organic preboard questions and answers.

1. ORGANIC CHEMISTRY AND SAFETY
1. Benzene owes its unusualstability to
a. pi electron delocalization over and above the six carbon ring
b. alternating single and double bonds
c. stereochemistry
d. carbon being sp2 hybridized
2. Benzene and its derivatives undergo substitution reactions instead of addition reactions because
a. the integrity of the benzene ring and the stable pi-bonding pattern remains intact
b. the hydrogens ofbenzene are relatively loosely bound
c. the benzene ring is sterically crowded hence only substitution can occur
d. the benzene ring is electron rich
3. Electrophiles are
a. electron deficient species b. electron rich species
c. electrically neutral species d. positively charged ion
4. AlCl3 is a catalyst used in the alkylation of aromatic compounds.It is a
a. a Lowry-Bronsted acid b. an Arrhenius acid c. a Lewis acid d. a Lewis base
5. The position adjacent to the substituent in a mono-substituted benzene derivative is
a. the ortho position b. the meta position c. the para position d. All
6. CH3CH2CHCH3 is a
‫׀‬
Cl
a. primary alkyl halide b. secondary alkyl halide c. tertiary alkyl d. methyl halide
7. SN2 means
a. two step nucleophilic substitution mechanism involving both alkyl halide and nucleophile
b. one step nucleophilic substitution mechanism involving both alkyl halide and nucleophile
c. two step nucleophilic substitution mechanism involving only the alkyl halide
d. one step nucleophilic substitution mechanism involving only the nucleophile
8. Which alkyl halide will most likely undergo SN1 mechanism?
a. 1-bromobutane b. 2-bromo-2-methylpropane c. bromomethane d. 2-bromobutane
9. Which alkyl halide will most likely undergo SN2 mechanism?
a. 1-bromobutane b. 2-bromo-2-methylpropane c. bromomethane d. 2-bromobutane
10. Which of the following is both the correct bond angle and molecular geometry around a carbon atom with four single bonds?
a. 1200, tetrahedral b. 1200, planar c. 109.50, tetrahedral d. 109.50, planar
11. The functional group for organic acids is the
a. hydroxyl group b. amine group c. carbonyl group d. carboxyl group
12. The general formula for an ester is
a. ROR’ b. RCOOH c. RCOR’ d. RCOOR’
13. How many electrons are shared in a triple bond?
a. 1 b. 2 c. 6 d. 4
14. 14. Hydrogenation of an alkene yields
a. alkane b. alkyne c. alcohol d. aldehyde
15. Which of the following is the product from the dehydration of an alcohol?
a. alkane b. alkene c. aldehyde d. ketone
16. Which of the following contains a tertiary carbon?
a. 2,2-dimethylpropane b. 3-methylheptane c. 2-pentene d. a, b and c
17. Alkanes react primarily by
a. free radical substitution c. electrophilic addition
b. electrophilic substitution d. nucleophilic addition
18. The simplest ketone is
a. ethyl methyl ketone b. acetone c. lactone d. cyclohexanone
19. The carbonyl group of aldehydes and ketones is very reactive because
a. the ‒C=O bond is electron rich c. the ‒C=O bond is polar
b. the oxygen has two nonbonding pairs d. all of these
20. Aldehydes and ketones generally react by
a. nucleophilic addition c. electrophilic addition
b. nucleophilic substitution d. electrophilic substitution
21. What is formed when an alcohol reacts with a carboxylic acid?
a. ester b. anhydride c. acid chloride d. thioester
22. Carboxylic acids are more acidic than alcohols because
a. of the increased polarity of the O-H bond due to the carbonyl group
b. of the stability of the carboxylate anion formed upon ionization
c. of the greater value of Ka
d. all of the above
23. An example of a trihydric alcohol is
a. ethyl alcohol b. glycol c. glycerol d. isopropyl alcohol
24. Dipole–dipole interactions are present in _____.
a. HCl b. C6H6 c. CH4 d. NaCl
25. Non-polar atoms and molecules condense due to _____.
a. ion–dipole interaction c. polarizability dispersion forces
b. van der Waals forces d. dipole–dipole attraction

2. ORGANIC CHEMISTRY AND SAFETY
26.A compound having a permanent dipole moment is _____.
