ISOMERISM JEE

The number of structural isomers for C₆H₁₄ is

• 3

• 4

• 5

• 6

Which one of the following conformations of cyclohexane is chiral?

(1) Boat

(2) Twist boat

(3) Rigid

(4) Chair

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The alkene that exhibits geometrical isomerism is

(1) propene

(2) 2-methylpropene

(3) 2-butene

(4) 2-methyl -2-butene

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• 4

Which types of isomerism is shown by 2,3-dichlorobutane?

(1) Diastereo

(2) Optical

(3) Geometric

(4) Structural

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Of the five isomeric hexanes, the isomer which can give two monochlorinated compounds is

(1) n-hexane

(2) 2, 3-dimethylbutane

(3) 2, 2-dimethylbutane

(4) 2- methylpentane

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Which of the following compounds is not chiral?

(1) 1-chloropentane

(2) 3-chloro-2-methyl pentane

(3) 1-chloro -2-methyl pentane

(4) 2-chloropentane

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Which of the following will have meso-isomer also?

(1) 2- chlorobutane

(2) 2- hydroxypropanoic acid

(3) 2,3- dichloropentane

(4) 2-3- dichlorobutane

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Racemic mixture is formed by mixing two

(1) isomeric compounds

(2) chiral compounds

(3) meso compounds

(4) optical isomers

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A similarity between optical and geometrical isomerism is that

(1) each forms an equal number of isomers for a given compound

(2) If in a compound one is present then so is the other

(3) both are included in stereoisomerism

(4) they have no similarity

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Which of the following does not show geometrical isomerism?

(1) 1, 2-dichloro -1 – pentene

(2) 1, 3 – dichloro – 2 – pentene

(3) 1, 1 – dichloro – 1 – pentene

(4) 1, 4 – dichloro – 2 – pentene

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