M6S10 – Isomerism Year 2

Which of these statements is true of a solution of a racemic mixture?

(i) It contains asymmetric molecules,

(ii) It is a mixture of enantiomers,

(iii) It contains equal amounts of optical isomers,

(iv) It rotates the plane of polarised light

Which of these compounds can exist in two enantiomeric forms?

(i) 2-methylbutan-1-ol,

(ii) 2-bromo-1-chlorobutane,

(iii) 2-chloropentane,

(iv) 1-chlorobutane

Which of these compounds are chiral?

(i) propan-1-ol,

(ii) propan-2-ol,

(iii) butan-1-ol,

(iv) butan-2-ol

Which of these compounds are chiral?

(i) CH₂Cl₂

(ii) CH₂ClBr

(iii)CHCl₂F

(iv) CH₃CHClBr

Which of these molecules are polar?

(i) trans but-2-ene,

(ii) trans 1,2-dichloroethene,

(iii) cis but-2-ene,

(iv) cis 1,2-dichloroethene

The two compounds formed on heating 3-bromo-2-methylpentane with KOH in ethanol (which causes elimination!) are:

(i) alkenes,

(ii) position isomers,

(iii) hydrocarbons,

(iv) E/Z isomers

Which of these compounds have E/Z isomers?

(i) pent-2-ene,

(ii) 2-methylpent-2-ene,

(iii) 1,2-dichloropropene,

(iv) hex-1-ene

Which of these types of isomerism are examples of stereoisomerism.

(i) chain isomerism

(ii) E/Zisomerism

(iii) functional group isomerism

(iv) optical isomersim

Which of these compounds are functional group isomers of

HCO₂CH₂CH₂CH₃?

(i) ethyl ethanoate,

(ii) 2-methylpropanoic acid,

(iii) methyl propanoate,

(iv) butanoic acid

Which of these compounds are chain isomers of 2-methylpentane

(i) hexane,

(ii) 2,2-dimethylpentane,

(iii) 2,3-dimethylbutane,

(iv) 2,2-dimethylpropane