a. CO2 b. H2 c. CH4 d. CO
27. Which element can take part in hydrogen bonding?
a. F b. O c. N d. all of them
28. Only dispersion forces are present in _____.
a. HF b. C6H6 c. CO d. C2H5OH
29. Polarizability is highest for _____.
a. CH4 b. H2 c. CCl4 d. H2S
30. A compound which hydrogen bonds is _____.
a. BeH2 b. CH4 c. CH3COOH d. C2H6
31. The force due to hydrogen bonding must be overcome in the boiling of _____.
a. CH3OCH3 b. NH3 c. SbH3 d.C2H5OC2H5
32. The hydrocarbon having the lowest boiling point is _____.
a. C4H10 b. CH4 c. C6H6 d. C2H6
33. Which of the following has the lowest boiling point?
a. CH3COCH3 b. CH3OCH3 c. CH3COOH d.CH3CHO
34. Arrange the following according to increasing boiling point:
W= methyl acetate X= butanal Y= n-butyl alcohol Z = butanoic acid
a. XYZW b. WXYZ c. XWYZ d.WXZY
35. Which of the following has the lowest boiling point?
a. o-hydroxynitrobenzene c. p-hydroxynitrobenzene
b. m-hydroxynitrobenzene d. p-hydroxybenzoyl chloride
36. Which of the following statements is correct?
a. The greater the molecular weight, the lower the b.p
b. The greater the molecular attraction, the higher the b.p
c . The greater the molecular attraction, the lower the ∆HV
d. The smaller the molecular weight, the higher the b.p
37. The boiling point of a liquid depends on _____.
a. external pressure b. molecular attraction c. molecular weight d. all of the above
38. Arrange the following according to increasing melting point.
a. I, II, III, IV b. III, II, IV, I c. I, IV, II, III d. I, II, IV, III
39. The vapor pressure of a liquid is _____.
a. Inversely proportional to temperature b. Directly proportional to temperature
c. Directly proportional to boiling point d. Directly proportional to melting point
40. The vapor pressure of a liquid depends on the _____.
a. amount of liquid c. temperature of the liquid
b. volume of the liquid d. surface area of the liquid
41. Which of the following factors will not affect the rate of vaporization of the liquid?
a. temperature b. amount of liquid c. intermolecular forces d. surface area
42. A liquid having a higher vaporpressure will have _____.
a. higher molecular weight c. higher boiling point
b. lower boiling point d. higher surface area
43. Which of the following properties indicates very strong intermolecular forces in liquids?
a. very low surface tension c. very low boiling point
b. very low critical temperature d. very low vaporpressure
44. Rank the following compounds in the order of increasing basicity:
I.p-nitroaniline II. p-aminobenzaldehyde III. N-methylaniline IV. p-methylaniline
a. I, II, III, IV b. IV, III, II, I c. I, II, IV, III d. III, IV, I, II
45. Which would be the strongest acid? Ans.B
46. Which of the following is the strongest base? Ans.B

3. ORGANIC CHEMISTRY AND SAFETY
47. Arrange according to increasing acidity
I. methanol II. ethanol III. phenol IV. p-nitrophenol V. p-bromophenol
a. I, II, III, IV, V b. II, I, III, IV, V c. II, I, III, V, IV d. IV, V, III, I, II
48. Which of the following indicates the order of decreasing acidity of the four molecules below:
A)I> III > II > IV B)II > I > IV > III C)II >III > I > IV D)IV> II > III > I
49. Arrange the following according to increasing acid strengths:
W= benzoic acid X= 4-methoxybenzoic acid Y= 4-cyanobenzoic acid Z = 4-methylbenzoic acid
