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AS & A Level Chemistry 9701 · Topic 34

Nitrogen compounds: past paper questions

17 real questionsasked in 1 of the last 10 exam series2019–2025usually: Draw, Define, Predict

Real questions on nitrogen compounds

The newest 17 of 17 written questions. Open one to see it on the real paper.

  1. 9701/23 · October/November 2025 · Q4b(ii)[2]

    Define stereoisomerism.

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  2. 9701/23 · October/November 2025 · Q4b(iii)[3]

    Draw a section of poly(propene), showing two repeat units. Use your diagram to identify the type of stereoisomerism shown by poly(propene). Explain your answer. section of poly(propene)

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  3. 9701/43 · October/November 2022 · Q7b(iii)[3]

    Compare the relative basicities of compound P, compound Q and phenylamine. < < least basic most basic Explain your answer. 

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  4. 9701/41 · October/November 2021 · Q10a[1]

    Draw the structure of valine at pH 6.0. 

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  5. 9701/41 · October/November 2021 · Q10b[3]

    A solution of lysine is produced with pH 9.7. Dilute sulfuric acid is added slowly until the pH of the solution is 1.0. The sulfuric acid reacts with lysine to produce different organic ions that are not present in significant concentrations at pH 9.7. Draw the structures of three of the organic ions that form during...

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  6. 9701/43 · May/June 2021 · Q7b(i)[3]

    Draw the structures of the two structural isomers with the molecular formula C 6 H 12 N 2 O 5 that could be present in the product mixture. The functional group formed in each case should be displayed.

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  7. 9701/43 · May/June 2021 · Q7b(ii)[1]

    Predict the number of different structural isomers with the molecular formula C 9 H 19 N 3 O 4 that could be present in the product mixture. molecular formula number of structural isomers formed C 9 H 19 N 3 O 4

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  8. 9701/42 · February/March 2021 · Q7a(iii)[1]

    Proline is able to form a poly(proline) peptide chain. A section of a poly(proline) chain is shown. N N O N O O Suggest why the secondary structure of poly(proline) cannot be stabilised by hydrogen bonding.

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  9. 9701/42 · February/March 2021 · Q7b(i)[1]

    Write an equation for the reaction of proline with NaOH(aq) in reaction 1. C 4 H 7 NHCO 2 H + �����������������������������������������������������������������������������������������������������������

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  10. 9701/22 · October/November 2020 · Q3c(ii)[2]

    T exhibits optical isomerism. Explain what is meant by the term optical isomer and circle any atom(s) in T that give rise to optical isomerism. T Cl Cl 

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  11. 9701/41 · October/November 2020 · Q10b(ii)[2]

    2‑aminopropanoic acid, CH 3 CH(NH 2 )CO 2 H, exists as two stereoisomers. Draw three-dimensional diagrams to show the two stereoisomers of 2‑aminopropanoic acid. State the type of stereoisomerism shown. type of stereoisomerism 

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  12. 9701/42 · May/June 2020 · Q6e(i)[2]

    Draw the structures of the two other organic products formed. 

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  13. 9701/42 · May/June 2020 · Q6e(ii)[1]

    Using the 3-letter abbreviations for the amino acids as given in the Data Booklet, complete the sequence for the cyclic peptide, B. Thr 

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  14. 9701/41 · October/November 2019 · Q8a(i)[1]

    Describe the conditions that could be used to hydrolyse E to produce a mixture of three amino acids.

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  15. 9701/41 · October/November 2019 · Q8a(ii)[2]

    Draw the structures of the three amino acids produced by this hydrolysis reaction. The three amino acids should be shown in the correct form for the conditions you have chosen in (a)(i). 

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  16. 9701/43 · October/November 2019 · Q8a(i)[1]

    Describe the conditions that could be used to hydrolyse E to produce a mixture of three amino acids.

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  17. 9701/43 · October/November 2019 · Q8a(ii)[2]

    Draw the structures of the three amino acids produced by this hydrolysis reaction. The three amino acids should be shown in the correct form for the conditions you have chosen in (a)(i). 

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What examiners said

Many candidates found this challenging. Answers were often not sufficiently detailed. For each substance a clear statement linked to the ability of the lone pair of electrons on the N to accept a proton was required. Many candidates recognised that the alkyl group is an electron donating group and the lone pair on the N of NH2 is delocalised into the benzene ring. However, the relatively low basic...

— Examiner report, October/November 2022, 9701/43 Q7(b)(iii) (Cambridge)

Most candidates gave the correct structure of the zwitterion.

— Examiner report, October/November 2021, 9701/41 Q10(a) (Cambridge)

Most candidates found this challenging. Candidates had to deduce that ions A and B had a net single positive charge and C a 2+ charge. Some incorrectly suggested that A was the zwitterion of lysine and that B had a net single negative charge.

— Examiner report, October/November 2021, 9701/41 Q10(b) (Cambridge)

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Nitrogen compounds — AS & A Level Chemistry 9701 past paper questions | AssessPro