{
  "@context": "https://schema.org",
  "@type": "Book",
  "id": "stbb-chemistry-9-en",
  "board": "STBB",
  "boardName": "Sindh",
  "boardFull": "Sindh Textbook Board, Jamshoro",
  "class": "9",
  "classSort": 9,
  "subject": "Chemistry",
  "medium": "English",
  "pages": 187,
  "sizeMB": 82.1,
  "textTier": "scanned",
  "producer": "Adobe Acrobat Pro 11.0.0",
  "file": "stbb-sindh/class-9/chemistry-9-en.pdf",
  "year": null,
  "acquired": "2026-08-21",
  "sha256": "557f6010bdbcf37654587190e355e658dfe755b120b3afbdb15cf0f9a8e3f6ab",
  "title": "Chemistry IX (2022-23)",
  "sourceUrl": "https://portal.stbb.edu.pk/ebooks/pdf_proxy.php?id=195&download=1",
  "scores": {
    "A1": 2,
    "A7": 5
  },
  "evidence": [
    {
      "id": "e01",
      "lens": "religion",
      "axis": "A1",
      "score": 2,
      "kind": "quotation",
      "page": 5,
      "pageBasis": "PDF page index",
      "tier": "english-ocr",
      "text": "SLO \"Explain the contribution of Muslim scientists in the development of chemistry\" · PAGE 5 and a Jabir ibn Hayyan credit table · PAGE 6–7. No scripture."
    }
  ],
  "curriculum": "National Curriculum 2006",
  "edition": "portal-listed",
  "editionNote": "STBB portal edition year",
  "note": "Eight chapters — fundamentals, atomic structure, the periodic table, chemical bonding, physical states, solutions, electrochemistry, chemical reactivity — identical in title and order to KP's Chemistry 9, and convergent down to shared section headings such as §4.1 \"Why do atoms form chemical Bonds?\". This is architectural convergence on National Curriculum 2006, not copied prose. A1 2 covers a history-of-science strand and nothing devotional: the SLO \"Explain the contribution of Muslim scientists in the development of chemistry\" at PAGE 5 and a Jabir ibn Hayyan credit table at PAGE 6–7, with no scripture anywhere in the book. A7 is a 5 purely by absence — zero female-marked tokens in 42,021 words, one of only five English-medium files in the entire corpus with none at all. Two further absences a researcher should note: climate change is mentioned zero times, and there are no careers sections and no web links. A newer 2026 Urdu edition of this cell exists; the English copy held here is the 2022–23 one.",
  "_license": "CC BY 4.0 — attribute to the Textbook Evidence Project.",
  "_note": "Scores are measured properties of text, not verdicts. Read /method/ before using them.",
  "_canonical": "/books/stbb-chemistry-9-en/"
}