2024 MI PU3 MYE P1 (student)

Class Adm No Candidate Name: This question paper consists of 13 printed pages and 1 blank page. 2024 Mid-Year Examination Pre-University 3 H2 CHEMISTRY 9729/01 Paper 1 Multiple Choice 8 Jul 2024 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 1 Use of the Data Booklet is relevant to this question. Which of the following options contain the same number of molecules as one another? 1 750 cm3 of carbon dioxide gas (measured at r.t.p.) 2 1.00 g of oxygen gas 3 1.90 cm3 of ethanol where the density of ethanol is 0.80 g cm–3 A 1 and 2 only B 1 and 3 only C 2 and 3 only D 1, 2 and 3 2 10 cm 3 of a hydrocarbon was burnt in 1 50 cm 3 of oxygen. The resultant gaseous mixture contracted by 30 cm3 when passed through a solution of aqueous sodium hydroxide. The remaining gas was just sufficient to burn exactly 20 cm3 of the same hydrocarbon. Given that all gas volumes were measured at room temperature and pressure , what is the formula of the hydrocarbon? A C2H6 B C3H4 C C3H6 D C3H8 3 Which of the following statements describe the reaction below correctly? 2PCl5 ⇌ PCl4+ + PCl6– 1 PCl4+/ PCl6– is a conjugate acid-base pair. 2 PCl5 is both a Lewis acid and Lewis base. 3 PCl5 is both an Arrhenius acid and Arrhenius base. A 2 only B 3 only C 1 and 2 only D 1 and 3 only 4 The table belows shows the fifth, sixth, seventh and eighth ionisation energies of an element in the third period. 5th 6th 7th 8th ionisation energy / kJ mol-1 7000 8500 27110 31720 Which is the identity of the element? A P B S C Cl D Ar

3 [Turn over 5 Which of the following options are correct? molecule shape polarity 1 BeCl2 bent non-polar 2 NO2 bent polar 3 SO3 trigonal planar non-polar A 1 only B 1 and 3 only C 2 and 3 only D 1, 2 and 3 6 Which of the following compounds is expected to have the greatest degree of covalent character? A