Chemistry 9701 · AS & A Level · Halogen compounds

Halogen compounds — practice question

Bromine takes part in reactions with a range of organic compounds. For each reaction below, complete the balanced equation, including the structural formula of the organic product, and state any conditions needed, together with the type of reaction that occurs.
(a(i))[4]

Complete the balanced reaction for bromine with phenol, including the structural formula of the organic product. State the conditions and identify the reaction type.

(a(ii))[3]

Complete the balanced reaction for bromine with cyclohexene, including the structural formula of the organic product. State the conditions and identify the reaction type.

(a(iii))[3]

Complete the balanced reaction for bromine with cyclohexane, including the structural formula of the organic product. State the conditions and identify the reaction type.

(b(i))[3]

Suggest the identities of compounds C, D and E, and draw their structures in the boxes provided.

(b(ii))[3]

Using the relevant letter, C, D or E, identify which of your compounds will react with each of the following reagents. A reagent may react with more than one of C, D and E; if so, name all of the compounds that react with it: 2,4-dinitrophenylhydrazine; alkaline aqueous iodine; aqueous sodium hydroxide.

Worked solution & mark scheme

This 16-mark question has a full step-by-step worked solution and mark scheme. One marking point: $ ext{Br}_2 ext{(aq)}$, electrophilic substitution, tribromophenol is formed

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