VJC 2022 H2 Chem Prelim P1_qp_

© VJC 2022 9729/01/PRELIM/22 [Turn over VICTORIA JUNIOR COLLEGE JC 2 PRELIMINARY EXAMINATION Higher 2 CHEMISTRY 9729/01 Paper 1 Multiple Choice 22 September 2022 1 hour Additional Materials: Multiple Choice Answer Sheet Data Booklet READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, highlighters, glue or correction fluid. Write your name, CT group and exam number on the Answer Sheet in the spaces provided unless this has been done for you. DO NOT WRITE IN ANY BARCODES. 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 choices in soft pencil on the separate Answer Sheet. Read the instructions on the Answer Sheet very carefully. Each correct answer will score one mark. No mark will 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 14 printed pages.

2 © VJC 2022 9729/01/PRELIM/22 For each question there are four possible answers, A, B, C, and D. Choose the one you consider to be correct. 1 Use of the Data Booklet is relevant to this question. A compound is made from two elements, X and Y. Each separate atom of X and of Y has exactly one unpaired electron in their ground states. What could the compound be? 1 Al2O3 2 BH3 3 CuI 4 FeCl3 A 1 and 2 only B 2 and 3 only C 2 and 4 only D 3 and 4 only 2 The following graph shows the second ionisation energies of eight consecutive elements J to R, which have atomic numbers between 3 to 20 in the Periodic Table. Which one of the following statements about the elements is false? A L does not form an oxide. B Q has the highest melting point. C The atomic radius of J is larger than the atomic radius of K. D The oxide of N has a lower melting point than the oxide of R. atomic number 2nd ionisation energy / kJ mol−1

3 © VJC 2022 9729/01/PRELIM/22 [Turn over 3 Which one of the following pairs of molecules has the same bond angle about the central atom? A SO2 and OF2 B OCS and HCN C CCl4 and XeF4 D CS2 and H2S 4 Two allotropes of carbon are shown below. graphene carbon nanotube Similar to graphite, graphene and carbon nanotubes consist of rings of six covalently bonded carbon atoms. Unlike graphite, graphene is made up of only a single layer of carbon atoms. Which of the fol