Overview / Database / Chemistry 10
Chemistry 10 (PECTAA 2026)
Punjab Curriculum and Textbook Board, Lahore
Bibliographic record
| Board | Punjab Curriculum and Textbook Board, Lahore |
|---|---|
| Class | 10 |
| Subject | Chemistry |
| Medium | English |
| Curriculum | PECTAA 2026 |
| Edition | 2026 |
| Approval | Publisher edition string 'PECTAA 2026' |
| Pages | 168 |
| File size | 20.5 MB |
| PDF producer | Corel PDF Engine Version 26.1.0.143 |
Evidence tier
native Machine-readable text — supports direct quotation.
Measured scores
Axes not listed were not scored for this book — coverage is uneven by design. All axes run 1–5, where 1 is the secular/pluralist/open pole. See the method.
Evidence recorded 2
Three kinds, deliberately styled apart. A quotation is verbatim wording and is only ever taken from English-medium text. An observation describes structure or theme — the only kind permitted for Urdu and Sindhi material, which this project never quotes. An absence is a negative result: a probe was run and returned nothing, which is the weakest claim made anywhere on this site.
absence gender lens A7 = 5 native text #e02
A negative result. It records that a probe was run and found nothing — not that the thing is not in the book. Where this rests on Urdu material the correct reading is not established, never absent, because degraded Nastaliq OCR cannot tell those apart.
Every passage recorded for this book is shown above — nothing is withheld or truncated. Each item has a permanent anchor, so a single piece of evidence can be linked and disputed on its own.
Availability of the book itself
Download this book (PDF, 20.5 MB)
Published by Punjab Curriculum and Textbook Board, Lahore, which holds copyright in it. Served here unmodified, without charge and without advertising, to preserve public access to material its publisher distributes free — source links rot and editions are withdrawn, and several in this catalogue already have. This is an archival mirror, not a licence granted by the Board. The Board may have it removed at any time, for any reason, and the removal will be recorded publicly. Verify your copy against the SHA-256 below.
Provenance
| Local file | pctb-punjab/class-10/chemistry-10-en.pdf |
|---|---|
| Copy retrieved | |
| SHA-256 of the analysed file | 64fcd73190ad12858ff756a2fcfde6cdf8f108cc0b318d55999554cf4f53aed6 |
| Source | https://drive.usercontent.google.com/download?export=download&confirm=t&id=142r9HIosiPteAb2BvlcqSxuOTx9KYqSr |
The checksum is of the exact file these findings were computed from, so anyone can prove they hold the same bytes. The retrieval date is when this copy was fetched to the project's own disk, not a formal web-archive capture. Boards and mirrors reprint and reorganise continuously, so a source link may not resolve, and may not serve the same edition if it does. The bibliographic record above — board, class, subject, medium, curriculum, edition, approval reference and page count — is what identifies the book; the link is a convenience. This project does not republish the PDF itself, for the copyright reasons set out in about.
Identifiers and permanent link
| Record ID | pctb-chemistry-10-en |
|---|---|
| Permanent link | /books/pctb-chemistry-10-en/ |
| This record as data | /books/pctb-chemistry-10-en.json · whole dataset |
The record ID is an accession number that happens to be readable. It never changes, even if the metadata encoded in it turns out to be wrong — if this book's board, class, subject or medium is corrected, the correction appears in the fields above and the ID stays as it is. That is the only way a link made today still resolves in ten years. The full rule is in the standards.
Cite this record
pctb-chemistry-10-en, corpus version 210 records. Retrieved from /books/pctb-chemistry-10-en/If you are quoting a passage from the book rather than citing this record, cite the book — the bibliographic details above are what identifies it — and say that you found it here. Two citations, not one.
Challenge this record
If the edition is misidentified, a score does not survive its evidence, the source link is wrong, or a passage is unfairly characterised, that is worth reporting and will be acted on whether or not the correction suits the argument. Corrections are published in the corrections log, never quietly patched. This applies fully to the board that publishes this book: any reply will appear beside the finding it concerns, under the right of reply.