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Chemistry · 043 · 2026

My whole Chemistry script, all 35 pages

My worst paper, and the one with the most to learn from. Evaluated at 51.5, rounded up to 52, then moderated to 59 — the biggest jump of my five subjects. Almost every long answer here is scored in halves.

52On the script59On the marksheet · +7

Three things are covered, and nothing else

  • · The barcode number on page 1.
  • · The office-use block on the cover — the QR code and the IDEN, BAG and CHK numbers beside it.
  • · The small blue stamp the scanning centre puts on every page.

All three identify the script, not me. Every mark, tick, cross, correction and word of handwriting is untouched — covering those would defeat the purpose.

There was never a name or a roll number to remove. CBSE's own instructions, printed inside the cover and readable on page 3 below, forbid writing your roll number, name or school anywhere in your answers.

What all of this meansThe marksheet it became

Also published: Computer Science, Physics.

35 pages · 5 blank · scans, so they load as you scroll

  1. Page 1 of 35

    Answer Script Details — the question-wise marks summary for Chemistry. The one page that is real text rather than a scan.

    Chemistry answer script page 1 — Answer Script Details — the question-wise marks summary for Chemistry. The one page that is real text rather than a scan.
  2. Page 2 of 35

    The front cover. Subject, code, date and medium in my handwriting; the office-use block covered.

    Chemistry answer script page 2 — The front cover. Subject, code, date and medium in my handwriting; the office-use block covered.
  3. Page 3 of 35

    Instructions to Candidates — including the rule that forbids writing your roll number, name or school in any answer.

    Chemistry answer script page 3 — Instructions to Candidates — including the rule that forbids writing your roll number, name or school in any answer.
  4. Page 4 of 35

    The inner cover: the examiner's marks grid, the totals boxes, and the certifications.

    Chemistry answer script page 4 — The inner cover: the examiner's marks grid, the totals boxes, and the certifications.
  5. Page 5 of 35 · booklet 2Section A

    Q1–Q9, the MCQs. Two zeros already, on Q1 and Q5.

    Chemistry answer script page 5, booklet page 2 — Q1–Q9, the MCQs. Two zeros already, on Q1 and Q5.
  6. Page 6 of 35 · booklet 3

    Q10–Q16, including the assertion-and-reason pairs. Two more zeros.

    Chemistry answer script page 6, booklet page 3 — Q10–Q16, including the assertion-and-reason pairs. Two more zeros.
  7. Page 7 of 35 · booklet 4Section B

    Q17–Q19. The first red summary box: "17 : 0.5 + 0.5 + 0.5 = 1.5".

    Chemistry answer script page 7, booklet page 4 — Q17–Q19. The first red summary box: "17 : 0.5 + 0.5 + 0.5 = 1.5".
  8. Page 8 of 35 · booklet 5

    Q20 and Q21 — kinetics and amino acids.

    Chemistry answer script page 8, booklet page 5 — Q20 and Q21 — kinetics and amino acids.
  9. Page 9 of 35 · booklet 6Section C

    Q22 — SN1 versus SN2. "22a : 0.5 + 0 = 0.5".

    Chemistry answer script page 9, booklet page 6 — Q22 — SN1 versus SN2. "22a : 0.5 + 0 = 0.5".
  10. Page 10 of 35 · booklet 7

    Q22b, Q22c and the start of Q23 — racemic mixtures and the phenol conversion.

    Chemistry answer script page 10, booklet page 7 — Q22b, Q22c and the start of Q23 — racemic mixtures and the phenol conversion.
  11. Page 11 of 35 · booklet 8

    Q23 continued — Reimer–Tiemann and Friedel–Crafts.

    Chemistry answer script page 11, booklet page 8 — Q23 continued — Reimer–Tiemann and Friedel–Crafts.
  12. Page 12 of 35 · booklet 9

    Q24 — acidity of carboxylic acids. Q24b scored zero.

    Chemistry answer script page 12, booklet page 9 — Q24 — acidity of carboxylic acids. Q24b scored zero.
  13. Page 13 of 35 · booklet 10

    Q25 — anomers, invert sugar and glycosidic linkage.

    Chemistry answer script page 13, booklet page 10 — Q25 — anomers, invert sugar and glycosidic linkage.
  14. Page 14 of 35 · booklet 11

    Q26 — the first-order kinetics numerical. Full marks, and the cleanest working in the paper.

    Chemistry answer script page 14, booklet page 11 — Q26 — the first-order kinetics numerical. Full marks, and the cleanest working in the paper.
  15. Page 15 of 35 · booklet 12

    Q27b on primary cells, and the start of Q28 — elevation of boiling point.

