RI 2022 Y5 Promo QP

1 © Raffles Institution 2022 9729/S/22 [Turn Over Name: ( ) Class: 23S0____ RAFFLES INSTITUTION 2022 Year 5 Promotion Examination HIGHER 2 CHEMISTRY 9729 28 September 2022 2 hours 30 minutes Additional Materials: Multiple Choice Answer Sheet Data Booklet READ THESE INSTRUCTIONS FIRST Write your name, 6 -digit index number and civics tutorial group in the spaces provided on the OMR sheet and the cover sheets on pages 1 and 23. Shade in your 6-digit exam index number on the OMR Answer Sheet. This paper consists of three sections A, B and C. Section A (15 marks) consists of 15 multiple-choice questions. Answer this section first. Your OMR Answer Sheet will be collected after the first 30 minutes. Record your answers to this section in soft pencil on the OMR Answer Sheet. Section B (35 marks) consists of 2 structured questions. Answer all questions. Answers to this section are to be written in the spaces provided in the question paper. Section C (40 marks) consists of 3 free-response questions. Write your answers in the spaces provided in the question paper. If additional space is required, you should use page 35 at the end of the booklet for Section C. The question number must be clearly shown. The number of marks is given in brackets [ ] at the end of each question or part question. Write in dark blue or black pen. You may be subject to penalty for writing answers in pencil. Answers to Sections B and C are to be handed in separately. Question Marks B1 / 19 B2 / 16 This document consists of 34 printed pages and 1 blank page.

2 © Raffles Institution 2022 9729/S/22 [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 An equimolar mixture of CS2 and H2S is completely burned in excess oxygen. What will be the SO2 : CO2 mole ratio in the mixture obtained after complete combustion? A 1 : 1 B 2 : 1 C 3 : 1 D 4: 1 2 Use of the Data Booklet is relevant to this question. An ion has • a nucleon number of 267, • 60 more neutrons than electrons, • an atomic number of 104, 105, 106 or 107. What could this ion be? A Rf2+ B Db3+ C Sg4+ D Bh5+ 3 The ionisation energies (I.E.), in kJ mol–1, of five elements are given in the table. 3rd I.E. 4th I.E. 5th I.E. O 5320 7450 10990 F 6040 8410 11023 Ne 6150 9290 12177 Na 6940 9540 13354 Mg 7740 10500 13636 Which statement is correct? A The 3rd I.E. of Na is higher than that of Ne because Na2+ has one more shell than Ne2+. B The 4th I.E. of the above elements involves the removal of an electron from the same sub-shell. C The 5th I.E. of F is higher than that of O becau