2022 HYSS Chem Prelims P2

Name Index Number Class HUA YI SECONDARY SCHOOL Preliminary Examination 2022 CHEMISTRY 6092/2 Paper 2 23 August 2022 1 hour 45 minutes Candidates answer on the Question Paper. No Additional Materials are required. READ THESE INSTRUCTIONS FIRST Write your Name, Index Number and Class on all the work you hand in. Write in dark blue or black pen. You may use a pencil for any diagrams, graphs, tables or rough working. Do not use staples, paper clips, highlighters, glue or correction fluid. Section A Answer all questions. Write your answers in the spaces provided on the question paper. Section B Answer all three questions, the last question is in the form of either/or. Answer all the questions in the spaces provided on the question paper. The number of marks is given in brackets [ ] at the end of each question or part question. A copy of the Periodic Table is printed on page 24. The use of an approved scientific calculator is expected, where appropriate. For Examiner’s Use Section A Section B B7 B8 B9 Total This document consists of 24 printed pages including the cover page. © HYSS 2022 No part of this document may be reproduced in any form or transmitted in any form or by any means without the prior permission of Hua Yi Secondary School. [Turn Over] Setter: Ms Keziah Seow 4E 4E

4E Chemistry P2 Preliminary Exam 2022 Hua Yi Secondary School 2 Section A Answer all the questions in this section in the spaces provided. The total mark for this section is 50. A1 The symbols of the elements of Period 3 of the Periodic Table are shown. Na Mg Al Si P S Cl Ar Answer the following questions about these elements. (a) Write the symbol of an element which (i) forms an amphoteric oxide, ………………………………………………………………………………………………. [1] (ii) exists as diatomic molecules, ………………………………………………………………………………………………. [1] (iii) shows both metallic and non-metallic character, ………………………………………………………………………………………………. [1] (iv) is used to fill light bulbs, ………………………………………………………………………………………………. [1] (v) can conduct electricity in solid state and floats on water. ………………………………………………………………………………………………. [1] (b) The oxides of sulfur and silicon have very different melting points. Explain how and why the melting points of sulfur dioxide and silicon dioxide are different. ……………………………………………………………………………………………………… ………………………………………………………………………………………………………