2024 Prelims NYJC H2 Chem P1 (QP)

[Turn Over This document consists of 19 printed pages. NANYANG JUNIOR COLLEGE JC 2 Preliminary Examination Higher 2 CHEMISTRY 9729/01 Paper 1 Multiple Choice 16 Sep 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, CT and NRIC / FIN on the Answer Sheet in the spaces provided. There are thirty questions in 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. H

2 H2 Chemistry 9729/01 NYJC J2/2024 PX 1 Use of the Data Booklet is relevant to this question. Group 1, 2 and 3 metals form cations with +1, +2 and +3 oxidation states respectively. Calcium and V are adjacent elements in Group 2 of the Periodic Table. V and W are adjacent elements in the same period of the Periodic Table. The table shows the angle of deflection of cations of these elements in an electric field. element calcium V W angle of deflection +12° +5.5° +8.1° What is the proton number of W? A 11 B 13 C 37 D 39 2 Use of the Data Booklet is relevant to this question. The successive ionisation energies, in kJ mol–1, of elements G and H are given below. G 580 1820 2740 11600 14800 18400 23300 H 940 2050 2970 4140 6590 7880 14900 Which statements about elements G and H can be deduced from the data? 1 There is inter-electron repulsion in only one valence p orbital of H. 2 The 3rd ionisation energy of H is greater than the 3rd ionisation energy of G because nuclear charge of H is larger. 3 The compound formed by G and H is Al2Te3. A 1, 2 and 3 B 1 and 2 C 1 and 3 D 3 3 In which of the following pairs, is the bond angle in the first molecule larger than in the second? A NO3−, BeCl2 B BrO3−, PCl4+ C AsF6−, XeF4 D SO2, SO42−

3 H2 Chemistry 9729/01 NYJC J2/2024 PX [Turn Over 4 What is the trend in bond energy and in bond length of the carbon to hydrogen bond from C2H2 to C2H4 to C2H6? bond length bond energy A increase decrease B increase increase C decrease increase D decrease decrease 5 When hexanol is mixed with water, two distinct layers is observed. Which two intermolecular forces of attraction are best used to explain this observation? 1 instantaneous dipole - induced dipole interactions between hexanol molecules 2 hydrogen bonding between hexanol molecules 3 hy