ASRJC 2024 H1Chem Prelim P1_Q&S

ASRJC JC2 Prelim 2024 8873/H1 [Turn over ANDERSON SERANGOON JUNIOR COLLEGE 2024 JC 2 PRELIMINARY EXAMINATION NAME:______________________________ ( ) CLASS: 24 / ___ CHEMISTRY 8873/01 Paper 1 Multiple Choice 17 September 2024 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 __ printed 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: 17/09/2024

2 ASRJC JC2 Prelim 2024 8873/H1 1 Use of the Data Booklet is relevant to this question. A proton and a helium nucleus both move at the same speed perpendicular to a uniform electric field. Which row describes the behaviour of the proton and the helium nucleus? A They are deflected in opposite directions. The helium nucleus is deflected most. B They are deflected in opposite directions. The proton is deflected most. C They are deflected in the same direction. The helium nucleus is deflected most. D They are deflected in the same direction. The proton is deflected most. Answer: D Proton is 1H+. Helium nucleus is 4He2+. NOT A and B Both are positively charged so they are deflected in the same direction towards the negatively charged plate. NOT C Proton (1H+) is deflected most. 1H+ 4He2+ charge mass   ratio 1 ½ Angle of deflection is proportional to charge mass ratio. Angle of deflection of 1H+ is twice that of 4He2+. 2 Which of these atomic orbitals possesses the highest relative energy? A 2pz B 3px C 3py D 4s Answer: D The 4 th quantum number possesses larger relative energies as compared to 2 nd and 3 rd quantum shells.

3 ASRJC JC2 Prelim 2024 8873/H1 [Turn Over 3 The 7th, 8th, 9th and 10th ionisation energies of an element are shown. 7th ionisation en