CHIJ_2024 Sec 4E5N Prelim Sc(Chem) P1

O CONVENT OF THE HOLY INFANT JESUS SECONDARY Preliminary Examination in preparation for the General Certificate of Education Ordinary Level 2024 CANDIDATE NAME CLASS REGISTER NUMBER SCIENCE (CHEMISTRY, BIOLOGY) Paper 1 Multiple Choice Additional Materials: Multiple Choice Answer Sheet 5088/01 28 August 2024 1 hour READ THESE INSTRUCTIONS FIRST Write in soft pencil. Write your name, class and register number on the Answer Sheet in the spaces provided unless this has been done for you. Do not use staples, paper clips, glue, correction fluid or correction tape. 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 in this booklet. A copy of the Data Sheet is printed on page 23. 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 21 printed pages and 3 blank pages. [Turn over

2 CHIJSec/2024/OLevelPrelim/5088/01 1 A gas has the following properties. • less dense than air • insoluble in water Which method cannot be used to collect the gas? A B C D 2 A sample of iodine crystals is at room temperature and pressure. Which statement about the particles in the sample is correct? A The particles are arranged in a giant lattice. B The particles do not have kinetic energy. C The particles move randomly through the solid. D The particles vibrate about a fixed point.

3 [Turn over CHIJSec/2024/OLevelPrelim/5088/01 3 The apparatus shown is used to distil a dilute solution of ethanol in water. The boiling point of ethanol is 78 °C and the boiling point of water is 100 °C. Which graph shows the change in concentration of the ethanol in the boiling flask as the distillation proceeds? A B C D water out water in thermometer fractionating column boiling flask mixture of ethanol and water

4 CHIJSec/2024/OLevelPrelim/5088/01 4 The ion X2+ has three complete shells of electrons. What is X? A calcium B magnesium C potassium D strontium 5 A crystal of sodium chloride is held together by A covalent bonds. B positive ions in a ‘sea of electrons’. C the attraction of oppositely charged ions. D shared pairs of electrons. 6 Some students wrote three statements about the bonding in a molecule of carbon dioxide, CO2. 1 A carbon atom has 4 outer electrons so all outer electrons are involved in bonding. 2 A carbon atom has 6 outer electrons so 2 outer electrons are not invol