a. XZWY b. ZXWY c. ZXYW d. YWXZ
50. Arrange the following in the order of decreasing stability:
W = 1-pentene X = trans-2-pentene Y= cis-2- penteneZ = 2-methyl-2-butene
a. WXYZ b. ZYXW c. ZXYW d. WYXZ
51. Rank the following cations according to increasing stability.
I. (CH3)3C-CH2+ II. (CH3)2CH-CH2+ III. CH3CH2CH2CH2+ IV. CH3+
a. IV, II, III, I b. III, II, I, IV c. I, II, III, IV d. IV, I, II, III
52. Predict the increasing order of reactivity by the SN2 mechanism:
a. V, IV, II, I, II b. V, III, IV, 1, II c. V, III, IV, II, I d. II, I, IV, III, V
53. Order the following set of compounds according to increasing rate of SN1 reactivity:
a. IV, I, II, III b. I, IV, II, III c. IV, I, III, II d. III, II, I, IV
54. The two strands of DNA are said to be
a. oppositely charged b. complementary c. identical d. partners
55. The amino acid sequence of a polypeptide chain comprises the _____ structure of the protein.
a. primary b. secondary c. tertiary d. quarternary
56. An amino acid with a polar R group
a. Cysteine b. Phenylalanine c. Leucine d. Valine
57. An amino acid with a basic R group
a. Alanine b. Arginine c. Proline d. Glutamine
58. An amino acid that is electrically neutral at pH5
a. Aspartic acid b. Histidine c. Glycine d. Threonine
59. An amino acid that will move towards the cathode at pH10
a. Glutamic acid b. Tyrosine c. Alanine d. Valine
60. A test for the presence of benzene ring in protein
a. Biuret b. Millon’s c. Hopkin’s Cole d. Xanthoproteic
61. Protein present in bones
a. collagen b. fibroin c. elastin d. keratin
62. Protein in grains
a. lactalbumin b. myosin c. leucasin d. globulin
63. Simple protein in blood
a. edestin b. fibrinogen c. myosin d. glutenin
64. An alkaloidal reagent that is used in the treatment of burns
a. tannic acid b. picric acid c. phosphotungstic acid d. phosphomolybdic acid
65. A conjugated protein with colored pigment
a. chromoprotein b. glycoprotein c. nucleoprotein d. phosphoprotein
66. The Xanthoproteic test is a test for the presence of ...
a. Tryptophan b. Serine c. Tyrosine d. Threonine
67. A color test for protein that uses glyoxylic acid as reagent
a. Millon’s b. Xanthoproteic c. Ninhydrin d. Hopkin’s Cole
68. A dipolar ion formed when amino acid undergoes self protonation
a. anion b. cation c. Zwitter ion d. AOTA
69. DNA is the genetic material of the cells. The building block of DNA are:
a. amino acids b. monosaccharides c. disaccharides d. nucleotides
70. Enzymes are molecules that speed up chemical reactions. All enzymes are
a. carbohydrates b. nucleic acids c. proteins d. lipids
71. When proteins are broken down by enzymes, the products are:
a. amino acids b. carbohydrates c. fatty acids d. nucleic acids
72. A nucleotide contains _____.
a. sulfur b. nitrogen base c. 6-carbon sugar d. all of the above
73. The structure of DNA was described by_____.
a. Watson and Crick b. Mendel c. Redi d. Chargaff

