Organic Chemistry Questions and Answers – Nomenclature | Organic Chemistry Multiple Choice Questions and Answers

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Questions
1 Saturated hydrocarbons are otherwise referred as ________________
A Alkanes
B Alkenes
C Alkynes
D Alkaloids

Answer: Alkanes
2 Identify the correct alkane name for the molecular formula C30H62.
A Propdecane
B Eicosane
C Triacontane
D Dodecane

Answer: Triacontane
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3 Identify the smallest alkane which can form a ring structure (cycloalkane)?
A Cyclomethane
B Methane
C Cyclopropane
D Propane

Answer: Cyclopropane
4 In which among the following alkane, a carbon atom is displaced so as to form a compactly structure with the resemblance of a butterfly wing?
A Cyclopropane
B Cyclobutane
C Cyclopentane
D Cyclohexane

Answer: Cyclobutane
5 The first step in IUPAC nomenclature is to identify the total number of carbon atoms present in the compound.
A True
B False

Answer: False
6 The substituent in the chain is named by replacing the “ane” in the alkanes by _________
A ene
B ic
C one
D yl

Answer: yl
7 The C=C bond in the chain of the compound considered is shown by _________
A Specifying the number of carbon atoms associated with the bond
B Specifying the number of carbon atoms at beginning of the C=C bond
C Specifying the number of carbon atoms at end of the C=C bond
D Specifying the number of carbon atoms in the entire chain

Answer: Specifying the number of carbon atoms at beginning of the C=C bond
8 Dienes are the name given to compounds with _________
A Exactly a double bond
B Exactly a triple bond
C Exactly two double bond
D More than two double bond

Answer: Exactly two double bond
9 Triple bond with two carbon atoms on either side is called _________
A Methnyl group
B Ethynyl group
C Propionyl group
D Propargyl group

Answer: Ethynyl group
10 The substituent groups that are commonly associated with benzene ring are _________
A Phenyl and benzyl
B Propyl and phenyl
C Methyl and benzyl
D Butyl and phenyl

Answer: Phenyl and benzyl
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