RI 2017 Y5 Promo QP

© Raffles Institution 2017 9729/S/17 [Turn Over RAFFLES INSTITUTION 2017 YEAR 5 PROMOTION EXAMINATION Higher 2 CHEMISTRY 27 September 2017 2 h 30 min Additional Materials: Multiple Choice Answer Sheet Data Booklet Writing Paper Graph Paper READ THESE INSTRUCTIONS FIRST Write your name, class and index number in the spaces provided on the OMR Answer Sheet, the cover sheet on page 11 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. Answer all questions. Section A (16 marks) You must answer this section first. The OMR Answer Sheet will be collected 35 minutes after the commencement of the examination. There are sixteen questions in th is 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 Answer Sheet. Read the instructions on the Answer 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 booklet. Section B (34 marks) Answers to this section are to be written on the question paper in the spaces provided. Section C (40 marks) Answers to this section are to be written on the writing paper provided. Write in dark blue or black pen. You may use a soft pencil for any diagrams, graphs or rough working. 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. This document consists of 22 printed pages. This document is copyrighted, please do not reproduce it without permission

© Raffles Institution 2017 9729/S/17 [Turn Over 2 Section A For each question, there are four possible answers, A, B, C, and D. Choose the one you consider to be correct. 1 Which statement about relative molecular mass is correct? A It is the sum of the relative isotopic masses of the most abundant iso tope of each atom within the molecule. B It is the ratio of the weighted average mass of a molecule to 1 12 the mass of 1 mole of 12C atoms. C It is the ratio of the weighted average mass of 6.02 × 1023 molecules to the mass of a 12C atom. D It is the sum of the relative atomic masses of all the atoms within the molecule. 2 A cation G2+ is isoelectronic to PH3. What is the ground state electronic configuration of G? A 1s2 2s2 2p6 3s2 3p4 B 1s2 2s2 2p6 3s2 3p6 C 1s2 2s2 2p6 3s2 3p6 3d2 D 1s2 2s2 2p6 3s2 3p6 4s2 3 Which particles have one unpaired d electron? 1 copper ion in Cu2O 2 zinc ion in Zn(NO3)2 3 titanium ion in Ti2(SO4)3 A 3 only B 1 and 2 C 1 and 3 D 2 and