2021 MI Prelim H2 Chemistry P1 (9729_01)

Class Adm No Candidate Name: This question paper consists of 11 printed pages and 1 blank page. 2021 Preliminary Examination Pre-University 3 H2 CHEMISTRY 9729/01 Paper 1 Multiple Choice 21 Sep 2021 1 hour 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 in soft pencil. Do not use staples, paper clips, glue or correction fluid. Write your name, class and admission number in the spaces provided at the top of this page and on the Multiple Choice Answer Sheet provided. There are thirty questions on this paper. 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. Read the instructions on the Multiple Choice 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 this question paper. The use of an approved scientific calculator is expected, where appropriate. FOR EXAMINER’S USE TOTAL (30 marks)

2 For each question there are four possible answers, A, B, C, and D. Choose the one you consider to be correct. 1 Which of the following contains the same number of stated particles as the number of atoms in 19.0 g of fluorine gas? 1 Number of molecules in 2.0 g of hydrogen gas 2 Number of ions in 58.5 g of sodium chloride solid 3 Number of atoms in 14.0 g of nitrogen gas 4 Number of atoms in 12.0 g of graphite A 3 only B 1, 3 and 4 only C 2, 3 and 4 only D 1, 2, 3 and 4 2 20 cm3 of an unknown hydrocarbon was completely combusted in excess oxygen gas. Upon cooling back to room temperature and pressure, the total volume of gases was 50 cm3 less than the initial total volume. After passing the remaining gases through KOH(aq), the volume of gases further decreased by 80 cm3. What is the molecular formula of the unknown hydrocarbon? A C2H4 B C4H4 C C4H6 D C4H8 3 Which of the following statements is incorrect about the following reaction? 3VO2– + 2H+ → VO3– + 2VO + H2O A It is a displacement reaction. B The oxidation number of V in VO3– is +5. C VO2– is acting as a reducing agent. D VO2– is acting as an oxidising agent.

3 [Turn over 4 Use of the Data Booklet is relevant to this question. A copper rod weighing 15 g was dipped into 50 cm3 of 2.00 mol dm–3 AgNO3 solution. Silver crystals were observed to grow on the copper rod after a while. Which of the following statements are correct? 1 The EcellO of the reaction is +1.14V. 2 The solution turns blue. 3 6.35 g of copper would have reacted upon completion of reaction. A 1 only B 2 only C 2 and 3 only D 1, 2 and 3 5 Which of the following statements is not true about lithium? A It has a naturally occurring i