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WorksheetsBasic organic chemistry 2
Total questions: 12
Worksheet time: 18mins
____________ isomers occur when the types, number and bonds (connectivity) of the atoms are the same, but have a restricted rotation somewhere in a molecule. The common example is the double bond.
Optical
Chain
Geometric
Position
Which of the following compounds is the enantiomer of the above compound?
All of the above
Which of the following compounds exhibits stereoisomerism?
Butanal
Propanoic acid
1-bromohexane
3,4-dichloropent-1-ene
The molecular formula C5H12 contains how many isomeric alkanes?
1
2
3
4
Which of the following compound(s) exhibit(s) cis-trans isomerism?
(1) 1,2-dibromo-1,2-dichloroethene
(2) 3,3-dibromo-2-chloropropene
(3) 1,2-dichloropropene
(1) only
(2) only
(1) and (3) only
(2) and (3) only
The most unstable conformer in cyclohexane?
Boat
Chair
Twist boat
half chair
Chlorination of alkanes is an example of
Elimination reaction
Free radical substitution reaction
Nucleophilic substitution reaction
Electrophilic addition reaction
Most stable conformation of cyclohexane is
chair
boat
twist boat
half chair
Which of the following compound has gauche as it stable conformer?
n-butane
n-propane
1,2-dicloroethane
1,2-dihydroxyethane
Can enantiomer rotates plane-polarised light?
Yes in all situations
No because it is optically active
Yes but it can only rotate the polarised light in opposite direction
No due to its restricted rotation of carbon-carbon double bond
Can 2-cyanopentane exists as a pair of enantiomers?
Yes,because it is a electrophlie.
No,it is not an optical isomer.
Yes,because it contains a chiral carbon bonded to four different atoms or groups.
Choose the possible structures of 2-methylbutanoic acid.
