2021 PU1 H2 EOY P1

Class Adm No Candidate Name: This question paper consists of 18 printed pages and 2 blank pages. 2021 End-of-Year Examination Pre-University 1 H2 CHEMISTRY 9729/01 Paper 1 Multiple Choice & Structured Questions 15 Oct 2021 2 hours Additional materials: Multiple Choice Answer Sheet Data Booklet READ THESE INSTRUCTIONS FIRST Do not turn over this question paper until you are told to do so Write your name, class and admission number on all the work you hand in. For Section A, there are fifteen questions. Answer ALL questions. 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 Multiple Choice Answer Sheet provided. Each correct answer will score one mark. A mark will not be deducted for a wrong answer. Read the instructions on the Multiple Choice Answer Sheet very carefully. For Section B, write in dark blue or black pen. You may use an HB pencil for any diagrams or graphs. Do not use staples, paper clips, glue or correction fluid. Answer all the questions. The use of an approved scientific calculator is expected , where appropriate. Any rough working should be done in this question paper. Question Section A 1 2 3 4 5 6 7 Total Marks 15 6 9 16 6 6 3 9 70

2 Section A – Multiple Choice For each question there are four possible answers, A, B, C, and D. Choose the one you consider to be correct. 1 Which statements about cyclohexane are correct? C C C C C C H H H H H H H H H HH H cyclohexane 1 Its empirical formula is CH2. 2 Its molecular formula is C6H12. 3 Its relative molecular mass is 48.0. A 1, 2 and 3 B 1 and 2 only C 2 and 3 only D 1 only 2 Some hydrocarbon gas was combusted in excess oxygen at room temperature and pressure. volume of hydrocarbon gas combusted 10 cm3 volume of oxygen available before combustion 90 cm3 total volume of gases after combustion 70 cm3 remaining volume of gas after passing gases through NaOH(aq) 40 cm3 What is the molecular formula of the hydrocarbon? A C3H6 B C3H8 C C4H8 D C4H10 3 Which statement about beryllium chloride, BeCl2, is correct? A BeCl2 has a bent shape. B BeCl2 is an ionic compound. C BeCl2 can behave as a Lewis acid. D BeCl2 accepts electrons into the 1s orbital of the Be atom.

3 [Turn over 4 When zinc nitrate is heated strongly, it decomposes to form zinc oxide and two gases. 2Zn(NO3)2(s) ⟶ 2ZnO(s) + 4NO2(g) + O2(g) Which statement about the decomposition of zinc nitrate is correct? A Zinc nitrate was neither oxidised nor reduced. B Zinc nitrate was oxidised to form zinc oxide. C Zinc nitrate was oxidised to form nitrogen dioxide. D Zinc nitrate was oxidised to form oxygen. 5 I