MI 2022 PU1 H2 CHEM EOY

Class Adm No Candidate Name: This question paper consists of 17 printed pages and 1 blank page. 2022 End-of-Year Examination Pre-University 1 H2 CHEMISTRY 9729/01 Paper 1 Multiple Choice & Structured Questions 12 Oct 2022 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 Section B Total 1 2 3 4 5 6 Marks 15 10 12 10 8 9 6 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 How many subshells and orbitals are there in principal quantum shell number 3? subshells orbitals A 2 4 B 2 6 C 3 6 D 3 9 2 Use of the Data Booklet is relevant to this question. The following are flight paths of charged particles when accelerated in an electric field. Which correctly identifies S, T and U? S T U A 14N+ 14C– 14C2– B 14N– 12C+ 12C2+ C 12C– 14N2+ 14N+ D 14C– 12C+ 14N+ 3 In microwave ovens, the energy produced is absorbed by polar molecules. Which of the following would absorb microwave energy? 1 CO2 2 BrF3 3 BF3 4 SO2 A 1 and 2 only B 1 and 3 only C 2 and 3 only D 2 and 4 only

3 [Turn over 4 Which of the following cannot be explained by hydrogen bonding? A difference in boiling point between ethanol and hexan-1-ol B difference in melting point between H2O and HF C higher than expected relative molecular mass of ethanoic acid in benzene D difference in density between water and ice 5 Trifluorooxonium has the formula OF3n+ and its shape is trigonal pyramidal. What is the value of n in trifluorooxonium? A 1 B 2 C 3 D 4 6 Histamine is produced in the body to help fight infection. Its shape allows it to fit into receptors which expand blood vessels. histamine What are the values of the bond angles x, y and z? x y