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Organic Chemistry -
Formulas, Names & Properties

Examples of
Multiple Choice Questions

What makes carbon such a unique element?
(a) Elemental carbon comes in two forms, diamond and graphite.
(b) Carbon forms four bonds, although the ground state configuration would predict the formation of fewer bonds.
(c) Carbon forms covalent bonds rather than ionic bonds.
(d) To a greater extent than any other element, carbon can bond to itself to form straight chains, branched chains and rings.
(e) Carbon has two stable isotopes, carbon-12 and carbon-13.

The hybridization of carbon atoms in alkanes is
(a) sp
(b) sp2
(c) sp3
(d) sp3d
(e) sp3d2

A molecule with the formula C3H8 is a(n):
(a) hexane
(b) propane
(c) decane
(d) butane
(e) ethane

Select the correct IUPAC name for:

(a) 5-methyl-5-ethyloctane
(b) 5-methyl-5-propylheptane
(c) 4-ethyl-4-methyloctane
(d) 3-methyl-3-propyloctane
(e) 3-methyl-3-propylheptane

Select the correct IUPAC name for:

(a) 1,1,3-trimethylpentane
(b) 1-ethyl-1,3-dimethylbutane
(c) 2,4-dimethylhexane
(d) 3,5-dimethylhexane
(e) 3,5,5-trimethylpentane

Select the correct IUPAC name for:

(a) 1,4-dimethylcyclopentane
(b) 1,3-dimethylcyclopentane
(c) 2,5-dimethylcyclopentane
(d) 2,3-dimethylcyclopentane
(e) 2,4-dimethylcyclopentane

The general formula for noncyclic alkenes is:
(a) CnH2n+2
(b) CnH2n
(c) CnH2n-2
(d) CnHn+2
(e) CnHn

The correct name for the compound given below is:
(a) 2-methyl-1-butene
(b) 2-ethyl-1-propene
(c) 2-ethyl-1-pentane
(d) 3-methyl-2-butene
(e) pentene

Select the best name for:

(a) 4-ethyl-cis-3-octene
(b) 4-ethyl-trans-3-octene
(c) 4-butyl-cis-3-hexene
(d) 5-ethyl-trans-5-octene
(e) 5-ethyl-cis-5-octene

Name the following compound:

(a) 6-ethyl-4-methylcyclohexene
(b) 6-ethyl-3-methylcyclohexene
(c) 3-ethyl-5-methylcyclohexene
(d) 6-ethyl-4-methylcyclohex-1-ene
(e) 6,4-dialkylcyclohexene

What is the IUPAC name of the following compound?

(a) 2,6-diethyl-3-nonyne
(b) 2,5-diethyl-3-nonyne
(c) 3,7-dimethyl-5-nonyne
(d) 3,7-dimethyl-4-nonyne
(e) 2,6-diethyl-3-heptyne

The following chemical structure represents a molecule of what molecular formula?

(a) C8H10
(b) C6H6
(c) C6H8
(d) C8H12
(e) C8H6

How many actual double bonds does the benzene ring possess?
(a) None, carbon-carbon bonds in benzene are delocalized around the ring
(b) 1 double bond
(c) 2 double bonds
(d) 3 double bonds
(e) 4 double bonds

Para-xylene is the same as:
(a) 1,2-dimethylbenzene
(b) 1,3-diethylbenzene
(c) 1,3-dimethylbenzene
(d) 1,4-diethylbenzene
(e) 1,4-dimethylbenzene

Which of the following formulas represents an alkene?
(a) CH3CH2CH3
(b) CH3CH3
(d) CH3CH2Cl
(e) CHCH

What is the name of the following compound?

(a) 1,3-dibromophenol
(b) 2,5-dibromophenol
(c) 2,6-dibromophenol
(d) m-dibromophenol
(e) o-dibromophenol

Which one of the following is a secondary alcohol?
(a) CH3CH2OH
(b) CH3OH
(c) CH3CH(OH)CH3
(d) (CH3)C3OH
(e) none of these

Select the IUPAC name for: (CH3)2CHCH(OH)CH2C(CH3)3.
(a) 2,5,5-trimethyl-3-hexanol
(b) 1,1,4,4-pentamethylbutanol
(c) 1,1-dimethylisopentanol
(d) 2,5-dimethyl-4-hexanol
(e) none of these

Which is NOT a physical property of alcohols or phenols?
(a) Phenols are generally only slightly soluble in water.
(b) The solubilities of normal primary alcohols in water decrease with increasing molecular weight.
(c) The hydroxyl group of an alcohol is nonpolar.
(d) Due to hydrogen bonding, boiling points of alcohols are much higher than those of corresponding alkanes.
(e) Boiling points of normal primary alcohols increase with increasing molecular weight.

Give the IUPAC name of this compound: CH3OCH2CH3.
(a) dimethyl ether
(b) methoxyethane
(c) methylethyloxide
(d) propyl ether
(e) none of the above

The compound below is classified as a _____ .
(a) primary amine
(b) secondary amine
(c) tertiary amine
(d) primary amide
(e) secondary amide

The systematic name for the compound in Problem 21 is _____ .
(a) pentyl amine
(b) methyl-n-propyl amine
(c) diethyl amine
(d) 2-aminopentane
(e) isobutylamine

Select the IUPAC name for the compound below.

(a) 2,4-dimethylpentanoic acid
(b) 1,1,3-trimethylbutanoic acid
(c) 1-hydroxy-2,4-dimethylpentanone
(d) 2-carboxyisohexane
(e) none of these

Select the best name for:
(a) m-chlorobenzoic acid
(b) o-chlorobenzaldehyde
(c) p-chlorobenzoate
(d) m-chlorosalicylic acid
(e) none of these

The best classification for the following compound is: _____ .
(a) aldehyde
(b) ester
(c) ketone
(d) carboxylic acid
(e) alcohol

The compound given below is called _____ .
(a) butyl acetate
(b) ethyl pentanoate
(c) propyl pentanoate
(d) ethyl butanoate
(e) butyl ethanoate

The compound illustrated below is called _____ .
(a) acetamide
(b) formyl acetamide
(c) dimethyl acetate
(d) N,N-dimethylformamide
(e) dimethylamine

The functional group given below is characteristic of organic _____ .
(a) ketones
(b) acids
(c) aldehydes
(d) esters
(e) alcohols


1. (d) 2. (c) 3. (b) 4. (c) 5. (c) 6. (b) 7. (b) 8. (a) 9. (a) 10. (c) 11. (d) 12. (a) 13. (a) 14. (e) 15. (c) 16. (c) 17. (c) 18. (a) 19. (c) 20. (b) 21. (b) 22. (d) 23. (a) 24. (a) 25. (b) 26. (b) 27. (d) 28. (a)

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| Atomic Structure | Chemical Periodicity | Chemical Bonding | Molecular Structure/Covalent Bonding Theories| Molecular Orbital Theory |
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| Aqueous Equilibrium - Slightly Soluble Salts | Electrochemistry | Metallurgy | Metal Properties & Rxns | Nonmetals & Metalloids |
| Coordination Compounds | Nuclear Chemistry | Organic Chem - Formulas/Names/Properties | Organic Chem - Shapes/Rxns/Biopolymers |

To report any corrections, please e-mail Dr. Wendy Keeney-Kennicutt.