RI 2019 Y5 Promo QP

RAFFLES INSTITUTION 2019 YEAR 5 PROMOTION EXAMINATION Higher 2 CHEMISTRY 9729 2 October 2019 2 hours 30 minutes Additional Materials: Multiple Choice Answer (OMR) Sheet Writing Paper Data Booklet READ THESE INSTRUCTIONS FIRST Write your name, index number and civics tutorial group in the spaces provided on the OMR Sheet, the cover sheets on pages 13 and 15, and the writing paper used for Section C. Do not use staples, paper clips, highlighters, glue or correction fluid. This paper consists of three sections, A, B and C. Section A (15 marks) Answer this section first. The OMR sheet will be collected after the first 30 minutes. There are fifteen questions in this section. For each question there are four possible answers A, B, C and D. Choose the one you consider correct and record your choice in soft pencil on the OMR Sheet. Read the instructions on the OMR Sheet very carefully. Each correct answer will score one mark. A mark will not be deducted for a wrong answer. Any rough working should be done in the question paper. Section B (35 marks) There are three questions in this section. Answers to this section are to be written in the spaces provided in the question paper. Section C (40 marks) There are three questions in this section. Answers to this section are to be written on the writing paper provided. You are to begin each question on a fresh sheet of paper. Write in dark blue or black pen. You may use a pencil for any diagrams or graphs. You are reminded of the need for good English and clear presentation in your answers. At the end of the examination, fasten your answers to Section C securely together. Answers to Sections A, B and C are to be handed in separately. The number of marks is given in brackets [ ] at the end of each question or part question. This document consists of 25 printed pages and 1 blank page.

2 © Raffles Institution 2019 9729/O/19 [Turn Over Section A (15 marks) For each question, there are four possible answers, A, B, C, and D. Choose the one you consider to be correct. 1 Which statement is correct? A One mole of a compound is the amount that contains the same number of atoms as there are atoms in 12.000 g of carbon-12. B The relative molecular mass of a compound E is given by the following expression. average mass of one atom of E 1 12 the mass of one molecule of carbon-12 C The relative isotopic mass of lithium-7 is given by the following expression. average mass of all isotopes of lithium 1 12 the mass of one atom of carbon-12 D The relative atomic mass of oxygen is given by