2025 CHIJ SEC (TP) Chemistry Prelim Paper 2 QP

O CONVENT OF THE HOLY INFANT JESUS SECONDARY Preliminary Examination in preparation for the General Certificate of Education Ordinary Level 2025 CANDIDATE NAME CLASS REGISTER NUMBER CHEMISTRY Paper 2 Candidates answer on the Question Paper. No Additional Materials are required. 6092/02 28 August 2025 1 hour 45 minutes READ THESE INSTRUCTIONS FIRST Write your name, class and register number on all the work you hand in. Write in dark blue or black pen. You may use an HB pencil for any diagrams or graphs. Do not use staples, paper clips, glue or correction fluid. Section A Answer all questions. Write your answers in the spaces provided. Section B Answer one question. Write your answers in the spaces provided. The number of marks is given in brackets [ ] at the end of each question or part question. A copy of the Periodic Table is printed on page 24. The use of an approved scientific calculator is expected, where appropriate. This document consists of 24 printed pages. [Turn over

2 CHIJSec/2025/OLevelPrelim/6092/02 Section A Answer all questions. 1 Fig. 1.1 shows some elements in the Periodic Table. H Li F Mg Ar Zn Br Ag Fig. 1.1 Use the symbols from the table to identify the following elements. Each element may be used once, more than once or not at all. (a) This element forms an amphoteric oxide. ……………………………………………………………...………………………………..….. [1] (b) This element has a melting point below room temperature but a boiling point above room temperature. ……………………………………………………………...………………………………..….. [1] (c) This is the least reactive element in its group. ……………………………………………………………...………………………………..….. [1] (d) This element is used to provide an inert environment in industrial reactions. ……………………………………………………………...………………………………..….. [1] (e) This element forms coloured compounds. ……………………………………………………………...………………………………..….. [1] [Total: 5]

3 CHIJSec/2025/OLevelPrelim/6092/02 [Turn over 2 Chromatography can be used to separate and identify components of a mixture. Synthetic dyes are examples of mixtures that can be separated using paper chromatography. A student wanted to find out whether a sample of black dye is pure. She carried out the following procedure: Step 1: A start line was drawn using a pencil, on a sheet of chromatography paper. Step 2: She placed spots of known dyes, A, B, C, D and E and the black dye on the start line. Step 3: The chromatography was allowed to run using ethanol as a solvent. Fig. 2.1 shows the results of the experiment. Fig. 2.1 (a) Using the results of the chromatography in Fig . 2.1, explain whether the sample of black dye is pure. …………………………………………………….……….……………………………………….. ……………………………………………………………...………………………………..….. [1