbon contains six carbon atoms?
a. heptane
b. 2,2-dimethylbutane
c. 2-methylhexane
d. cyclopentane
17. Methane is one of the saturated hydrocarbons, because it
a. has a tetrahedral structure
b. has 4 single covalent bond
c. is bonded only to the hydrogen atoms
d. is bonded to the maximum number of hydrogen atoms
e. can bond to the maximum number of other carbon atoms
18.Methane is one of the saturated hydrocarbons, because it
a. has a tetrahedral structure
b. has 4 single covalent bond
c. is bonded only to the hydrogen atoms
d. is bonded to the maximum number of hydrogen atoms
e. can bond to the maximum number of other carbon atoms
19. The statements below are correct about carbon atom, except ….
a. group IVA in the periodic table
b. can forms single covalent bonds
c. its compounds are molecules
d. is contained in the diamond
e. has 6 electrons’ valence
20. Methane is the simplest hydrocarbon. The wrong statement about methane is ….
a. consists of one carbon atom
b. there are 8 electron’s pairs
c. four hydrogen atoms are bonded
d. has four C—H bonds
e. forms a tetrahedral structure
21. The total number of valence electrons involved in the electron dot (or Lewis) formula of methane is:
a. 4
b. 6
c. 8
d. 10
e. 12
22. The examples of saturated hydrocarbon compounds are ….
a. C2H2, C8H14
b. C5H12, C7H16
c. C5H8, C6H14
d. C3H6, C6H12
e. CH4, C4H8
23. Aromatic hydrocarbons are hydrocarbons that contain benzene rings. Benzene consists of a ring of six carbon atoms with alternating single and double carbon–carbon bonds. The molecular formula of benzene is ….
a. CH
b. C2H2
c. C3H3
d. C6H6
e. C12H12
24. To know how the atoms are bonded to one another in the hydrocarbon compounds is by looking at ….
a. molecular formula
b. structural formula
c. general formula
d. condenced formula
e. specific formula
25. A structural formula does not convey information about the three-dimensional arrangement of atoms, because this formula only shows ….
a. the kind of elements
b. the type of atoms
c. molecular formula
d. condenced formula
e. general formula
26. To look at the three-dimensional arrangement of atoms in the hydrocar-bon compounds, you would draw a three dimensional formula by ….
a. make a diagram
b. make a picture
c. make a three-dimensional picture
d. construct a model of the atoms
e. construct a model of the molecule
27. Which of the following is both the correct bond angle and molecular geometry around a carbon atom with four single bonds?
a. 120°, tetrahedral
b. 120°, planar
c. 109.5°, tetrahedral
d. 109.5°, planar
e. 104.5°, tetrahedral
28. When two carbon atoms are bonded to one another, the possible number of hydrogen atoms that form an alkane are ….
a. 2
b. 4
c. 6
d. 8
e. 10
29. The general molecular formula of alkanes is ….
a. CnHn
b. CnH2n
c. CnH3n
d. CnH2n+2
e. –CnH2n+1–
30. The general formula of alkyl is ….
a. –CH
b. –CH2
c. –CH3
d. –CnH2n
e. –CnH2n+1
31. What is the common name for the following alkyl group? - CH(CH3)2
a. Isobutyl
b. Isopropyl
c. tert-butyl
d. sec-butyl
32. A homologous series of alkanes is a series of alkane compounds in which
one compound differs from a preceding one by ….
a. –CH–
b. -CH2–
c. –CH3
d. –CnH2n–
e. –CnH2n+1–
33. Members of a homologous series have similar … properties.
a. chemical
b. physical
c. general
d. natural
e. special
34. Structures of organic compounds are often given by condensed structural formula, where condensed formula of the fourth alkane is ….
a. (CH)4
b. (CH2)4
c. CH3CHCHCH3
d. (CH3)2CHCH
e. CH3(CH2)2CH3
35. The number of C atoms primer, secunder, tertier of CH3(CH2)2CH(CH3)CH2C(CH3)3 are ….
a. 5, 1,1, 1
b. 4, 2, 1, 1
c. 5, 2, 1, 1
d. 4, 2, 2, 1
e. 4, 1, 2, 1
36. The number of hydrogens in n-nonane is
a. 6
b. 9
c. 16
d. 18
e. 20
37. Which compound is likely to have the highest boiling point?
a. n-butane
b. n-hexane
c. decane
d. C13H18
e. C8H18
38. The empirical formula of ethane is …
a. CH
b. CH2
c. CH3
d. CH4
e. C2H6
39. When organic compounds without multiple bonds are named, the carbons are numbered so that the substituents have the … possible numbers.
