WJEC A Level Chemistry
WJEC A Level Chemistry 2.6 Halogenoalkanes Exam Questions
Free WJEC A Level Chemistry exam questions on 2.6 Halogenoalkanes, with mark schemes. Covers nucleophilic substitution, elimination, reactivity and environmental impact.
2.6 Halogenoalkanes exam questions
1 question pack of real past exam questions with its mark scheme. Answer every question without notes, then mark your answers line by line against the mark scheme.
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WJEC A Level Chemistry Flashcards (Anki & Quizlet)
Every answer is written in mark scheme wording, so you learn exactly what examiners give marks for. Use them on Anki or Quizlet, then test yourself with the questions on this page.
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About WJEC A Level Chemistry 2.6 Halogenoalkanes
This topic covers halogenoalkane reactions and mechanisms.
What you need to know
- Nucleophilic substitution With OH⁻ to form alcohols and with NH₃ or CN⁻ in other reactions.
- Elimination Ethanolic hydroxide forms alkenes.
- Reactivity Rate depends on C-X bond enthalpy: C-I reacts fastest.
- Uses and impact CFCs and their replacement.
Common mistakes in 2.6 Halogenoalkanes
- Saying bond polarity controls the rate rather than bond enthalpy.
- Confusing aqueous and ethanolic conditions.
- Drawing the curly arrow from the halogen.
Try three 2.6 Halogenoalkanes exam-style questions
1. State the conditions to make an alcohol from a halogenoalkane. (1 mark)
Show the mark scheme answer
Warm with aqueous sodium hydroxide.
2. Explain why iodoalkanes hydrolyse fastest. (2 marks)
Show the mark scheme answer
The C-I bond is the weakest (1), so it breaks most easily (1).
3. Name the type of reaction with ethanolic KOH. (1 mark)
Show the mark scheme answer
Elimination.
2.6 Halogenoalkanes FAQs
What does Halogenoalkanes cover?
Nucleophilic substitution, elimination, reactivity trends and environmental impact.
Which practical links here?
Comparing hydrolysis rates using silver nitrate.
Why were CFCs banned?
They release chlorine radicals that destroy ozone.
Revise this topic with flashcards: WJEC A Level Chemistry Flashcards, with mark scheme answers for Anki and Quizlet.
