Eduqas A Level Chemistry
Eduqas A Level Chemistry OA4 Organic Synthesis and Analysis Exam Questions
Free Eduqas A Level Chemistry exam questions on OA4 Organic Synthesis and Analysis, with mark schemes. Covers multi-step synthesis, functional group conversions, purification and analysis.
OA4 Organic Synthesis and Analysis 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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A Level Chemistry Flashcards
Every answer is written in mark scheme wording, so you learn exactly what examiners give marks for. Pick your exam board, then test yourself with the questions on this page.
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About Eduqas A Level Chemistry OA4 Organic Synthesis and Analysis
This topic brings organic chemistry together. Expect multi-step route questions.
What you need to know
- Synthesis Planning routes between functional groups with reagents and conditions.
- Techniques Reflux, distillation, recrystallisation and melting point determination.
- Analysis Combining mass spectrometry, IR and NMR to identify products.
- Yield Calculating overall yield over several steps.
Common mistakes in OA4 Organic Synthesis and Analysis
- Missing conditions in synthesis routes.
- Using the wrong technique to purify a solid.
- Not justifying structures from all spectra.
Try three OA4 Organic Synthesis and Analysis exam-style questions
1. Suggest a two-step route from ethene to ethanoic acid. (2 marks)
Show the mark scheme answer
Hydration with steam and phosphoric acid to ethanol (1); oxidation with acidified dichromate under reflux to ethanoic acid (1).
2. Explain how recrystallisation purifies a solid. (2 marks)
Show the mark scheme answer
Dissolve in minimum hot solvent (1); cool so the product crystallises while impurities stay dissolved (1).
3. State how melting point shows purity. (1 mark)
Show the mark scheme answer
A pure solid melts sharply at its known melting point.
OA4 Organic Synthesis and Analysis FAQs
What does Organic Synthesis and Analysis cover?
Synthesis routes, practical techniques and spectroscopic analysis.
Which practicals link here?
Preparing and purifying an organic solid and determining its melting point.
How do I learn routes?
Draw a reaction map linking functional groups with reagents.
Revise this topic with flashcards: A Level Chemistry Flashcards, with mark scheme answers for Anki and Quizlet.
