Organic Chemistry Term 1

The correct systematic name for molecule in the image is ...

• 2-ethyl-3,4-dimethylpent-2-ene

• 4-ethyl-2,3-dimethylpent-3-ene

• 2,3,4-trimethylhex-3-ene

• 3,4,5-trimethylhex-3-ene

CH₂O is the empirical formula of

• methanol

• methyl methanoate

• ethane-1,2-diol

• butanal

Z-Retinal, shown in the diagram, is a component in vitamin A. Which of the double bonds, labelled A, B, C or D, is responsible for the letter Z in the name?

• A

• B

• C

• D

The correct name for the alkene monomer which forms the polymer shown below is ...

• 2-methyl-3-ethylpropene

• 2-methylpent-2-ene

• 2-methylpent-3-ene

• 4-methylpent-2-ene

The structure of cyclohexene is shown. Which of the following is the general formula of cyclic alkenes such as cyclohexene?

• C_nH_2n–4

• C_nH_2n–2

• C_nH_2n

• C_nH_2n+2

Which of the arrows, labelled A, B, C or D in the mechanism in the diagram, is not correct?

• A

• B

• C

• D

Which compound does not show stereoisomerism?

• 1,2-dichloropropene

• 1,2-dichloropropane

• 1,3-dichloropropene

• 1,3-dichloropropane

Which equation is a propagation step in the conversion of trichloromethane into tetrachloromethane by reaction with chlorine in the presence of ultraviolet light?

• CHCl₃ + Cl₂ ⟶ CCl₄ + HCl

• ●CCl₃ + ●Cl ⟶ CCl₄

• CHCl₃ + ●Cl ⟶ CCl₄ + ●H

• ●CCl₃ + Cl₂ ⟶ CCl₄ + ●Cl

How many structural isomers are there with the molecular formula C₃H₆BrCl?

• 4

• 5

• 6

• 7

Which of the following is a correct mechanism for the formation of 2-methylbut-2-ene

from 2-bromo-3-methylbutane?

• A

• B

• C

• D