{
  "@context": "https://schema.org",
  "@type": "Book",
  "id": "pctb-chemistry-9-en",
  "board": "PCTB",
  "boardName": "Punjab",
  "boardFull": "Punjab Curriculum and Textbook Board, Lahore",
  "class": "9",
  "classSort": 9,
  "subject": "Chemistry",
  "medium": "English",
  "pages": 192,
  "sizeMB": 54,
  "textTier": "scanned",
  "producer": "3-Heights(TM) PDF Optimization Shell 5.9.1.5 (http",
  "file": "pctb-punjab/class-9/chemistry-9-en.pdf",
  "year": null,
  "acquired": "2026-08-21",
  "sha256": "05e0fcca2e1762cc8d9122546d4ff4a612f18f8f061db1a5c04f17d99315b518",
  "title": "Chemistry EM 2025-26 Class 9",
  "sourceUrl": "https://drive.google.com/uc?export=download&id=1OY1Unpm8VkLCGQfbLFrE8wLn3fzXmZpc",
  "scores": {
    "A1": 1,
    "A7": 5
  },
  "evidence": [
    {
      "id": "e01",
      "lens": "religion",
      "axis": "A1",
      "score": 1,
      "kind": "observation",
      "page": 1,
      "pageBasis": "PDF page index",
      "tier": "english-ocr",
      "text": "Bismillah · PAGE 1; one \"Allah\" token in 192 pp."
    }
  ],
  "curriculum": "SNC 2022",
  "edition": "2022-23",
  "editionNote": "Single National Curriculum 2022, Experimental Edition",
  "note": "Thirteen chapters and the sharpest curricular divergence in the corpus: Punjab adds Stoichiometry, Energetics, Equilibria, Hydrocarbons and Environmental Chemistry, plus two explicitly methodological chapters (Empirical Data Collection and Analysis; Laboratory and Practical Skills), and drops Electrochemistry, which is a full chapter in both Sindh and KP. At roughly thirteen pages a chapter it is broad and thin where KP is narrow and thick. Chapter 10, Environmental Chemistry (pp.129-144), is the densest climate treatment anywhere in the corpus. A1 is 1 - a bismillah at PAGE 1 and a single \"Allah\" token in 192 pages. A7 is 5 on absence, and cleanly so: zero female-marked tokens in 49,217 words. No other axis was assessed; the social lenses did not treat this volume.",
  "_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/pctb-chemistry-9-en/"
}