plumiOrganic reactions: OCR A‑Level Chemistry B questions
Every OCR A-Level Chemistry B exam question on PL Organic reactions (specification points PL(m)–(n)), 2016–2025, with its mark scheme and examiner’s report.
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Calculations
Q1(a)(ii)
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Q2(c)
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Q2(c)
The whole paper ↗![June 2023 Paper 2, question 2(c): The students boil some phenacetin with aqueous acid. H N O O Phenacetin Draw the structures of the two products formed in the boxes below. [2]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/h43302-jun23-02-c-qp.webp?v=3)
Q2(d)
The whole paper ↗![June 2023 Paper 2, question 2(d): Compound A reacts with propanoyl chloride. Draw the skeletal formula of the organic compound formed in the box below. NH2 O Compound A [2]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/h43302-jun23-02-d-qp.webp?v=3)
Q33(e)(ii)
The whole paper ↗![June 2022 Paper 1, question 33(e)(ii): Give the structural formula of the aromatic product formed in the reaction between HOC6H4COCl and CH3NH2. [1]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/h43301-jun22-33-eii-qp.webp?v=3)
Q35(f)
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Q34(b)
The whole paper ↗![November 2021 Paper 1, question 34(b): The students carry out a similar reaction, as shown below. Complete the equation for their reaction. O H Cl OC2H5 N OC2H5 + + NH2 O O O compound C [1]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/h43301-nov21-34-b-qp.webp?v=3)
Q34(c)
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Q2(b)(ii)
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Q1(b)(iii)
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Q1(f)(i)
The whole paper ↗![June 2019 Paper 2, question 1(f)(i): State the conditions that could be used to hydrolyse the polymer. [1]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/h43302-jun19-01-fi-qp.webp?v=3)
Q1(f)(ii)
The whole paper ↗![June 2019 Paper 2, question 1(f)(ii): Draw the formulae of the two organic products of hydrolysis in the boxes. [2]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/h43302-jun19-01-fii-qp.webp?v=3)
Q1(b)(i)
The whole paper ↗![June 2019 Paper 3, question 1(b)(i): Name the functional group in PLA and suggest the type of reaction that occurs when PLA biodegrades. [2]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/h43303-jun19-01-bi-qp.webp?v=3)
Q33(a)(i)
The whole paper ↗![June 2018 Paper 1, question 33(a)(i): Suggest the reagent and conditions the students used for the hydrolysis. [1]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/h43301-jun18-33-ai-qp.webp?v=3)
Q33(a)(ii)
The whole paper ↗![June 2018 Paper 1, question 33(a)(ii): Suggest how the students could obtain a sample of compound C from the solution they obtained. [2]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/h43301-jun18-33-aii-qp.webp?v=3)
Q33(a)(iii)
The whole paper ↗![June 2018 Paper 1, question 33(a)(iii): The students reacted procaine with ethanoyl chloride. Give the formula of the organic product formed. [1]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/h43301-jun18-33-aiii-qp.webp?v=3)
Q4(b)(i)
The whole paper ↗![June 2018 Paper 3, question 4(b)(i): In step 8 of the procedure the water reacts with any remaining benzoyl chloride. Write the equation for this reaction. [1]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/h43303-jun18-04-bi-qp.webp?v=3)
![June 2017 Paper 1, question 21: Which pair will not react together? A (CH3)3CCOCl and (CH3)3CNH2 B CH3COCl and CH3OH C (CH3)3N and CH3COCl D C6H5OH and (CH3)3CCOCl Your answer [1]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/h43301-jun17-21-qp.webp?v=3)
Q2(b)(iv)
