2019 JPJC Prelim H2 Chem P1 QP

 Jurong Pioneer Junior College [Turn Over NAME CLASS 18S JURONG PIONEER JUNIOR COLLEGE JC2 PRELIMINARY EXAMINATION 2019 CHEMISTRY 9729/01 Higher 2 Paper 1 Multiple Choice 26 September 2019 1 hour Candidates answer on separate paper. Additional Materials: Multiple Choice Answer Sheet Data Booklet READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, glue or correction fluid. Write your name, class and exam index number on the Answer Sheet in the spaces provided unless this has been done for you. There are thirty questions on this paper. Answer all questions. For each question there are four possible answers A, B, C or D. Choose the one you consider correct and record your choice in soft pencil on the separate Answer Sheet. Read the instructions on the 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 booklet. The use of an approved scientific calculator is expected, where appropriate. This document consists of 12 printed pages.

2  Jurong Pioneer Junior College 9729/01/J2 PRELIMINARY EXAM/2019 1 In which of the following pairs do the molecules have similar shapes? A CO2 and SO2 B BF3 and NH3 C H2O and ClO2 D NO2+ and ClO2 2 A to H are consecutive elements with atomic numbers less than 20. The graph below shows their second ionisation energies (2nd IE). Which of the following statements is incorrect? A Element E is from Group 2. B H exists as tetratomic molecules. C The compound formed between A and G is a gas at room temperature. D The 2nd IE of B is lower than that of A due to inter electronic repulsion between its paired p electrons. 3 After an oil spillage at sea, a liquid hydrocarbon layer floats on the surface of the water. Which statements help to explain this observation? 1 Hydrocarbon molecules are not solvated by water. 2 There are onl y instantaneous dipoleinduced dipole interactions between hydrocarbon molecules. 3 Hydrogen bonding between water molecules causes water molecules to be packed closely together. A 2 only B 1 and 2 only C 2 and 3 only D 1, 2 and 3 2nd IE element

3  Jurong Pioneer Junior College 9729/01/J2 PRELIMINARY EXAM/2019 [Turn Over 4 The value of pV is plotted against p for two gases, J and L, where p is the pressure and V is the volume of the gas. Which of the following could be the identities of the gases? Gas J Gas L 1 0.5 mol of H2O at 25 C 0.5 mol of H2 at 50 C 2 0.5 mol of NH3 at 25 C 1 mol of CH4 at 25 C 3 0.25 mol of SO2 at 25 C 0.5 mol of H2 at 25 C A 2 only B 3 only C 2 and 3 only D 1, 2 and 3 5 Use of the Data Booklet is relevant to this question. Which statement about 28.0