Chemistry, class 9

Sindh and KP run the same eight-chapter book — fundamentals of chemistry, atomic structure, periodic table and periodicity, chemical bonding, physical states of matter, solutions, electrochemistry, chemical reactivity — identical in title and order, and convergent below title level: §4.1 in both is "Why do atoms form chemical Bonds?", §6.1 in both is the solution/solute/solvent section. That is architectural convergence on National Curriculum 2006 rather than copied prose, and it is the strongest same-book finding in the sciences. Punjab's thirteen-chapter SNC-2022 volume is the sharpest curricular divergence in the whole corpus: it adds Stoichiometry, Energetics, Equilibria, Hydrocarbons and Environmental Chemistry, plus two frankly methodological chapters (Empirical Data Collection and Analysis; Laboratory and Practical Skills), and drops Electrochemistry, which is a full chapter in both other boards. The cost is depth — roughly thirteen pages per chapter in Punjab against about thirty per unit in KP. Punjab scores A1 1: a bismillah at p.1 and a single "Allah" token in 192 pages. Sindh and KP both score 2, and the 2 is history of science, not scripture — Sindh's learning outcome "Explain the contribution of Muslim scientists in the development of chemistry" (p.5) and its Jabir ibn Hayyan credit table (pp.6–7); KP's pp.6–8 on the "Muslim Period 600 - 1600 AD", "the period of 'Al - Chemists'". Neither contains a Quranic verse. Currency splits the same way as chapter architecture: Punjab's Environmental Chemistry chapter (pp.129–144) is the densest climate treatment in the corpus, while Sindh Chemistry 9 and KP Chemistry 9 mention climate change zero times. All three score A7 5. KP's is the instructive one: the corpus's only named woman scientist sits here, as the answer to a puzzle about why curium's symbol is Cm rather than C, Cu or Cr. In Pakistan's most-shared chemistry syllabus, Marie Curie appears once — as a spelling clue, never as a scientist who did something.