GOOD SAMARITAN COLLEGES
Cabanatuan City
College of Allied Health Professions
Name: ___________________________________ Instructor: ________________________________
Course/Year: _____________________________ Permit No: ________________________________
Preliminary Examination
Chem 3 – Organic Chemistry
DIRECTION: Choose the letter of your answer from the choices given. Shade the letter corresponding to your answer on
the provided answer sheet.
1. Theory that says “the intervension of vital force is necessary for the synthesis of organic compounds.”
a. Structural theory
b. Vitalism
c. Fundamental Theory
d. Resonance Theory
2. Based on Structural theory, Oxygen is
a. monovalent
c. trivalent
b. divalent
d. tetravalent
3. Structure representation where a molecule is represented by two or more Lewis structure that differ only in the position
of electrons.
a. Resonance
b. Structural Isomers
c. Enantiomer
d. Functional Group
4. Compounds that have the same molecular formula but differ in their connectivity.
a. Resonance
b. Structural Isomers
c. Enantiomer
d. Functional Group
5. Structural representation that shows only carbon skeleton.
a. Dash Formula
b. Dot Formula
c. Condensed Formula
d. Bond Line Formula
6. An geometric isomer of cis-2-butene
a. cis-1-butene
c. cyclobutene
b. trans-2-butene
d. 2-methyl propene
7. Functional group common to carboxylic acid and ester.
a. carbonyl
b. carboxyl
c. hydroxyl
d. oxygen
For #8-11, consider the hydrocarbon 2,2-dimethylbutane
8. How many tertiary Hydrogen is present
a. 0
b. 1
c. 2
d. 3
9. How many tertiary Carbon is present
a. 0
b. 1
c. 2
d. 3
10. How many Secondary Hydrogen is present
a. 0
b. 1
c. 2
d. 3
11. How many secondary Carbon is present
a. 0
b. 1
c. 2
d. 3
12.
2- methyl-2-propanol is a
a. primary alcohol
b. secondary alcohol
c. tertiary alcohol
d. NOTA
13. Which of the following compounds has the highest boiling point.
a. Propanol
b. Butanol
c. Pentanol
d. Hexanol
14. Hydrocarbon family with the general formula CnH2n+2 with no rings
a. Alkanes
b. Alkenes
c. Alkynes
d. Alcohol
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15. A carboxylic acid derivative with an N atom replacing the hydroxyl group.
a. amine
b. amide
c. ester
d. ether
16. The IUPAC name of CH3CH2CH(CH3)CH(CH2CH2CH3)CH(CH3)CH(CH3)CH3
a. 2,3,5-trimethyl-4-propyl-heptane b. 4-sec-butyl-2,3-dimethylheptane
c. 4-tert-butyl-2,3-dimethylheptane d. 4-butyl-2,3-dimethylheptane
17. Which of the following hydrocarbons is most soluble in water?
a. methanol
b. propanol
c. butanol
d. decane
18. Which is not an isomer of C3H6
a. propene
c. cyclopropane
b. 2-propene
d. NOTA
19. The correct name of 2-tert-butylpentane
a. 2-tert-butylpentane
c. 2-butylpentane
b. 2,2,3-trimethylhexane
d. 4,5,5-trimethyl hexane
20. The correct name of 2-ethyl-3-methyl-5-isoprpylhexane
a. 4,5-dimethyl-2-heptanol
b. 3,4-dimethyl-6-heptanol
c. 2,3,5,6-tetramethyloctane
d. 2-ethyl-3-methyl-5-isoprpylhexane
21. The IUPAC name of the following compound is
H3C
H3C
CH3
CH3
a. bicyclo[5.5.0]dodecane
b. 3,8-dimethylbicyclo[4.4.0]decane
c. 4,5-diethyloctane
d. 2,3-dipropyl hexane
22. Molecule with the formula of C5H12 that only has primary hydrogen atoms.
a. neopentane
b. 2-methylbutane
b. cyclopentane
d. NOTA
23. Which of the following compounds will not exhibit resonance structure?
a. CO2
b. SO3
c. SO4
d. NO3
For items # 24-31, identify whether the following pairs are
a. the same compound
b. Structural isomers
c. Stereoisomers
d. totally different compound
24.
