YIJC 2023 H2 Chem Prelim P1 QP (1)

©YIJC [Turn over YISHUN INNOVA JUNIOR COLLEGE JC 2 PRELIMINARY EXAMINATION Higher 2 CANDIDATE NAME CG INDEX NO CHEMISTRY Paper 1 Multiple Choice Additional Materials: Multiple Choice Answer Sheet Data Booklet 9729/01 15 September 2023 1 hour READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, highlighters, glue or correction fluid/tape. Write your name and class on the Answer Sheet in the spaces provided unless this has been done for you. 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 16 printed pages.

©YIJC [Turn over 2 1 A medal has a total surface area of 150 cm2. It is evenly coated with silver by electrolysis. Its mass increases by 0.216 g. How many atoms of silver are deposited per cm2 on the surface of the medal? A 8.0 x 1018 B 1.8 x 1019 C 8.7 x 1020 D 1.2 x 1021 2 Which gas would behave most like an ideal gas under room conditions? A ammonia B helium C krypton D nitrogen 3 In two separate experiments a beam of protons and a beam of He2+ 2 4 particles, travelling at the same velocity, pass through an electric field as shown. Which statements are correct? 1 Both beams are deflected in the same direction. 2 The proton beam travels in a straight path towards the negatively charged plate. 3 The protons are deflected to a larger extent than the He2+ 2 4 particles. A 1 and 2 B 1 and 3 C 2 and 3 D 1 only

©YIJC [Turn over 3 4 The table shows some properties of four substances. Which substance could be potassium iodide? Melting point of solid / °C Electrical conductivity when molten A −66 poor B −39 good C 680 good D 1600 poor 5 A carbon monoxide molecule, CO, has three bonds between the carbon atom and the oxygen atom. Which features are present in one CO molecule? 1 Three lone pairs of electrons 2 A co-ordinate bond from oxygen to carbon 3 Two  bonds A 1 and 2 B 2 and 3 C 1 and 3 D 1, 2 and 3

©YIJC [Turn over 4 6 The reaction of manganate(VII) ions with ethanedioate ions in acid solution may be represented by the following equation. 2MnO4–(aq) + 16H+(aq) + 5C2O42–(aq) → 2Mn2+(aq) + 8H2O(l) + 10CO2(g) The graph shows concentration of manganate(VII) ions against t