2022 JPJC Prelim P1 Question Paper and answer

© Jurong Pioneer Junior College [Turn Over NAME CLASS 21S JURONG PIONEER JUNIOR COLLEGE JC2 PRELIMINARY EXAMINATION 2022 CHEMISTRY 9729/01 Higher 2 Paper 1 Multiple Choice 22 September 2022 1 hour Candidates answer on separate paper. 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 thirty questions on this paper. Answer all questions. For each question there are four possible answers A, B, C or 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 13 printed pages.

2 © Jurong Pioneer Junior College 9729/01/J2 PRELIMINARY EXAM/2022 1 Use of the Data Booklet is relevant to this question. The table shows the forth, fifth, sixth, seventh , eighth and ninth ionisation energies of an element. Which element has these ionisation energies values? 4th 5th 6th 7th 8th 9th Ionisation Energy / kJ mol−1 5900 7100 8700 11000 13500 42000 A Si B P C Cl D Ar 2 Ethanedioate ions, C2O42–, are oxidised by hot acidified, aqueous potassium manganate( VII) according to the following equation. 2MnO4–(aq) + 5C2O42–(aq) + 16H+(aq) → 2Mn2+(aq) + 10CO2(g) + 8H2O(l) What volume of 0.020 mol dm –3 potassium manganate(VII) is required to oxidise completely 1.0 x 10–3 mol of the salt K2C2O4? A 20 cm3 B 40 cm3 C 50 cm3 D 125 cm3 3 Propanone and dichloromethane are common organic solvents used in the laboratory. Propanone is soluble in water but dichloromethane is not. Which of the following statements best accounts for this? A Propanone is a polar molecule but dichloromethane is non-polar. B A hydrogen bond forms between the hydrogen in propanone and the oxygen of a water molecule. C A hydrogen bond forms between the oxygen in propanone and the hydrogen of a water molecule. D Propanone has a smaller relative molecular mass than dichloromethane. propanone dichloromethane

3 © Jurong Pioneer Junior College 9729/01/J2 PRELIMINARY EXAM/2022 [Turn Over 4 Nitrogen oxides (NOx) can be formed from the reaction of nitrogen with oxygen in car engines. It can dissolve in water to form nitric acid which causes acid rain. Which of the following statements are correct? 1 N atom in NO3− is sp2 hybridised. 2 NO and NO2 contain an unpaired electron. 3 NO and NO2 have n