plumiGrignard reagents and lengthening carbon chains: Edexcel International A Level Chemistry questions
Edexcel International A Level Chemistry past-paper questions on 20.1.2 Grignard reagents and lengthening carbon chains, 2019–2025, with mark schemes and examiner’s reports where available.
All papers
All years
Q18(e)
The whole paper ↗
Loading the start of the question…
Loading the question…
Open the full PDFQ18(f)
The whole paper ↗Loading the start of the question…
Loading the question…
Open the full PDFLoading the question…
Open the full PDFQ19(c)
The whole paper ↗
Loading the start of the question…
Loading the question…
Open the full PDFQ12(a)
The whole paper ↗
Loading the start of the question…
Loading the question…
Open the full PDFYour answerQ12(b)
The whole paper ↗Loading the start of the question…
Loading the question…
Open the full PDFYour answerQ15(b)
The whole paper ↗Loading the question…
Open the full PDFQ20(b)
The whole paper ↗
Loading the start of the question…
Loading the question…
Open the full PDFLoading the question…
Open the full PDFYour answerQ12(a)
The whole paper ↗
Loading the start of the question…
Loading the question…
Open the full PDFYour answerQ12(b)
The whole paper ↗Loading the start of the question…
Loading the question…
Open the full PDFYour answerQ9(a)
The whole paper ↗
Loading the start of the question…
Loading the question…
Open the full PDFYour answerQ9(c)
The whole paper ↗Loading the start of the question…
Loading the question…
Open the full PDFYour answerQ9(d)
The whole paper ↗Loading the start of the question…
Loading the question…
Open the full PDFYour answerQ16(a)
The whole paper ↗
Loading the start of the question…
Loading the question…
Open the full PDFLoading the question…
Open the full PDFYour answerQ20(c)
The whole paper ↗
Loading the start of the question…
Loading the question…
Open the full PDFLoading the question…
Open the full PDFYour answer
All 18 questions on Grignard reagents and lengthening carbon chains, as a list
- June 2025 (A), Unit 5, Q18(e) (1 mark): Name the type of reagent used in Step 5. (1)
- June 2025 (A), Unit 5, Q18(f) (1 mark): Draw a possible structure of K that could be formed in Step 5. (1)
- January 2025, Unit 5, Q19 (6 marks): Grignard reagents are used to increase the length of the carbon chain in organic molecules. An outline synthesis of propanoic acid from ethanoic acid is shown.
- October 2024, Unit 5, Q19(c) (7 marks): Raspberry ketone can also be synthesised in the laboratory using a Grignard reagent via a multi-step process. The overall reaction is shown. OH O HO HO Devise t
- June 2024, Unit 5, Q12(a) (1 mark): Which metal is involved in the formation of a Grignard reagent? (1) A chromium B copper C magnesium D manganese
- June 2024, Unit 5, Q12(b) (1 mark): What best describes the role of a Grignard reagent in increasing the length of a carbon chain? (1) A reducing agent B oxidising agent C nucleophile D electrophi
- January 2024, Unit 5, Q15(b) (7 marks): Cooking fresh ginger converts gingerol into zingerone, which is less pungent and has a sweeter flavour. Zingerone can be formed in a four‑step synthesis from co
- October 2023, Unit 5, Q20(b) (7 marks): Devise a synthesis to convert bromobenzene into benzamide. Include reagents, conditions and the structures of the intermediate compounds. O Br C NH2 bromobenzen
- June 2023, Unit 5, Q20 (1 mark): Which carbonyl compound and Grignard reagent would not react to form compound Y? OH compound Y Carbonyl compound Grignard reagent O BrMg A O B BrMg O C BrMgCH3
- January 2023, Unit 5, Q12(a) (1 mark): What type of reaction occurs with a Grignard reagent? (1) A electrophilic addition B free radical substitution C oxidation D nucleophilic addition
- January 2023, Unit 5, Q12(b) (1 mark): Benzaldehyde reacts with a Grignard reagent, followed by hydrolysis, to form 2-methyl-1-phenylbutan-1-ol. OH CH3 H H O C C C C C H H H H H H What is the formula
- June 2022, Unit 5, Q9(a) (1 mark): Which solvent is used in this preparation? (1) A ethanol B ether C pentane D propanone
- June 2022, Unit 5, Q9(c) (1 mark): The structure of 2-methylpropylmagnesium bromide is shown. MgBr Which statement best describes the circled carbon atom? (1) A positive and electrophilic B posit
- June 2022, Unit 5, Q9(d) (1 mark): Which compound reacts with 2‑methylpropylmagnesium bromide to form 4‑ethyl‑2‑methylheptan‑4‑ol? OH MgBr 2‑methylpropylmagnesium bromide 4‑ethyl‑2‑methylheptan‑4
- January 2022, Unit 5, Q16(a) (6 marks): Devise a reaction scheme to produce benzoic acid from benzene, via bromobenzene and then a Grignard reagent. Include the reagents and essential conditions for e
- October 2021, Unit 5, Q16 (1 mark): Grignard reagents react with A water giving primary alcohols B all aldehydes giving secondary alcohols C ketones giving secondary or tertiary alcohols D carbon
- January 2021, Unit 5, Q20(c) (5 marks): Devise a reaction scheme to prepare 2-methylbut-2-ene from butanone, using no more than four steps. Identify the reagents and essential conditions for each step
- October 2020, Unit 5, Q11 (1 mark): Which organic compound reacts with a Grignard reagent to give a product that forms a secondary alcohol on hydrolysis? A carbon dioxide B ethanal C methanal D pr
Questions, mark schemes and examiner’s reports are © Pearson Edexcel, from their published past papers. Plumi isn’t affiliated with any exam board. Want whole papers? Edexcel International A Level Chemistry past papers.
The Plumi iPad app also offers exam-style questions with AI feedback on your handwritten working.