2022 FHSS Chem Prelims P2

Candidate Name: Class Index No. FUHUA SECONDARY SCHOOL 4E Secondary Four Express Preliminary Examination 2022 Fuhua Secondary Fuhua Secondary Fuhua Secondary Fuhua Secondary Fuhua Secondary Fuhua Secondary Fuhua Secondary Fuhua Secondary Fuhua Secondary Fuhua Secondary Fuhua Secondary Fuhua Secondary Fuhua Secondary Fuhua Secondary Fuhua Secondary Fuhua Secondary Fuhua Seconda ry Fuhua Secondary Fuhua Secondary Fuhua Secondary F uhua Secondary Fuhua Secondary Fuhua Secondary Fuhua Secondary Fuhua Secondary Fuhua Secondary Fuhua Secondary Fuhua Secondary Fuhua Secondary Fuhua Secondary Fuhua Secondary Fuhua Secondary Fuhua Secondary Fuhua Secondary Fuhua Seconda ry Fuhua S econdary ____________________________________________________________________________________________________________ CHEMISTRY 6092/02 Paper 2 23 August 2022 1040 – 1225 1 hour 45 minutes ____________________________________________________________________________________________________________ READ THESE INSTRUCTIONS FIRST Write your name, class and index number on all the work you hand in. Write in dark blue or black pen. You may use an HB pencil for any diagrams or graphs. Do not use staples, paper clips, glue or correction fluid. Section A Answer all questions in the spaces provided. Section B Answer all three questions, the last question is in the form of either/or. Answer all questions in the spaces provided. 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 20. The use of an approved scientific calculator is expected, where appropriate. PARENT’S SIGNATURE FOR EXAMINER’S USE Section A Section B Total /50 /30 /80 Setter: Mdm Hia Soo Ching Vetters: Mr Elton Tan, Ms Veron Lee, Ms Nur Hanis & Ms Choo Hui En This document consists of 20 printed pages.

2 Section A Answer all questions in this section in the spaces provided. The total mark for this section is 50. A1 The diagram below shows part of the Periodic Table. Answer the following questions using only the elements shown in the diagram above. Each element can be used once, more than once or not at all. (a) Which two elements react together to give the most vigorous reaction? [1] (b) (i) Which two elements in Period 3 form an ionic compound with a formula of the type Y2Z? [1] (ii) Draw a dot and cross diagram to represent the bonding in Y2Z. Show only outer electrons. [2] (c) Which elements react with oxygen to give an oxide that dissolves in both aqueous sodium hydroxide and dilute hydrochloric acid? [1] (d) Describe the trends in melting point and reactivity for Group I and Group VII. [2] (e) Construct a balanced chemical equation when