The 2024 G.C.E. (A/L) Chemistry Paper II set by the Department of Examinations, Sri Lanka. Part A: answer all four structured questions on the paper itself (100 marks each). Parts B and C: answer four essay questions, two from each part (150 marks each). The gas constant R = 8.314 J K⁻¹ mol⁻¹. Answers and marks follow the official marking scheme. The Sinhala text here is from the Sinhala-medium paper.