Organic Chemistry Questions And Answers

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In which of the following is generally true of most organic compounds?
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Their bonding is covalent in nature.
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In which of the following classes of organic compounds is an oxygen atom bonded to a hydrogen atom?
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Alcohols
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In which of the following classes of organic compounds is an oxygen atom bonded to a hydrogen atom?
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Carboxylic Acids
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Which of the following classes of compounds can be categorized as primary, secondary or, tertiary?
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Amines
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Which of the following is an example of a secondary alcohol?
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CH3CHCH3 with an OH coming off from the second carbon.
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Which of the following is an example of a primary amine?
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ALL OF THESE, CH3NH2; CH3CH2NH2, AND CH3CH2CH2NH2.
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Which of the following is an example of a secondary amine?
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CH3CH2CH2NHCH3
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Which of the following is an example of a carboxylic ester?
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CH3COCH3 with an oxygen double bond coming off from the second carbon
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Of the four alcohols with molecular formula C4H10-O; how many are primary alcohols?
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Two
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Which of the following functional groups does not contain a carbonyl group?
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a. ester b. alcohol c. aldehyde d. keytone
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Compounds which contain only carbon-carbon single bonds are classified as which of the following?
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Alkanes
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Compounds which contain a carbon-carbon double bond are classified as which of the following?
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Alkenes
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Compounds which contain a carbon-carbon triple bond are classified as which of the following?
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Alkynes
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What is the name given to a -CH2- group?
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Methylene
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Dodecane is a 12 carbon alkane. How many hydrogen atoms are in dodecane?
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26
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Which of the following compounds are constitutional isomers?
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All of them.
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Which of the following are representations of the same molecule?
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?
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Which of the following is(are) constitutional isomer(s) of hexane, CH3(CH2)4CH3?
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CH3CCH2CH3 with 2 CH3’s coming off from the second carbon.
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Given the compounds 2,3-dimethylpentane, 3-ethylpentane and 3-methylhexane, which are constitutional isomers of one another?
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All of these, 2,3-dimethylpentane and 3-ethylpentane, 2,3-dimethylpentane and 3-methylhexane, and 3-ethylpentane and 3-methylhexane.
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Which of the following is a correct IUPAC name? 1-methylpentane, 2-ethylpentane, or 3-ethylpentane
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3-ethylpentane
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Which of the following is the correct line-angle structure for 3-ethylheptane?
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?
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The production of chloromethane by the reaciton of methane gas with chlorine gas is an example of which type of reaction?
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Substitution
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Given an alkane, an alkene, and an alkyne, each of which contains two carbon atoms, which compound will contain the fewest hydrogen atoms?
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The alkyne
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Which of the following is true in the IUPAC system for naming alkenes?
answer

The alkene is named based on the longest carbon chain which contains the double bond.
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Which of the following is not a correct IUPAC name for an alkene?
answer

?
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What is the correct IUPAC name for the following compound?
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2,3-dimethyl-2-hexene
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Which of the following is the most characteristic reaction of alkenes?
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a. addition, b. oxidation, c. reduction d. substitution
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Which of the listed products will be formed in the following reaction?
answer

Copy from paper
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What product is obtained by the hydrobromination of 2-methyl-1-pentene?
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2-bromo-2-methylpentane
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What type of alcohol is formed by the hydration of 1-butene?
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a. primary, b. secondary, c. tertiary, d. none of these, the product is not an alcohol.
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Which alcohol is formed by the hydration of 2-methyl-2-pentene?
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Copy from paper
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Which product is formed by the chlorination of 2-methyl-1-butene?
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1,2-dichloro-2-methylbutane
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On what basis was the name aromatic originally given to compounds?
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Their odors were considered to be pleasant.
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Which of the following compounds is aniline?
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An OH coming off from a benzene ring.
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What is an acceptable name of CH2CH3 on top of the benzene ring and CH2CH3 on the third carbon?
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m-diethylbenzene
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What is the IUPAC name for the following compound. Br on the first carbon, NH2 on the third carbon, and Cl on the 4th carbon of a benzene ring?
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5-bromo-2-chloroaniline
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Which of the following structures represents 2,4,6-tribromophenol?
answer

OH on top, Br on carbon 2, Br on carbon 4, and Br on carbon 6 of a benzene ring.
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Which of the following structures represents m-nitrobenzoic acid?
answer

?
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Which aromatic ring substitution reaction is used in the preparation of synthetic detergents?
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Sulfonation
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In a phenol, which group is the substituent on the benzene ring?
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Hydroxyl
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What organic product is formed when benzene reacts with nitric acid in the presence of concentrated sulfuric acid?
answer

?
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Which of the following compounds is found in peppers?
answer

Capsaicin
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Which of the following is the correct IUPAC name of CH3CH2CH2 on carbon 1 and OH on carbon 2 of a benzene ring?
answer

2-propyl-1-hydroxybenzene
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Which of the following elements is present in thiols but not in alcohols?
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a. C, b. O, C. P, d. S
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What is the IUPAC name of the following compound?
answer

?
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What is the IUPAC name of CH3CH2CH2CHCH3 with an OH coming off from the 4th carbon from the left?
answer

2-pentanol
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What is the IUPAC name of CH3CHCH2CHCH3 with a CH3CH2 coming off from the 2nd carbon and an OH coming off from the 4th carbon?
answer

4-methyl-2-hexanol
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Which of the following is true about the polarities of the C-O and O-H bonds?
answer

?
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Which of the following classes of compounds react with sodium hydroxide to give a water-soluble salt?
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?
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Which of the following alcohols will undergo acid-catalyzed dehydration most easily?
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?
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Which of the following is the major product obtained from the dehydration of 2,3-dimethyl-3-pentanol?
answer

?
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If experimental conditions are carefully controlled, aldehydes can be obtained by the oxidation of which of the following?
answer

?
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Keytones can be obtained by the oxidation of which of the following?
answer

?
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Which type of functional group has a phenol backbone?
answer

A compound that contains a hydroxyl group bonded to a benzene ring.
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What is Thymol and Vanillin good for?
answer

They are important constituents of thyme and vanilla beans, respectively.

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