    Chemistry answer script page 15, booklet page 12 — Q27b on primary cells, and the start of Q28 — elevation of boiling point.
  16. Page 16 of 35 · booklet 13

    Q28 concluded. "28 : 0.5 + 0.5 + 1 + 0.5 = 2.5".

    Chemistry answer script page 16, booklet page 13 — Q28 concluded. "28 : 0.5 + 0.5 + 1 + 0.5 = 2.5".
  17. Page 17 of 35 · booklet 14Section D

    Q29 — crystal field splitting, then coordination compounds. The first of several zeros on electron configurations.

    Chemistry answer script page 17, booklet page 14 — Q29 — crystal field splitting, then coordination compounds. The first of several zeros on electron configurations.
  18. Page 18 of 35 · booklet 15

    Q29 continued — the hexaammine and hexacyano complexes.

    Chemistry answer script page 18, booklet page 15 — Q29 continued — the hexaammine and hexacyano complexes.
  19. Page 19 of 35 · booklet 16

    Q30 — amine basicity, diazotisation and why aniline is acetylated before nitration.

    Chemistry answer script page 19, booklet page 16 — Q30 — amine basicity, diazotisation and why aniline is acetylated before nitration.
  20. Page 20 of 35 · booklet 17

    Q30a(ii) — the Hofmann degradation chain. Scored 0.5 of 1.

    Chemistry answer script page 20, booklet page 17 — Q30a(ii) — the Hofmann degradation chain. Scored 0.5 of 1.
  21. Page 21 of 35 · booklet 18Section E

    A false start on Section E, crossed straight out. Left in because it is what actually happened.

    Chemistry answer script page 21, booklet page 18 — A false start on Section E, crossed straight out. Left in because it is what actually happened.
  22. Page 22 of 35 · booklet 19

    Q31a — the Nernst equation done properly. Three ticks in a row.

    Chemistry answer script page 22, booklet page 19 — Q31a — the Nernst equation done properly. Three ticks in a row.
  23. Page 23 of 35 · booklet 20

    Q31a concluded at 5 of 5, and the start of Q32 on carbonyl identification.

    Chemistry answer script page 23, booklet page 20 — Q31a concluded at 5 of 5, and the start of Q32 on carbonyl identification.
  24. Page 24 of 35 · booklet 21

    Q32a(ii) — two oxidation conversions, both marked wrong.

    Chemistry answer script page 24, booklet page 21 — Q32a(ii) — two oxidation conversions, both marked wrong.
  25. Page 25 of 35 · booklet 22

    Q33 — d-block reduction potentials and the irregular trend.

    Chemistry answer script page 25, booklet page 22 — Q33 — d-block reduction potentials and the irregular trend.
  26. Page 26 of 35 · booklet 23

    Q33 continued — the copper and manganese explanations, both zero.

    Chemistry answer script page 26, booklet page 23 — Q33 continued — the copper and manganese explanations, both zero.
  27. Page 27 of 35 · booklet 24

    Q33a(ii) permanganate equations, and Q33b on lanthanoids.

    Chemistry answer script page 27, booklet page 24 — Q33a(ii) permanganate equations, and Q33b on lanthanoids.
  28. Page 28 of 35 · booklet 25

    Q33b(iv) — potassium permanganate on heating. "33b_iv : 0 + 0 = 0".

    Chemistry answer script page 28, booklet page 25 — Q33b(iv) — potassium permanganate on heating. "33b_iv : 0 + 0 = 0".
  29. Page 29 of 35 · booklet 26

    Blank, and stamped as such.

    Chemistry answer script page 29, booklet page 26 — Blank, and stamped as such.
  30. Page 30 of 35 · booklet 27

    Blank, and stamped as such.

    Chemistry answer script page 30, booklet page 27 — Blank, and stamped as such.
  31. Page 31 of 35 · booklet 28

    Blank, and stamped as such.

    Chemistry answer script page 31, booklet page 28 — Blank, and stamped as such.
  32. Page 32 of 35 · booklet 29

    Blank, and stamped as such.

    Chemistry answer script page 32, booklet page 29 — Blank, and stamped as such.
  33. Page 33 of 35 · booklet 30

    Blank, and stamped as such.

    Chemistry answer script page 33, booklet page 30 — Blank, and stamped as such.
  34. Page 34 of 35 · booklet 31

    Rough work, stamped RW.

    Chemistry answer script page 34, booklet page 31 — Rough work, stamped RW.
  35. Page 35 of 35 · booklet 32

    The densest page in any of the three scripts — every formula I could not hold in my head.

    Chemistry answer script page 35, booklet page 32 — The densest page in any of the three scripts — every formula I could not hold in my head.

That's the whole document. If you spot something in it I've described wrongly anywhere else on this site, tell me — dpsgnotes@gmail.com.