2019 JPJC Prelim H2 Chem P2 QP

 Jurong Pioneer Junior College [Turn Over NAME CLASS 18S JURONG PIONEER JUNIOR COLLEGE JC2 PRELIMINARY EXAMINATION 2019 CHEMISTRY 9729/02 Higher 2 Paper 2 Structured Questions 17 September 2019 2 hours Candidates answer on the Question Paper. Additional Materials: Data Booklet READ THESE INSTRUCTIONS FIRST Write your name, class and exam index number on all the work you hand in. Write in dark blue or black pen on both sides of the paper. You may use a HB pencil for any diagrams, graphs. Do not use staples, paper clips, glue or correction fluid. Answer all questions in the spaces provided on the Question Paper. The use of an approved scientific calculator is expected, where appropriate. A Data Booklet is provided. At the end of the examination, fasten all your work securely together. The number of marks is given in brackets [ ] at the end of each question or part question. For Examiner’s Use 1 17 2 17 3 19 4 22 Penalty (delete accordingly) Bond linkages –1 / NA Total 75 This document consists of 18 printed pages.

2  Jurong Pioneer Junior College 9729/02/J2 PRELIMINARY EXAM/2019 Answer all the questions. 1 Copper, a transition element, and iodine , a Group 17 halogen, are both shiny crystalline solids. The crystal structures of copper and iodine are both face centred cubic. Figure 1.1 shows the arrangement of the particles in this type of crystal lattice. Figure 1.1 In Figure 1.1, the particles present are represented by . For Examiner’s Use (a) (i) What type of particles is present in the copper crystal? State the interactions within the crystal. Particles : ............................................................................................ Interactions : ............................................................................................ [1] (ii) What type of particles is present in the iodine crystal? State the interactions within the crystal. Particles : ............................................................................................ Interactions : ............................................................................................ [1] (b) Explain why copper is malleable and ductile. ............................................................................................................................ ............................................................................................................................ ............................................................................................................................ [1]

3  Jurong Pioneer Junior College 9729/02/J2 PRELIMINARY EXAM/2019 [Turn Over (c) Give an example of another physical property that is present in one of the above solids but absent in the other. Explain. For Examiner’s Use .......