2025 ASRJC Prelim H1Chem P1_QP

ASRJC JC2 Prelim 2025 8873/H1 [Turn over ANDERSON SERANGOON JUNIOR COLLEGE 2025 JC 2 PRELIMINARY EXAMINATION NAME:______________________________ ( ) CLASS: 25 / ___ CHEMISTRY 8873/01 Paper 1 Multiple Choice 2 September 2025 1 hour Additional Materials: Multiple choice Answer Sheet Data Booklet READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, glue or correction fluid. Write your name and class on the Answer Sheet in the spaces provided. There are thirty 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. The use of an approved scientific calculator is expected, where appropriate. This document consists of 14 printed pages and 2 blank pages. Multiple Choice Answer Sheet Write your name, class and NRIC / FIN number, including the reference letter. Shade the NRIC / FIN number. Exam Title: JC2 Preliminary Exam Exam Details: H1 Chemistry / Paper 1 Date: 02/09/2025

2 ASRJC JC2 Prelim 2025 8873/H1 1 Use of the Data Booklet is relevant to this question. L is the Avogadro constant. Which statement is correct? A 71.0 g of chlorine gas contains 2 L molecules. B 1.00 mol of sodium sulfate contains 3 L ions. C 6.9 g of lithium ion, Li+, contains 3 L electrons. D 48 dm3 of hydrogen gas, measured at r.t.p, contains 2 L atoms. 2 Use of the Data Booklet is relevant to this question. Iodine-131 is radioactive and is used in thyroid cancer treatment. Which statements about this element are correct? 1 There are p electrons present in 5 quantum shells. 2 There are 78 neutrons, 53 protons and 54 electrons in the negative ion of 131 53I . 3 All electrons in the negative ion of 131 53I are paired. A 1, 2 and 3 B 2 and 3 only C 1 and 3 only D 2 only

3 ASRJC JC2 Prelim 2025 8873/H1 [Turn Over 3 The first seven ionisation energies of an element Y are shown in the sketch graph. What could be the identity of element Y? A Bromine B Carbon C Phosphorus D Silicon

4 ASRJC JC2 Prelim 2025 8873/H1 4 A beam of particles contains He4 2+ and 𝑒−0 ions. All particles approach an electric field at the same speed. Which diagram indicates the deflection of these particles as they pass through the electric field? A B