2025 CHIJ SEC (TP) Chemistry Prelim Paper 1 QP

CHIJSec/2025/OLevelPrelim/6092/01 [Turn over 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 1 Multiple Choice Additional Materials: Multiple Choice Answer Sheet 6092/01 29 August 2025 1 hour READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, glue or correction fluid. Write your name, class and register number on the Multiple Choice Answer Sheet provided. There are forty questions on this paper. Answer all questions. For each question, there are four possible answers A, B, C and D. Choose the one you consider correct and record your choice in soft pencil on the separate Answer Sheet. Read the instructions on the Answer Sheet very carefully. Each correct answer will score one mark. A mark will not be deducted for a wrong answer. Any rough working should be done on the question paper. A copy of the Periodic Table is printed on page 16. The use of an approved scientific calculator is expected, where appropriate. This document consists of 16 printed pages.

2 CHIJSec/2025/OLevelPrelim/6092/01 1 An experiment is done to determine the rate of decomposition of hydrogen peroxide. 2H2O2(aq) → 2H2O(l) + O2(g) Which pieces of apparatus are needed for this experiment? A conical flask, gas syringe, stopwatch B conical flask, gas syringe, thermometer C conical flask, stopwatch, thermometer D gas syringe, stopwatch, thermometer 2 The diagram shows a set-up used to separate two substances in a mixture. Which mixtures can be separated using this set-up? A ammonium chloride and iodine B ammonium chloride and sodium chloride C copper(II) sulfate and sodium carbonate D lead(II) chloride and potassium chloride filter funnel evaporating dish mixture heat

3 [Turn over CHIJSec/2025/OLevelPrelim/6092/01 3 The apparatus shown in the diagram was set up. Which row correctly shows the pair of gases that will cause the water level at U to rise? gas 1 gas 2 A carbon dioxide nitrogen B methane sulfur dioxide C nitrogen carbon monoxide D sulfur dioxide methane 4 An atom of one isotope of chlorine is represented by the symbol Cl37 . Particle R has one more neutron, two more protons and one more electron than this isotope of chlorine. Which symbol represents R? A Cl38 + B Cl38 − C K39 D K40 + 5 Which diagram best represents a mixture of neon and hydrogen bromide? air air gas 2 gas 1 porous pot porous pot beaker water A B C D

4 CHIJSec/2025/OLevelPrelim/6092/01 6 Elements X and Y react to form an ionic compound of formula XY2. Which r