4. ORGANIC CHEMISTRY AND SAFETY
74. Which of the following vitamins are all fat soluble.
a. ABCD b. ACDE c. ADEK d. BCDE
75. Deficiency of this vitamin will cause scurvy.
a. Vit A b. Vit B c. Vit C d. Vit D
76. Vitamin B6 is also known as,
a. Niacin b. Pyridoxin c. Thiamin d. Rivoflavin
77. A vitamin that function as an antioxidant.
a. Vit A b. Vit B c. Vit C d. Vit D
78. Phylloquinone is commonly known as,
a. Vit B3 b. Vit K c. Vit F d. Vit H
79. The percentage of A + G in DNA equals_____.
a. 25% b. 50% c. 80% d. 100%
80. The nucleotide of DNA have __________ bases.
a. purine b. pyrimidine c. either A or B d. neither A or B
81. The process of copying DNA molecule.
a. translation b. reproduction c. replication d. transcription
82. A new copy of a DNA molecule is precisely synthesized during a process called
a. translation b. transcription c. replication d. reproduction
83. Which form of RNA acts as a blueprint for polypeptide biosynthesis by the ribosome?
a. mRNA b. tRNA c. rRNA d.NOTA
84. The preparation of alkyl halide that obeys Markovnikov’s rule.
a. Hydrogenation b. Halogenation c. Hydrohalogenation d. Hydration
85. The solvent used for the preparation of Grignard reagent.
A. Alcohol B. Ether C. Acid D. Ester
86. Which of the following alcohol will react faster with HBr?
a. n-butanol c. 2-butanol
b. 2-methyl-1-propanol d. 2-methyl-2-propanol
87. An industrial source of alcohol.
a. Coal b. Fats c. Sugar d. Ethers
88. The enzyme that aids in the fermentation of sugarto alcohol.
a. Diastase b. Zymase c. Maltase d. Glucosidase
89. Which method is not used in the preparation of simple alcohol.
a. Hydration of alkenes c. Fermentation of sugar
b. Hydrolysis of alkyl halides d. Oxidation of alkenes
90. The method of preparation that gives high percentage of alcohol.
a. Diborane method b. Hydrolysis c. Sulfonation d. Reduction
91. A toxic compound formed by distillation of ethylene glycol.
a. Diethylene glycol b. Diethyl ether c. Ethylene oxide d. Dioxane
92. Which compound has the highest density?
a. Fluorobutane b. 2-methyl-1-iodopentane c.Chloropentane d. Bromohexane
93. Alcohol act as an acid if it reacts with;
a. HBr b. CH3ONa c. K d. NaOH
94. A reaction of esterthat will produce anotherester.
a. Alcoholysis b. Ammonolysis c. Hydrolysis d. Ozonolysis
95. A soap use for water proofing.
a. Ag soap b. Al soap c. Cr soap d. Cu soap
96. A soap used as dusting powder.
a. Al palmitate b. Cu oleate c. K laurate d. Zn stearate
97. A soap used for treating ulcer.
a. Al palmitate b. Cu oleate c. K laurate d. Zn stearate
98. An esterused as banana flavoring.
a. ethylmethanoate b. methylpentanoate c. pentylethanoate d. octylethanoate
99. An inorganic esterthat lowers blood pressure.
a. ethyl nitrate b. ethyl sulfate c. pentyl nitrate d. glyceryl trinitrate
100. The flavor imparted by isoamyisovalerate.
a. Apple b. Banana c. Pear d. Pineapple
101. The acid secretad by ants.
a. Methanoic acid b. Ethanoic acid c. Propanoic acid d. Butanoic acid
102. An aldehyde that smells like green apple.
a. Methanal b. Ethanal c. Propanal d. Butanal
103. A ketone with ethereal fragrance.
a. Methanone b. Ethanone c. Propanone d. Butanone
104. The test for the presence of methyl carbonyl.
a. Benidect’s b. Fehling’s c. Haloforms d. Tollen’s
105. An organic salt used as dye fastener.
a. Al ethanoate b. Ca stearate c Fe butyrate d. Na chloride
106. A colorless and poisonous gas with an unpleasant odor.
a. Acrolein b. Acrilan c. Crotonaldehyde d. Ketene
107. An inorganic ester used as explosive.
a. ethyl nitrate b. ethyl sulfate c. pentyl nitrate d. glyceryl trinitrate
108. A reducing test that gives a brick red precipitate with aldehydes.
a. Benidect’s b. Millon’s c. Schiff’s d. Tollen’s

5. ORGANIC CHEMISTRY AND SAFETY
109. The primary source of alkanes.
a. Petroleum b. Marsh gas c. Natural gas d. Biomass
110. The study of the three dimensional structure of molecules.
a. Nomenclature b. Stereochemistry c Structural theory d. Isomerism
111. An exothermic reaction of alkanes
a. Combustion b. Reduction c. Pyrolysis d. Hydrogenation
112. Thermal decomposition of alkanes.
a. Hydrogenation b. Combustion c. Oxidation d. Pyrolysis
113. Which of the alkanes below has the lowest boiling point
a. n-pentane b. isopentane c. neopentane d. Sec-pentane
114. Which of the alkanes below has the highest density
a. 2,3-dimethylhexane b. 3-methyl hexane c. iso-hexane d. n-hexane
115. The molecule that exhibit electrovalent bond.
a. NaH b. NH3 c. HI d. H2O2
116. The molecule with sp2 hybrid.
a. NH3 b. BF3 c. H2O d. CHCl3
117. The molecule with pi bond.
a. H2S b. HCHO c. CH3NO2 d. HClO
118. the molecule with linear structure.