25.
26.
27.
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28.
29
30.
31.
32. Which of the following compounds cannot exhibit cis-trans isomerism
a. CH2= CHCH2CH3
b. CH3CH2CH = CHCl
b. CH3 CH= CHCH3
d. NOTA
For items # 33-37, identify the functional group present as
a. Primary
b. Secondary
c. Tertiary
d. Quaternary
33.
35.
OH
CH3
34.
OH
36.
NHCH3
NH2
37. CH3CH2NHCH2CH3
For items # 38-42, decide which member of each of the following pairs has the higher boiling point?
38.
39.
40.
41.
42.
a. ethane
c. hexane
a. propane
c. gasoline
a. pentane
b.
d.
b.
d.
b.
chloroethane
pentane
propanamine
Ethanol
neopentane
Identify the IUPAC name of the following molecular structure.
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a. cis – 2,4 - Dimethylpentane
b. trans – 2,4 - Dimethylpentane
c. 2,4 - Dimethylpentane
d. 1,1,3,3 - tetramethylpropane
Identify the correct molecular structure of the following molecular formula.
44.
a.
Neopentyl chloride
b.
c.
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45. sp2 hybridization will yield
a. 1 π bond and 3 σ bond
c. 3 π bond and 1 σ bond
b. 2 π bond and 2 σ bond
d. 4 σ bond
46. sp hybridization will yield
a. 1 π bond and 3 σ bond
c. 3 π bond and 1 σ bond
b. 2 π bond and 2 σ bond
d. 4 σ bond
47. Which of the following DONT EXPERIENCE a restricted rotation ?
a. alkane
b. alkene
c. alkyne
d. alkenol
48. The geometric shape of methane is
a. tetrahedral
c. bent
b. trigonal planar
d. linear
49. The geometric shape of water is
a. tetrahedral
c. bent
b. trigonal planar
d. Linear
50. Which of the following bond is most polar ?
a. C – C
b. C – H
c. C – O
d. C – F
51. What is the force of attraction caused by permanent dipole moment of a molecule ?
a. Ion-ion forces
b. Dipole – dipole forces
c. H- bond
d. Van der Waals
52. What is the force of attraction caused by temporary dipole moment of a molecule ?
a. Ion-ion forces
b. Dipole – dipole forces
c. H- bond
d. Van der Waals
53. Which of the following compounds CANNOT exhibit geometric isomerism ?
a. alkenes
b. cycloalkanes
c. cycloalkenes
d. Alkynes
54. What is the only alcohol used in beverages ?
a. ethyl alcohol
c. methanol
b. methyl alcohol
d. isopropyl alcohol
55. What is the simplest hydrocarbon ?
a. methane
c. formaldehyde
b. ethane
d. methanol
56. As suggested by its name, an infrared spectrometer uses infrared electromagnetic radiation in its machine. This infrared
radiation will result in which molecular activity?
a. molecular rotation
b. molecular vibration
c. molecular movement
d. molecular ionization
57. Which of the following is 4-methylpentan-1-ol?
a.
b.
c.
d.
58. Which is 3,3-dimethylbutan-2-ol?
a.
b.
c.
d.
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59.
a.
b.
c.
d.
Diethyltrimethyldipropyldecane
2-methyl-2-propyl-3-ethyl-3-propyl-4-propyl-5-ethyl-5propylhexane
3,5-diethyl-2-methyl-2,3,4,5-tetrapropylhexane
4,6-diethyl-4,7,7-trimethyl-5,6-dipropyldecane
II. Identify the functional groups that produces peak at the identified wavelength.
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Prepared by:
Prof. Richard M. Valencia
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