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which of the following about alkenes are NOT true?

a) alkenes are aliphatic hydrocarbons

b) alkenes only contain c-c and c-h sigma bonds

c) alkenes are acyclic or cyclic

d) acyclic alkenes have two fewer h atoms than cyclic alkenes with the same number of carbons

d) acyclic alkenes have two fewer h atoms than cyclic alkenes with the same number of carbons

which of the following statements about alkenes is true?

a) alkenes are aliphatic hydrocarbons having c-c and c-h pi bonds

b) cyclic alkenes have two fewer h atoms with the same number of carbons

c) acyclic alkenes contain carbon joined in one or more rings

d) acyclic alkenes have general molecular formula CnH2n

b) cyclic alkenes have two fewer h atoms with the same number of carbons

what is the molecular formula of an alkene that has twenty-three carbon atoms?

a) c23h46

b)c23h48

c) c23h50

d) c23h44

b)c23h48

what is the molecular formula of a cycloalkane that has six carbon atoms?

a)c4h14

b) c6h10

c) c6h12

d) c6h16

c) c6h12

what is the approximate c-c-c bond angle in propane?

a) 90

b) 109.5

c) 120

d) 180

b) 109.5

what is the hybridization of a carbon atom in an alkene

a) sp3

b) sp2

c) sp

d) p

hybrid for c atom in alkene:

a) sp3

how many constitutional isomers are there with the molecular formula c5h12?

a) 2

b) 3

c) 4

d) 5

FOR C5H12:

B) 3

how many constitutional isomers are there with the molecular formula c6h14?

a) 2

b) 3

c) 4

d) 5

FOR C6H14:

d) 5

FOR 2-methylbutane

D) IV

which of the following compounds has primary, secondary, tertiary and quaternary carbon atoms?

a) pentane

b) 2-methylpentane

c) 2,2-dimethylpentane

d) 2,2,3-trimethylpentane

d) 2,2,3-trimethylpentane

for primary, secondary, tertiary and quaternary carbon atoms?

THERE IS NO “ONLY” IN THIS

which of the following compounds has only primary and secondary carbon atoms?

a) pentane

b) 2-methylpentane

c) 2,2-dimethylpentane

d) 2,2,3-trimethylpentane

a) pentane

has only primary and secondary carbon atoms

which of the following compounds has only primary, secondary and tertiary carbon atoms?

a) pentane

b) 2-methylpentane

c) 2,2-dimethylpentane

d) 2,2,3-trimethylpentane

b) 2-methylpentane

only has primary, secondary and tertiary carbon atoms

which of the following has only primary, secondary, tertiary, and quaternary carbon atoms?

a) pentane

b) 2-methylpentane

c) 2,2-dimethylpentane

d) 2,2,3-trimethylpentane

c) 2,2-dimethylpentane

only has primary, secondary, tertiary, and quaternary carbon atoms

which of the following has primary, secondary, and tertiary hydrogen atoms?

a) pentane

b) hexane

c) 2-methylpentane

d) 2,2-dimethylpentane

c) 2-methylpentane

for primary, secondary, and tertiary HYDROGEN atoms

which of the following compounds has only primary and secondary hydrogen atoms?

a) 2-methylpentane

b) 2,2,3-trimethylpentane

c) 3-methylpentane

d) 2,2,3-triethylpentane

d) 2,2,3-triethylpentane

only has primary and secondary hydrogen atoms

its ETHYL. not METHYL

how many constitutional isomers (excluding stereoisomers) are there with the molecular formula C5H10

a) 2

b) 3

c) 4

d) 5

d) 5 constitutional isomers for C5H10

What is the parent chain for the following compound?

a) hexane

b) heptane

c) octane

d) nonane

c) octane

c) nonane

what is the name of the alkyl group that contains two carbons in a straight chain and one-carbon branch?

a) ethyl

b) propyl

c) isopropyl

d) none

c) isopropyl

What is the IUPAC name for the tollowing compound?

a) 4-ethyl-5-methyloctane

b) 4-methyl-5-ethyloctane

c) 4-methyl-3-propylheptane

d) 4-methyl-5-propyloctane

a) 4-ethyl-5-methyloctane

What is the IUPAC name for the following compound?

a) 3,5-diethyl-6-methylheptane

b) 3,5-diethyl-2-methylheptane

c) 3-ethyl-5-isopropylheptane

d) 5-ethyl-3-isopropylheptane

b) 3,5-diethyl-2-methylheptane

What is the IUPAC name for the following compound?

a) 2,3-dimethyl-4-sec-butylheptane

b) 4-sec-butyl-2,3-dimethy heptane

c) 3,5,6-trimethyl-4-propylheptane

d) 2,3,5-trimethyl-4-propylheptane

d) 2,3,5-trimethyl-4-propylheptane

What is the IUPAC name for the following compound?

a) 5-ethyl-3,6-dimethylheptane

b) 3-ethyl-2,5-dimethylheptane

c) 3-ethyl-2,5-dimethyloctane

d) 5-ethyl-3,6-dimethyloctane

b) 3-ethyl-2,5-dimethylheptane

What is the IUPAC name for the following compound?