a. BF3 b. H2O c. CO2 d. SF6
119. Which molecule has a coordinate covalent bond.
a. HCN b. HBrO2 c. HClO d. H3PO3
120. The electron acceptor in CH3NO2
a. C b. N c. O d. H
121. The electron donor in H2SO4
a. H b. O c. S d. NOTA
122. The formal charge of P in H3PO3
a. +2 b. +1 c. 0 d. -1
123. The structure of SO2 molecule.
a. linear b. planar c. tetragonal d. tetrahedral
1 2 3 4 5 6
Given: HC=C=CH-C≡C-CH3
124. Which of the numbered carbon in the given structure has sp2 hybrid.
a. C-1 b. C-2 c. C-4 d. C-6
125. What is the structure of C-2?
a. linear b. planar c. tetragonal d. tetrahedral
126. What is the bond angle between C-1, C-2 & C-3?
a. 90O b. 109O c. 120O d. 180O
127. Which has the shortest bond length?
a. C2&C3 b. C3&C4 c. C4&C5 d. C5&C6
128. Ethyl butanoate is an artificial flavor for
a. apple b. banana c. orange d. pineapple
129. The aldehyde used as preservative.
a. Butanal b. Propanal c. Ethanal d. Methanal
130. An organic compound formed when an acid reacts with an alcohol.
a. Aldehyde b. Ether c. Ester d. Ketone
131. The IUPAC name of the simplest ketone.
a. Butanone b. Pentanone c. Hexanone d. Propanone
132. Freon is an example of
a. hydrocarbon b. alkyl halide c. alcohol d. aldehyde
133. Rubbing alcohol is an example of
a. normal alcohol b. primary alcohol c. secondary alcohol d. tertiary alcohol
134. The ester which gives pineapple its flavor.
a. Ethyl ethanoate b. Butyl ethanoate c. Ethyl butanoate d. Propyl butanoate
135. The hydrocarbon used as reference in measuring the quality of gasoline.
a. n - hexane b. n – heptane c. n – pentane d. n – octane
136. The alcohol present in all drinking liquor.
a. Methyl alcohol b. Ethyl alcohol c. Isopropyl alcohol d. Amyl alcohol
137. Compounds having the same molecular formula but different molecular structures are
a. isotopes b. covalent compounds c. ionic compounds d. isomers
138. The number of structuralformulas possible for the alkyne C6H10.
a. two b. three c. four d. five
139. An organic compound with pleasant odor.
a. Aldehyde b. Alcohol c. Ester d. Ether
140. The acid responsible for the irritating sting of ants.
a. Formic acid b. Acetic acid c. Citric acid d. Lactic acid
141. Methanalis used as
a. refrigerant b. antiseptic c. preservative ` d. fuel
142. Oxidizing liquids react with everything , potentially causing explosions or corrosions on surfaces. To prevent explosion and
possible corrosion on surfaces, liquid oxidizers can be safely stored with
a. Oxidizing Acids b. Liquid Bases c. Dry Solids d. No compatible storage group

6. ORGANIC CHEMISTRY AND SAFETY
143. The walls, ceilings, and floors of an inside storage roomfor flammables must be constructed of materials having at least:
a. 2-hr fire resistance b. 3-hr fire resistance c. 4-hr fire resistance d. 5-hr fire resistance
144. Flammable materials may be stored in flammable storage cabinets which meet OSHA and National Fire Protection
Association specifications. These require that cabinet contents are protected from temperatures exceeding ____ for at least _ __
minutes, enough time for personnel to evacuate the area.
a. 250oF – 15 minutes b. 325oF – 10 minutes c. 250oF – 10 minutes d. 325oF – 15 minutes
145. Under proper conditions, these chemicals will form explosive peroxides which can be detonated by shock or heat. Which of
the following that is required to be discarded after 3 months
a. 2-butanol b. styrene c. Diethyl ether d. Isopropyl ether
146. Under proper conditions, these chemicals will form explosive peroxides which can be detonated by shock or heat. Which of
the following that is required to be discarded after 12 months
a. PotassiumMetal b. sodium amide c. diethyl ether d. isopropyl ether
147. In order to prevent contact of chemicals with other chemicals that may result to explosion, storage of chemical must be:
a. Alphabetical b. Random c. As per container d. As per group compatibility
148. Perchloric acid, picric acid, picrates and ethers are potentially explosive chemicals. Which of these potentially explos ive
chemicals, if allowed to dry on wood or other combustibles, will explode and cause a fire on impact or friction.
a. Perchloric Acid b. Picric Acid c. Picrates d. Ethers
149. Liquid bases (Group 5) may be stored with flammables in the flammable cabinet if _______ are not present
a. Dry solids b. Volatile Poisons c. Non-Volatile Liquid d. Organic and Mineral Acids
150. __________ must be double-contained and should be segregated in their own compartment in a safety cabinet. When
quantities are small (e.g., 1 or 2 bottles) they do not warrant a separate compartment.
a. Oxidizing Acids b. Flammables c. Liquid bases d. Dry Solids
151. Include liquids with flashpoints < 100°F.
a. Flammable liquids b. Volatile Poison c. Liquid Oxidizers d. Oxidizing Acids
152. Acetic anhydride and trichloroacetic anhydride are corrosive. These acids are very reactive with other acids and should
not be stored in this group. It is better to store themwith organic compounds in
a. Dry solids b. Non-volatile poisons c. Metal hydrides d. Oxidizing acids
153. Anhydrides (e.g., acetic and trichloroacetic) are organic acids; however, it is better to store themwith this group, since they
are highly reactive with other acids. What group is this?
a. Dry solids b. Non-volatile poisons c. Metal hydrides d. Oxidizing acids
154. Most metal hydrides react violently with water, some ignite spontaneously in air. Examples include sodium borohydride,
calcium hydride, and lithium aluminum hydride. They are considered:
a. Combustible b. Flammable c. Pyrophoric d. None
155. If securely double-contained to prevent contact with water or air, metal hydrides may be stored in the same area
as ____________.
