Copy of SCSS Prelim 2024 Chem P2 QP

SWISS COTTAGE SECONDARY SCHOOL SECONDARY FOUR PRELIMINARY EXAMINATION O Name Academic Class 4 A Form Class Index Number Form Class 4 S CHEMISTRY Paper 2 No Additional Materials are required. 6092/02 Wednesday 28 August 2024 1 hour 45 minutes READ THESE INSTRUCTIONS FIRST Write your class, index number and name 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. Write your answers in the spaces provided on the Question Paper. Section B Answer one question. Write your answers 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 / 70 Section B / 10 Total / 80 This document consists of 23 printed pages and 1 blank page. Setter: Mr Choo Shi Qian Vetter: Mr Kat Kar Sien & Mdm Tan Pui San [Turn over Home of Thoughtful Leaders: Serve with Honour, Lead with Humility

2 Section A Answer all questions. A1 Use the list of elements to answer the questions. zinc argon fluorine copper hydrogen sodium silicon carbon Each element may be used once, more than once or not at all. (a) Name the element that forms an amphoteric oxide. …………………………………………………………………………………………………........[1] (b) Name the element that can form ions with more than one oxidation state. …………………………………………………………………………………………………........[1] (c) Name the element that can form a neutral oxide. …………………………………………………………………………………………………........[1] (d) Name the element that is unreactive. …………………………………………………………………………………………………........[1] (e) Name the element that is a good oxidising agent. …………………………………………………………………………………………………........[1] (f) Name the element that forms an oxide with a giant covalent structure. …………………………………………………………………………………………………........[1] [Total: 6]

3 A2 (a) Fig. 2.1 and Fig. 2.2 show some properties of Group 17 elements, the halogens. Fig. 2.1 shows the atomic radii and Fig. 2.2 shows the electronegativity of the Group 17 elements. Electronegativity is a measure of the tendency of an atom to attract a bonding pair of electrons. It is usually measured on the Pauling scale, on which the most electronegative element (fluorine) is given an electronegativity of 4.0. (i) Use Fig. 2.1 to d escribe and explain the trend in atomic radii for halogens down the group. …………………………………………………………………………………………............ …………………………………………………………………………………………............ ….……………………………………………………………………………...………........[1] (ii)