Y12 Mechanisms AQA

Which equation represents an initiation step?

• A

• B

• C

• D

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

• A

• B

• C

• D

Which one of the following is least likely to occur in the reaction between methane and chlorine?

• A

• B

• C

• D

Which species is produced in a propagation step during the reaction of propane with an excess of chlorine in the presence of UV light?

• A

• B

• C

• D

Which species could act as a nucleophile?

• A

• B

• C

• D

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

• A

• B

• C

• D

This question is about a method that can be used to prepare ethylamine.

CH₃CH₂Br + 2NH₃ -> CH₃CH₂NH₂ + NH₄Br

• A

• B

• C

• D

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

How many different alkenes are formed when 2-bromo-3-methylbutane reacts with ethanolic potassium hydroxide?

• 2

• 3

• 5

• 5

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