a. Oxidizing Acids b. Flammables c. Liquid bases d. Dry Solids
156. Opening/expiration dates must be assigned to chemicals with the following functional groups/chemical prop erties
a. Perchlorates b. Picrates c. Peroxides d. All of the above
157. Alphabetical arrangement of chemicals can inadvertently place two incompatible chemicals next to each other, which in th e
event that the containers break or leak could react violently. Which of the following combinations will cause explosion or
potential explosion on contact:
a. CuS + Cd(ClO3)2 b. Al + NH4NO3 c. HgO + Mg d. All of the above
158. To minimize the rate of decomposition, peroxides and peroxidizable materials should be stored at the lowest possible
temperature consistent with their solubility and _________
a. Boiling Point b. Freezing Point c. Melting Point d. All of the above
159. Oxidizers must be stored away from incompatible materials such as:
a. Organic liquids b. Finely divided metals c. Greases d. All of the above
160. ___________ must not be stored with water, carbon dioxide, carbon tetrachloride and other chlorinated hydrocarbons
a. Oxygen b. Alkali Metals c. Chlorine d. All of the above
161. A common laboratory chemical which should not be stored with concentrated sulfuric or nitric acid mixtures
a. Acetic Acid b. Acetylene c. Acetone d. All of the above
162. A common laboratory chemical which should not be stored with glycerine, ethylene glycol, benzaldehyde, and sulfuric acid
a. Acetic Acid b. KMnO4 c. Acetone d. All of the above
163. A common laboratory chemical which should not be stored with acetylene, ammonia and chlorine
a. Oxygen b. Aniline c. Iodine d. All of the above
164. A common laboratory chemical which should not be stored with oils. Grease, hydrogen and other flammable materials
a. Oxygen b. Bromine c. Chlorine d. All of the above
165. Which of the following is not an oxidizing acid
a. Nitric Acid b. sulfuric Acid c. Chromic Acid d. Hydrochloric acid
166. Which of the following pictogram indicates a highly flammable, corrosive and pyrophoric
a b . c. d. None of the above
167. Which of the following pictogram indicates and oxidizer
a b . c. d. None of the above

7. ORGANIC CHEMISTRY AND SAFETY
168. It is a document that is prepared to provide guidance on the hazards and properties of chemicals, which will help to safely
handle it and to make the concerned people aware of the PPE’s to be used for handling the chemicals.
a. Safety Handbook b. Safety Instruction c. Safety Procedure d. Safety data Sheet
169. Which of the following is the route of entry of chemicals to the human body
a. Inhalation b. Absorption c. Ingestion d. All of the above
170. Examples include benzidine, cyanogen bromide, ethylmaleimide, oxalic acid, potassiumcyanide, and sodium cyanide. They
belong to the chemical storage group as:
a. Flammables b. Dry Solids c. Oxidizing Acids d. Organic and Mineral Acids
171. Which of the following compounds would have the highest boiling point?
(a) CH3CH2CH2CH3 (b) CH3NH2 (c) CH3OH (d) CH2F2
172. What is the IUPAC name for the following compound?
(a)1,3-pentamethylpropane (b)1,1,3,3-tetramethylbutane (c)2,4,4-trimethylpentane (d)2,2,4-trimethylpentane
173. The reaction of propene with HBr in the presence of ROOR (peroxide) proceeds through which of the following
intermediates? Ans.B
174. What is the major product expected from the following reaction? Ans. D
175. Which of the following compounds is aromatic? Ans.B
176. Which of the following would not be a reasonable nucleophile in a SN2 reaction?
a) NH3 b) NC- c) H2O d) HO-
177. Which of the following compounds is the strongest Br�nsted base?
(a) H2PO4
- (b) HSO4
- (c) NO3
- (d) CH3COO-
178. What is the best reagent to convert isopropyl alcohol to isopropyl bromide?
a.) HBr b) SOBr2 c) Br2 d) CH3MgBr
179. . What is the IUPAC name for CH3CHClCH(CH3)CH2CH2CH2CH2Br?
