2024 H1 Chem JC2 Prelim P1 (Q&A)_JPJC

© Jurong Pioneer Junior College [Turn over Name:____________________________________ Class:_____________ JURONG PIONEER JUNIOR COLLEGE JC2 Preliminary Examination 2024 CHEMISTRY 8873/01 Higher 1 2024 Paper 1 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, class and exam index number on the Answer Sheet in the spaces provided unless this has been done for you. There are 30 questions in this section. 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 11 printed pages and 1 blank page.

2 © Jurong Pioneer Junior College 8873/01/J2 PRELIMINARY EXAMINATION /2024 1 In two separate experiments a beam of protons and a beam of electrons, travelling at the same velocity, pass through an electric field as shown. Which statements are correct? 1 The electrons are deflected to a larger extent than the protons. 2 The electron beam is deflected in the opposite direction to the proton beam. 3 The proton beam travels in a straight path towards the negatively charged plate. A 1, 2 and 3 B 1 and 2 only C 2 and 3 only D 3 only 1 Answer: B (1 and 2 only) ✓1 Electron has the same magnitude of charge but smaller mass than proton. Since  of deflection  charge mass , electron is deflected to larger extent than proton. ✓2 The relative charge of electron is −1 while that of proton is +1. Hence, electron is deflected towards the positive plate while proton is deflected towards the negative plate. 3 Under the influence of uniform electric field, the proton beam travels in a curved path. The particle travels in straight path only when outside of electric field. 2 The 7th, 8th, 9th and 10th ionisation energies of four consecutive elements in the Periodic Table, P, Q, R and S are shown. element 7th ionisation energy / kJ mol-1 8th ionisation energy / kJ mol-1 9th ionisation energy / kJ mol-1 10th ionisation energy / kJ mol-1 P 9941 18580 21610 25180 Q 10530 12140 22480 25860 R 9520 12810 14530 26740 S 10300 11690 15280 17110 Which element has the highest first ionisation energy? A P B Q C R D S

3 © Jurong Pioneer Junior College 8873/01/J2 PRELIMINARY EXAMINATION /2024 [Turn over 2 Answer: B For each element, locate the sha