RI 2021 Year 6 June TP QP

Name: ( ) Class: 21S0____ RAFFLES INSTITUTION 2021 Year 6 Term 3 Common Test HIGHER 2 CHEMISTRY 9729 1 July 2021 2 hours 45 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 sheet on page 21. 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 separate OMR Answer Sheet. Section B (40 marks) consists of 3 structured questions. Answer all questions in the spaces provided in the question paper. If additional space is required, you should use the page s at the end of the booklet for Section B (pages 19 – 20). The question number must be clearly shown. Section C (40 marks) consists of 4 free-response questions. Answer both C1 and C2 and answer only one of C3 EITHER or C3 OR. Write your answers in the spaces provided in the question paper. If additional space is required, you should use the page s at the end of the booklet for Section C (pages 38 – 40). 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 / 17 B2 / 13 B3 / 10 This document consists of 39 printed pages and 1 blank page. This document is copyrighted, please do not reproduce it without permission

2 Raffles Institution 2021 9729/J/21 [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 Estradiol (Mr = 272.0), C18H24O2, is an important hormone found in the female body. estradiol What is the volume of gas formed when 76 mg of estradiol is reacted with excess sodium at s.t.p.? A 3.17 cm3 B 3.35 cm3 C 6.34 cm3 D 6.71 cm3 2 Use of the Data Booklet is relevant to this question. Which species has more electrons than neutrons? (D = H1 2 ) A 11BD4– B CD3– C ND4+ D D3O+ 3 The boiling point of butan-1-ol is greater than 2-methylpropan-2-ol. Which statements can explain why this is the case? 1 The strength of the instantaneous dipole –induced dipole interactions is greater in butan-1-ol than in 2-methylpropan-2-ol. 2 The strength of the hydrogen bonds is greater in butan-1-ol than in 2-methylpropan-2-ol. 3 The extent of hydrogen bonding is greater in butan-1-ol than in 2-methylpropan-2-ol. A 1, 2 and 3 B 1 and 3 only C 1 only D 2 only