(1) highest
(2) lowest
(3) same
a. (1)
b. (2)
c. (3)
d. (1) and (2)
e. (1) and (3)
40. The compound 2,4-dimethylpentane has the molecular formula ….
a. C5H12
b. C8H18
c. C6H14
d. C9H18
e. C7H16
41. What is the molecular formula for a straight chain alkane having 22 carbons?
a. C22H40
b. C22H46
c. C22H42
d. C22H48
e. C22H44
42. Which one of the following hydrocarbons is a gas at room temperature and pressure?
a. Propane
b. Hexane
c. Octane
d. Nonane
e. Decane
43. Cycloalkanes are saturated hydrocarbons in which the carbon atoms form a ring; the general formula is ….
a. CnHn-2­
b. CnHn
c. CnH2n-2
d. CnH2n
e. CnH2n+2
44. When naming hydrocarbons, we look first for the … chain of carbon atoms that contains multiple bonds.
a. shortest continuous
b. longest continuous
c. shortest branch
d. longest branch
45. The compound 2,4-dimethylpentane has the molecular formula …
a. C5H12
b. C7H16
c. C6H14
d. C8H18
e. C6H12
46. CH3CH2CH3 represents the … for propane.
a. geometric isomer
b. structural isomer
c. molecular formula
d. empirical formula
e. condensed structural formula
47. What is the IUPAC name of the molecule whose carbon skeleton is shown below?
C - C - C - C - C - C - C - C - C
a. n-hexane
b. n–heptane
c. n–decane
d. n-nonane
e. n-octane
48. CH3CH2CH2CH2CH3 is named ….
a. pentane
b. hexane
c. propane
d. butane
e. heptane
49.The condensed structural formula of 4-ethyl-3-methylheptane is ….
a. CH3CH2CH(CH3)CH(C2H5)(CH2)2CH3
b. CH3CH2CH(CH3)CH(C2H5)(CH2)2CH3V
c. CH3CH2CH(CH3)CH(C2H5 )(CH2)2CH3
d. CH3CH2CH(CH3)CH(C2H5)(CH2)2CH3
e. CH3CH2CH(CH3)CH(C2H5)(CH2)2CH3
50. The best name for :
CH3CH(CH3) CH(CH2CH3)CH2CH2CH3 is ….
a. 1,1-dimethyl-2-ethylpentane.
b. 2-methyl-3-ethylhexane.
c. 4-ethyl-5-methylhexane.
d. 2-methyl-3-propylpentane.
e. 4-ethyl-5-methylhexane.
51. The IUPAC name of CH3CH2C(CH3)2(CH2)4CH3 is ….
a. 3-methyloctane
b. 3-dimethyloctane
c. 3,3-dimethyloctane
d. 3-dimethylheptane
e. 3,4-dimethyloctane
52. The unique aspect of a saturated hydrocarbon is that it must contain ….
a. only single bonds
b. single and double bonds
c. double and triple bonds
d. only carbon and hydrogen
e. single, double and triple bonds
53. The chemical formula of 2-methyl pentane is ….
a. C5H6
b. C4H8
c. C5H10
d. C6H12
e. C6H14
54. This compound is named ….
a. 3-methylpentane
b. 4-methylpentane
c. 2-methylpentane
d. methylpentane
e. dimethylbutane
55. The name of CH3CH2CHClCH3 is ….
a. chlorobutane d. 1-chlorobutane
b. 2-chlorobutane e. 3-chlorobutane
c. chloro-2-butane
56. What is the simplest cyclic alkane?
a. cycloethane d. cyclopropane
b. cyclobutane e. cyclopentane
c. cyclohexane
57. When 6 carbon atoms form a ring chain and have a single covalent bond, the possible number of hydrogen atoms are ….
a. 6 d. 12
b. 8 e. 14
c.10
58. The chemical formula of cyclohexane is ….
a. C6H6 d. C6H12
b. C6H8 e. C6H14
c. C6H10
59. The empirical formula of cyclohexane is ....
a. CH d. CH2
b. C2H e. CH3
c. C2H5
60. The name of this compound is ….
a. methylhexane
b. methylbenzene
c. hexylmethane
d. 1-methylcyclohexane
e. Methylcyclohexane
61. This compound is named ….
a. cyclohextyldimethane
b. methylcyclohexane
c. 1,3-methylcyclohexane
d. 1,3-dimethylcyclohexane
e. 1,3-dimethylbenzene
62. The above compound is named ….
a. 1,4-dichlorocyclohexane
b. 2,5-dichlorocyclohexane
c. p-dichlorobenzene
d. dichlorocyclohexane
e. 1,4-dichlorobenzene
63. How many primary carbons are in the following hydrocarbon?
a. 3 d. 8
b. 4 e. 15
c. 5
64. In the condensed structural formulas of cycloalkanes, a carbon atom and its attached hydrogen atoms are assumed to be at each ….
a. side d. chain
b. corner e. ring
c. branch
65. Benzene has the molecular formula … and the empirical formula ….
a. C6H6 and CH
b. C6H12 and CH2
c. C6H14 and C3H7
d. C6H10 and C3H5
e. C6H8 and C3H4

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