WJEC A Level Chemistry
WJEC A Level Chemistry 2.7 Alcohols and Carboxylic Acids Exam Questions
Free WJEC A Level Chemistry exam questions on 2.7 Alcohols and Carboxylic Acids, with mark schemes. Covers making ethanol, oxidation of alcohols, dehydration, carboxylic acids and esters.
2.7 Alcohols and Carboxylic Acids 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.
StemUp mark scheme flashcards
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.
£16.99View flashcards
About WJEC A Level Chemistry 2.7 Alcohols and Carboxylic Acids
This topic covers the reactions of alcohols and acids.
What you need to know
- Making ethanol Fermentation versus hydration of ethene.
- Oxidation Primary alcohols to aldehydes then carboxylic acids; secondary to ketones using acidified dichromate.
- Dehydration Alcohols form alkenes with an acid catalyst.
- Carboxylic acids Acidic reactions and esterification.
Common mistakes in 2.7 Alcohols and Carboxylic Acids
- Saying tertiary alcohols are oxidised.
- Forgetting distillation versus reflux conditions.
- Wrong colour change for dichromate.
Try three 2.7 Alcohols and Carboxylic Acids exam-style questions
1. State the colour change when a primary alcohol is oxidised by acidified dichromate. (1 mark)
Show the mark scheme answer
Orange to green.
2. Explain how to obtain an aldehyde rather than a carboxylic acid. (2 marks)
Show the mark scheme answer
Distil the product as it forms (1) so it is not further oxidised (1).
3. Give one advantage of making ethanol by fermentation. (1 mark)
Show the mark scheme answer
It uses renewable feedstock.
2.7 Alcohols and Carboxylic Acids FAQs
What does Alcohols and Carboxylic Acids cover?
Production of ethanol, oxidation and dehydration of alcohols, and carboxylic acid reactions.
Which practical links here?
Preparing an organic liquid using reflux and distillation.
What is esterification?
Reaction of an alcohol with a carboxylic acid using an acid catalyst to form an ester and water.
Revise this topic with flashcards: WJEC A Level Chemistry Flashcards, with mark scheme answers for Anki and Quizlet.
