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

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

Tags

NGSS.HS-PS1-2

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.

Tags

NGSS.HS-PS1-1

NGSS.HS-PS1-2

What is the empirical formula of 4-hydroxypent-2-ene?

• C₅H₁₂O

• C₅H₁₀O

• CH₂O

• C₅H₉OH

Which of the following mechanisms does not occur in reactions of bromoethane?

• Electrophilic addition

• Elimination

• Nucleophilic substitution

• Radical substitution

Tetradecane (C₁₄H₃₀) is an alkane found in crude oil. When tetradecane is heated to a high temperature, one molecule of tetradecane decomposes to form one molecule of hexane and three more molecules.

Which of the following could represent this reaction?

• C₁₄H₃₀ → C₆H₁₄ + C₄H₈ + 2C₂H₄

• C₁₄H₃₀ → C₆H₁₄ + C₆H₁₂ + C₂H₄

• C₁₄H₃₀ → C₅H₁₂ + 3C₃H₆

• C₁₄H₃₀ → C₆H₁₄ + C₂H₆ + 2C₃H₆

Tags

NGSS.HS-PS1-2

NGSS.HS-PS1-4

NGSS.HS-PS1-7