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Worksheets3.3.1.2 Reaction mechanisms
Total questions: 13
Worksheet time: 7mins
Which equation represents an initiation step?
Which statement is correct about the molecule shown?
It reacts with HBr in an electrophilic substitution reaction.
It reacts with NaBH4 in a nucleophilic addition-elimination reaction.
It reacts with ethanolic KOH in an elimination reaction.
It reacts with KCN in a nucleophilic substitution reaction.
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
The reaction sequence shows how CH3CH3 can be converted into BrCH2CH2Br
Which step occurs by nucleophilic substitution?
Step A
Step B
Step C
Step D
In concentrated alkali, propanone reacts with hydroxide ions to form an equilibrium mixture as shown.
Which curly arrow does not appear in the mechanism of this reaction?
Which of the arrows, labelled A, B, C or D in the mechanism in the diagram, is not correct?
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?
Which one of the following types of reaction mechanism is not involved in the above sequence?
free-radical substitution
nucleophilic substitution
elimination
nucleophilic addition-elimination
Refer to the following reaction sequence:
Which one of the following types of reaction mechanism is not involved in the above sequence?
electrophilic addition
electrophilic substitution
addition−elimination
elimination
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
In which of the following is a curly arrow used incorrectly?
Which one of the following can react both by nucleophilic addition and by nucleophilic substitution?
In which one of the following are the curly arrows not used correctly?