a) 2,3,5-trimethylhexane

b) 2,4,5-triethylhexane

c) 2,4-diethyl-5-methylheptane

d) 4-ethyl-3,6-dimethyloctane

d) 4-ethyl-3,6-dimethyloctane

What is the IUPAC name for the following compound?

a) 3-Ethyl-2,7-dimethyl-5-sec-butyldecane

b) 5-sec-Butyl-3-ethyl-2,7-dimethyldecane

c) 2,7-Dimethyl-3-ethyl-5-sec-

butyldecane

d) 3-Ethyl-2,7-dimethyl-5-isobutyldecane

b) 5-sec-Butyl-3-ethyl-2,7-dimethyldecane

What is the IUPAC name for the following compound?

a) 3-ethyl-1-methylcyclohexane

b) 1-ethyl-3-methylcyclohexane

c) 1-ethyl-3-methylhexane

d) 3-ethyl-1-methylhexane

b) 1-ethyl-3-methylcyclohexane

What is the IUPAC name for the following compound?

a) 1-sec-butyl-4-isopropyl-2-methylcyclohexane

b) 1-isopropyl-3-methyl-4-sec-butylcyclohexane

c) 4-isopropyl-2-methyl-1-sec-butylcyclohexane

d) 1-sec-butyl-3-isopropyl-2-methylcyclohexane

a) 1-sec-butyl-4-isopropyl-2-methylcyclohexane

What is the IUPAC name for the following compound?

a) 1,4-dimethylcyclohexane

b) 1,3-dimethylcyclohexane

c) 1,3-dimethylcyclopentane

d) 1,4-dimethylcyclopentane

c) 1,3-dimethylcyclopentane

What is the IUPAC name for the following compound?

a) 1-butylcyclohexane

b) Cyclohexanebutane

c) 1-Cyclohexylbutane

d) Butylcyclohexane

d) Butylcyclohexane

What is the IUPAC name for the following compound?

a) Hexylcyclopentane

b) 1-Hexylcyclopentane

c) 1-cyclopentlyhexane

d) 1-cyclopentylheptane

c) 1-cyclopentlyhexane

What is the IUPAC name for the following compound?

a) 1-butyl-3-methylcyclohexane

b)1-sec-butyl-3-methylcyclohexane

c) 1-methyl-3-sec-butylcyclohexane

d)1-sec-butyl-3-methylhexane

b) 1-sec-butyl-3-methylcyclohexane

What is the common name of the following alkyl group?

a) isobutyl

b) sec-butyl

c) isopropyl

d) tert-butyl

b) sec-butyl

What is the common name of the following alkyl group?

a) isobutyl

b) sec-butyl

c) isopropyl

d) tert-butyl

a) isobutyl

Rank the following alkanes in order of decreasing boiling point, putting the alkane with the highest boiling point first.

a) I > II > III

b) I > III > II

c) II > III > I

d) III > II > I

b) I > III > II for DECREASING bpt

Rank the following alkanes in order of increasing boiling point, putting the alkane with the lowest boiling point first.

a) I > II > III

b) I > III > II

c) II > III > I

d) III > II > I

a) I > II > III

Which of the following statements about the conformations of acyclic alkanes is true?

a) Conformations are the same arrangements of atoms that cannot be interconverted

b) In the eclipsed conformation, the C-H bonds on one carbon bisect the H-C-H bond angle on the adjacent carbon

c) In the staggered conformation, the C-H bonds on one carbon are directly aligned with the C-H bonds on the adjacent carbon

d) Rotating the atoms on one carbon by 60 degrees converts an eclipsed conformation into a staggered conformation, and vice versa

d) Rotating the atoms on one carbon by 60 degrees converts an eclipsed conformation into a staggered conformation, and vice versa

Which of the following statements about the conformations of acyclic alkanes is not true?

a) The staggered and eclipsed conformations are equally stable

b) The staggered conformations are more stable than the eclipsed conformations

c) An energy minimum and maximum occur every 60 as the conformation changes from staggered to eclipsed

d) Conformations that are neither staggered nor eclipsed are intermediate in energy

a) The staggered and eclipsed conformations are equally stable

Which of the following statements about the conformations of acyclic alkanes is true?

a) A staggered conformation with two larger groups 180 from each other is called gauche

b) staggered conformations are at energy maxima and eclipsed conformations are energy minima

c) A staggered conformation with two larger groups 60 form each other is called anti

d) Gauche conformers are generally higher in energy than anti conformations

d) Gauche conformers are generally higher in energy than anti conformations

D) IV

B) I and III

D) II, IV

B is highest in energy

B) IV > I > III > II

C) III for HIGHEST energy

B) II for LOWEST energy

which of the following cycloalkanes have the MOST angle strain?

a) cyclopropane

b) cyclobutane

c) cylopentane

d) cyclohexane

a) cyclopropane

has the MOST angle strain

which of the following cycloalkanes have the LEAST angle strain?

a) cyclopropane

b) cyclohexane

c) cyclopentane

d) cycloheptane

b) cyclohexane

for LOWEST angle strain

D) IV

A) I

C) III

D) IV

B) II

B) II

A) I

Ranking:

C) III > IV > II > I

what are the products of combustions of alkenes?

carbon dioxide and water