The 2022 G.C.E. (A/L) Chemistry Paper I, held in early 2023 by the Department of Examinations, Sri Lanka: 50 multiple-choice questions in two hours, no calculators. R = 8.314 J K⁻¹ mol⁻¹, Nₐ = 6.022 × 10²³ mol⁻¹, h = 6.626 × 10⁻³⁴ J s, c = 3 × 10⁸ m s⁻¹. In questions 31–40 choose (1) if only (a) and (b) are correct, (2) if only (b) and (c), (3) if only (c) and (d), (4) if only (d) and (a), and (5) for any other number or combination of correct responses. Questions 41–50 give two statements: (1) both true and the second correctly explains the first, (2) both true but the second does not explain the first, (3) first true, second false, (4) first false, second true, (5) both false. Answers are from the official marking scheme, which gives a single answer to every question. Figures are shown exactly as printed. Each question links to the lesson it tests.