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Worksheets3.3.7 Optical isomerism
Total questions: 9
Worksheet time: 5mins
Which pair of compounds does not form a racemic mixture when the compounds react?
Which compound does not show stereoisomerism?
1,2-dichloropropene
1,2-dichloropropane
1,3-dichloropropene
1,3-dichloropropane
Which compound forms optically active compounds on reduction?
CH3CH2C(CH3)=CHCH3
CH3CH2C(CH3)=CH2
CH3COCH3
CH3CH2COCH3
Which one of the following can exhibit both geometrical and optical isomerism?
(CH3)2C=CHCH(CH3)CH2CH3
CH3CH2CH=CHCH(CH3)CH2CH3
(CH3)2C=C(CH2CH3)2
CH3CH2CH(CH3)CH(CH3)C=CH2
Which one of the following reactions will produce an organic compound that has optical isomers?
dehydration of butan-2-ol by heating with concentrated sulphuric acid
reduction of pentan-3-one by warming with NaBH4
addition of Br2 to 3-bromopropene
reduction of 2,3-dimethylpent-2-ene with H2 in the presence of a nickel catalyst
Ibuprofen is a drug used as an alternative to aspirin for the relief of pain, fever and inflammation. The structure of ibuprofen is shown.
Which one of the following statements is not correct?
It has optical isomers.
It liberates carbon dioxide with sodium carbonate solution.
It undergoes esterification with ethanol.
It undergoes oxidation with acidified potassium dichromate(VI).
Which one of the following statements about but-2-enal, CH3CH=CHCHO, is not true?
It has stereoisomers.
It shows a strong absorption in the infra-red at about 1700 cm−1.
It will turn an acidified solution of potassium dichromate(VI) green.
It can be dehydrated by concentrated sulphuric acid.
On reduction, a racemate can be formed by
CH3CH2CH2CH2CHO
CH3CH2CH2COCH3
CH3CH2COCH2CH3
CH3CH=CHCH2CHO
Which one of the following reaction mixtures would give a product capable of exhibiting optical isomerism?
CH3CH=CH2 + HBr
CH3CH2CH2Br + NaOH
CH3CH2CH2OH + H2SO4
CH3CH2 CHO + HCN
