Alkenes

What is the major product of the reaction between but-1-ene and DBr? (D is deuterium and represents ²H)

• CH₂DCH₂CH₂CH₂Br

• CH₂DCH₂CHBrCH₃

• CH₃CH₂CHBrCH₂D

• CH₃CH₂CHDCH₂Br

In which of the following is a curly arrow used incorrectly?

• A

• B

• C

• D

The structure of the molecule of methyl 2-methylpropenoate is shown below. Which one of the following statements concerning this compound is not true?

• It displays geometrical isomerism.

• It forms an addition polymer.

• It undergoes reduction.

• It decolourises bromine.

The correct systematic name for the molecule shown is ...

• 2-ethyl-3,4-dimethylpent-2-ene

• 4-ethyl-2,3-dimethylpent-3-ene

• 2,3,4-trirnethylhex-3-ene

• 3,4,5-trimethylhex-3-ene

The repeating unit of a polymer is shown above. Which of the following molecules would form a polymer containing this repeating unit?

• But-1-ene

• E-but-2-ene

• Z-but-2-ene

• Methylpropene

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

• 2-methyl-3-ethylpropene

• 2-methylpent-2-ene

• 2-methylpent-3-ene

• 4-methylpent-2-ene

Which one of the following mechanisms is not involved in the reaction sequence below?

CH₃CH₃ → CH₃CH₂Cl → CH₃CH₂OH → CH₂=CH₂ → CH₃CH₂Br

• electrophilic addition

• electrophilic substitution

• nucleophilic substitution

• free-radical substitution

Which is the major product of the reaction between 2-methylbut-2-ene and iodine monochloride (ICl)?

• A

• B

• C

• D

Which statement about ethene is correct?

• It has no geometric isomers because there is free rotation around the C=C bond.

• It reacts with HBr in a nucleophilic addition reaction.

• It burns in excess oxygen to produce carbon dioxide and water.

• The C=C bond is twice as strong as the C–C bond in ethane.

Which statement is correct about poly(chloroethene)?

• It has the empirical formula CHCl

• It decolourises bromine water.

• Its brittleness is reduced by plasticisers.

• Its polymer chain contains alternate single and double bonds.