2025 AES 5086 5088 Sc(Chem) Prelim P1 QP

Name: …………………………………………. ( ) Class: ………………….. [Turn over ASSUMPTION ENGLISH SCHOOL PRELIMINARY EXAMINATION 2025 SCIENCE (CHEMISTRY) 5086 / 01 5088 / 01 ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL ASSUMPTION ENGLISH SCHOOL LEVEL: Sec 4 Express / Sec 5 Normal (Academic) DATE : 3 September 2025 CLASS(ES): Sec 4/2, 4/3, 4/5 SBB, 5/1 DURATION : 1 hour (for both Science components) Additional Materials Provided: 1 sheet of OAS paper INSTRUCTIONS TO CANDIDATES Do not open this booklet until you are told to do so. Write your NAME , CLASS and INDEX NUMBER at the top of this page and on the OAS paper. Shade your index number on the OAS paper. There are 20 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 OAS paper. A copy of the Data Sheet is printed on page 9. A copy of the Periodic Table is printed on page 10. The use of an approved scientific calculator is expected, where appropriate. For Examiner’s use: Paper 1 / 20 This question paper consists of 10 printed pages including this page.

2 5086/5088/01/4E/5N/PRELIM/25 SECTION A: MULTIPLE CHOICE QUESTIONS [20 MARKS] There are 20 questions in this section. Answer ALL questions. Choose the correct answer and record your choice on the OAS paper provided. 1 The diagrams show three sets of apparatus. 1 2 3 Which apparatus would be used to obtain separate dry samples of sand and salt from a mixture of sand and seawater? A 1 only B 3 only C 1 and 3 D 2 and 3 2 Gas Y is less dense than air, soluble in water and forms an alkaline solution. Which method is used to collect a sample of the gas? A B C D evaporating dish heat heat beaker filter funnel filter paper

3 5086/5088/01/4E/5N/PRELIM/25 4 W, X, Y and Z are elements in the same period of the Periodic Table. The letters are not the chemical symbols of the elements. Some information about the elements is shown below. W has an electronic configuration of 2,1. X loses 1 electron when it reacts. Y has an electron configuration of 2,6. Z gains 1 electron when it reacts. Which elements are metal? A W and X B W and Z C X and Y D Y and Z 5 What is the total numbe