WJEC A Level Chemistry
WJEC A Level Chemistry 4.6 Amines Exam Questions
Free WJEC A Level Chemistry exam questions on 4.6 Amines, with mark schemes. Covers preparation, basicity and reactions of amines, and azo dyes.
4.6 Amines 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 4.6 Amines
This topic covers amines and their uses.
What you need to know
- Basicity Lone pair on nitrogen accepts protons; aliphatic amines are stronger bases than aromatic amines.
- Preparation From halogenoalkanes with ammonia or reduction of nitro compounds.
- Reactions With acids and acyl chlorides.
- Azo dyes Diazotisation of phenylamine below 10 °C and coupling with phenol.
Common mistakes in 4.6 Amines
- Saying phenylamine is a stronger base than ethylamine.
- Forgetting the low temperature for diazonium salts.
- Confusing amines and amides.
Try three 4.6 Amines exam-style questions
1. Explain why ethylamine is a stronger base than ammonia. (2 marks)
Show the mark scheme answer
The ethyl group donates electrons (1), increasing electron density on nitrogen (1).
2. State why diazotisation is done below 10 °C. (1 mark)
Show the mark scheme answer
Diazonium salts decompose at higher temperatures.
3. Name the reagent used to reduce nitrobenzene. (1 mark)
Show the mark scheme answer
Tin and concentrated hydrochloric acid.
4.6 Amines FAQs
What does Amines cover?
Preparation, basicity and reactions of amines and azo dyes.
Why is phenylamine a weak base?
The lone pair is delocalised into the benzene ring.
What are azo dyes used for?
Colouring textiles and foods.
Revise this topic with flashcards: WJEC A Level Chemistry Flashcards, with mark scheme answers for Anki and Quizlet.