a) 1-bromo-6-chloro-5-methylheptane b) 7-bromo-2-chloro-3-methylheptane
c) 1-bromo-6-chloro-5,6-dimethylhexane d) 6-bromo-1-chloro-1,2-dimethylhexane
180. Which of the following is 2-ethyl-3-formyl-pentanoic acid?
a) C2H5CH(C2H5)CH(CO2H)CHO b) (C2H5)2CHCH(CHO)CO2H
c) C2H5CH2CH(CHO)CO2C2H5 d) C2H5CH(CHO)CH(C2H5)CO2H
181. Which of the following reagents would be best for reducing an esterto an aldehyde?
a) LiAlH4 in ether b) B2H6 in ether
c) NaBH4 in aqueous ethanol d) diisobutylaluminum hydride (DIBAH) in toluene at -78 ºC
182. Which one of the following compounds would react with C2H5MgBr to make 3-pentanol ?
a) ethanol b) ethyl formate c) acetic acid d) acetone
183. Which of the following reactions is most likely to produce ethyl propanoate?
a) sodiumethoxide + propanoic acid b) propanol + acetyl chloride
c) sodiumpropanoate + acetic anhydride d) potassiumpropanoate + ethyl iodide
184. The reaction CH2CH2 + H2 --> CH3CH3 is an example of
a. Substitution b. Addition c. Esterification d. Fermentation
185. Which compound has the highest melting point?
a. decane b. 2,2,3,3-tetramethylbutane c. 2,2,3-trimethylpentane d. 4-methylnonane
186. A glycoside is the carbohydrate form of an
a. ether. b. acetal c. aglycone. d. alcohol
187. Which of the following is 3,3-diphenylpropanal?
a) C6H5CH2CH(C6H5)CHO b) C6H5CH2CH2COC6H5 c) (C6H5)2CHCH2CHO d) (C6H5)2CHCH2COC6H5
188. Which of the following molecules will not have a dipole moment?
a) CH3Cl b) CH3OCH3 c) CH2Cl2 d) CCl4
189. Which of the following compounds has no isomer?
a) CH3CH2CH2Cla b) CH3CHO c) CH2=CHCl d) ClCH2CH2Cl

8. ORGANIC CHEMISTRY AND SAFETY
190. In which compound are dipole–dipole interactions present?
a) HCl b) C6H6 c) CH4 d) NaCl
191. Which compound has a permanent dipole moment?
a) CO2 b) H2 c) CH4 d) CO
192. Which element can take part in hydrogen bonding?
a) F b) O c) N d) all of them
193. Which compound must overcome hydrogen bonds when it boils?
a) Ethyl chloride, CH3CH2Cl
b) Ethylamine, CH3CH2NH2
c) Ethane, C2H6
d) Diethyl ether, C2H5OC2H5
194. Which is the most polarizable compound?
a) Butane, C4H10 b) Iodine, I2 c) Carbon dioxide, CO2 d) Hydrogen sulfide, H2S
195. Which force of interaction makes the nonpolar pentane,C5H12 , exist as a liquid?
a) ion–dipole interaction b) van der Waals forces c) dispersion forces d) dipole–dipole attraction
196. Which compound has greater dispersion forces than dipole-dipole interaction between its molecules?.
a) Benzene, C6H6
b) Fluoroethane, CH3CH2F
c) Lauric acid, CH3(CH2)10COOH
d) Toluene, C6H5CH
197. Which hydrocarbon has the lowest boiling point?
a) Ethane, C2H6 b) Ethene, C2H4 c) Acetylene,C2H2 d) Benzene, C6H6
198. Which of the following has the highest boiling point?
a) Acetone,CH3COCH3 b) Dimethyl ether, CH3OCH3 c) Acetic acid, CH3COOH d) Acetaldehyde,CH3CHO
199. Which of the following statements is correct?
a) The greater the molecular weight, the lower the b.p
b) The greater the molecular attraction, the higher the b.p
c) The smaller the molecular weight, the higher the b.p
d) The greater the molecular attraction, the higher the vapor pressure
200. Which of the following factors will not affect the rate of vaporization of the liquid?
a) temperature b) amount of liquid c) intermolecular forces d) surface area
201. Which is the strongest base? Ans.A
202. Which is the strongest acid?
a.phenol b. p-Methylphenol c. p-nitrophenol d. p-bromophenol
203. Which test distinguishes glucose (a monosaccharide) from sucrose (a disaccharide)?
a. Benedict's test b. Fehling's Test c. Barfoed's Test d. Tollen's Test
204. Which is the test for reducing sugars in which the silver ion (in silver nitrate) is reduced to a silver mirror?
a. Benedict's test b. Fehling's Test c. Barfoed's Test d. Tollen's Test
205. How much reducing sugaris indicated by a green to yellow precipitate produced by an oxidizing solution of
sodium carbonate,sodium citrate, and copper sulfate pentahydrate?