The whole paper ↗![June 2017 Paper 2, question 2(b)(iv): Write an equation for the reaction in step 3. Use skeletal formulae for the organic compounds. [2]](https://pub-e8a9dbab8e2a4d089f52b2a45e0d0b50.r2.dev/bank/h43302-jun17-02-biv-qp.webp?v=3)
All 21 questions on Organic reactions, as a list
- June 2024, Paper 2, Q1(a)(ii) (3 marks): The fat molecule in Fig. 1.1 can be represented as shown below. Complete the equation for the hydrolysis of the fat with aqueous NaOH. H O H C O C R' O H C O C
- June 2024, Paper 3, Q2(c) (6 marks): ‘Oil of wintergreen’ is used by athletes to warm their muscles. It can be synthesised in the laboratory from aspirin tablets. The reaction is shown. O CH3 H3C O
- June 2023, Paper 2, Q2(c) (2 marks): The students boil some phenacetin with aqueous acid. H N O O Phenacetin Draw the structures of the two products formed in the boxes below. [2]
- June 2023, Paper 2, Q2(d) (2 marks): Compound A reacts with propanoyl chloride. Draw the skeletal formula of the organic compound formed in the box below. NH2 O Compound A [2]
- June 2022, Paper 1, Q33(e)(ii) (1 mark): Give the structural formula of the aromatic product formed in the reaction between HOC6H4COCl and CH3NH2. [1]
- June 2022, Paper 1, Q35(f) (2 marks): The skeletal formula for another local anaesthetic, lidocaine, is shown below. H N N O lidocaine Draw the skeletal formulae of the two products formed from the
- November 2021, Paper 1, Q34(b) (1 mark): The students carry out a similar reaction, as shown below. Complete the equation for their reaction. O H Cl OC2H5 N OC2H5 + + NH2 O O O compound C [1]
- November 2021, Paper 1, Q34(c) (4 marks): One of the students suggests boiling compound C with dilute HCl to carry out the hydrolysis to compound D, below. Another student says that other organic produc
- November 2021, Paper 3, Q2(b)(ii) (2 marks): There are three organic products from the alkaline hydrolysis of glutathione. The skeletal structure of one of the organic products is shown below. SH O H2N O–
- November 2020, Paper 2, Q1(b)(iii) (3 marks): A student says that acid hydrolysis of aspartame will only produce phenylalanine and one other amino acid. Comment on the accuracy of this statement, giving the
- June 2019, Paper 2, Q1(f)(i) (1 mark): State the conditions that could be used to hydrolyse the polymer. [1]
- June 2019, Paper 2, Q1(f)(ii) (2 marks): Draw the formulae of the two organic products of hydrolysis in the boxes. [2]
- June 2019, Paper 3, Q1(b)(i) (2 marks): Name the functional group in PLA and suggest the type of reaction that occurs when PLA biodegrades. [2]
- June 2018, Paper 1, Q33(a)(i) (1 mark): Suggest the reagent and conditions the students used for the hydrolysis. [1]
- June 2018, Paper 1, Q33(a)(ii) (2 marks): Suggest how the students could obtain a sample of compound C from the solution they obtained. [2]
- June 2018, Paper 1, Q33(a)(iii) (1 mark): The students reacted procaine with ethanoyl chloride. Give the formula of the organic product formed. [1]
- June 2018, Paper 3, Q4(b)(i) (1 mark): In step 8 of the procedure the water reacts with any remaining benzoyl chloride. Write the equation for this reaction. [1]
- June 2017, Paper 1, Q21 (1 mark): Which pair will not react together? A (CH3)3CCOCl and (CH3)3CNH2 B CH3COCl and CH3OH C (CH3)3N and CH3COCl D C6H5OH and (CH3)3CCOCl Your answer [1]
- June 2017, Paper 1, Q30 (1 mark): Some organic reagents are hydrolysed under either acidic or alkaline conditions. Which row(s) show(s) the correct products of the hydrolysis reactions? Reagent
- June 2017, Paper 2, Q2(b)(iv) (2 marks): Write an equation for the reaction in step 3. Use skeletal formulae for the organic compounds. [2]
- June 2017, Paper 3, Q1(d) (2 marks): The students decided to investigate carbonated drinks such as diet and regular cola. These drinks contain phosphoric acid (to increase the flavour) and aspartam
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