a. Large amount b. Moderate amount c. Trace amount d. None
206. Which of the following occurs in the chemistry of the breathalyzer?
a) oxidation of alcohol with potassiumdichromate to an aldehyde
b) oxidation of alcohol with potassiumdichromate to a carboxylic acid
c) oxidation of alcohol with potassiumdichromate to an ester
d) oxidation of alcohol with potassiumdichromate to a ketone
207. Which reaction is the basis of soapmaking?
a) Fischer esterification a carboxylic acid by an alcohol
b) Alkaline hydrolysis of the esters of glycerol
c) Acetylation of a hydroxybenzoic acid by acetic anhydride
d) Oxidation of alcohol with Sodium dichromate
208. Which reaction produces acetaminophen, the analgesic and antipyretic that is safe to use during pregnancy?
a) Aminolysis of p-Hydroxyaniline
b) Acetylation of p-Hydroxybenzoic acid with acetic anhydride
c) Acetylation of p-Hydroxyaniline with acetic anhydride
d) Acylation of p-Hydroxyaniline with and acid chloride
209. Which reaction of alkenes is used to partially harden oil and improve spreadability of margarines?
a) Complete Hydration b) Complete Hydrogenation c) Partial Hydration d) Partial hydrogenation
210. Which pair of functional group and characteristic reaction type are NOT a match?
a Alkane, Radical Substitution b) Alkyl halide, Nucleophilic Substitution
c) Alkyne, Electrophilic Substitution d) Carboxylic acid, Nucleophilic Acyl Substitution

9. ORGANIC CHEMISTRY AND SAFETY
211. Which set of source compound, reaction, and product are NOT a match?
a) Alkane, Radical Halogenation, Alkyl halide b) Alkyne, Hydrogenation, Alkan
c) Alcohol, Dehydration, Alkene d) Ketone, Oxidation, Carboxylic acid
212. The hybridization of the central carbon in CH3C≡N and the bond angle CCN are
a. sp2, 180°. b. sp, 180°. c. sp2, 120°. d. sp3, 109°.
213. Which of the following statements about an sp hybridized carbon is FALSE?
a. It is divalent. b. It forms bonds that are linear.
c. It has two p orbitals. d. It always forms triple bonds to carbon.
214. Which molecule has the largest dipole moment?
a. HCl b. CCl4 c. H2S d. CO2
215. The correct geometry around oxygen in CH3OCH3 is
a. linear. b. bent. c. tetrahedral. d. trigonal planar
216. Which of the following may be separated by ordinary physical methods?
a. a pair of identical molecules b. a pair of enantiomers
c. a pair of diastereomers d. a pair of identical atoms
217. The balanced equation for the combustion of pentane is
a. 4 C5H12 + 2 O2 → 20 CH4 + 4 H2O b. 2 C3H8 + O2 → CH4 + 2 H2O
c. C5H12 + 8 O2 → 5 CO2 + 6 H2O d. C3H8 + 5 O2 → 3 CO2 + 4 H2O
218. Predict which of the following compounds will have a lower boiling point than 1-butanal.
a. 1-butanol b. 2-butanol c. 1-butene d. butanoic acid
219. A glycoside is the carbohydrate form of an
a. ether. b. acetal. c. aglycone. d. alcohol.
220. Which of the following amino acids is achiral?
a. alanine b. glycine c. serine d. cysteine
221. Which of the following is NOT a part of the primary protein structure?
a. the amino acid sequence b. the disulfide linkages
c. the planar nature of the amide linkage d. the conformation of the polypeptide backbone
222. Which of the following statements about an enzyme is FALSE?
a. An enzyme is usually a large protein. b. An enzyme is a catalyst for biological reactions.
c. An enzyme is a chiral molecule. d. An enzyme changes the equilibrium constant of a reaction.
223. For numbers 30 - 34, choose from the following:
a) Potassium permanganate (KMnO4), H2SO4 - disappearance of violet color
b) Phthalic anhydride - turns pink in basic medium
c) Ferric chloride (FeCl3), NH4OH - red to violet solution
d) Potassium Permanganate (KMnO4), neutral - brown precipitate
224. Which is a general test for the presence of carboxylic acid? Ans.C
225. Which is a specific test for oxalic acid? Ans. A
226. Which is a test for the presence of phenol? Ans.D
227. Which is a test for the presence of hydroquinone? Ans.B
228. Molecules that are fundamentally hydrocarbons but that have additional atoms or groups of atoms
a. Derivatives b. Functional group c. Carbonyl group d. All of the above
229. Hydrocarbons that contain at least one carbon-carbon double bond.
a. Alkane b. Alkene c. Alkyne d. None
230. Anothername for tetrachloromethane
a. Chloroform b. Carbon Tetrachloride c. Freon d. None