2022 JSS Chem Prelims P1

O JURONG SECONDARY SCHOOL 2022 GRADUATION EXAMINATION 2 SECONDARY 4 EXPRESS CANDIDATE NAME CLASS INDEX NUMBER CHEMISTRY 6092/01 PAPER 1 29 August 2022 1 hour Additional Materials: Multiple Choice Answer Sheet. READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, highlighters, glue or correction fluid. Write your name, class and index number on the Answer Sheet in the spaces provided unless this has been done for you. There are forty 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 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. A copy of the Periodic Table is to be found on page 19. The use of an approved scientific calculator is expected, where appropriate. For Examiner’s Use TOTAL [40 marks] This document consists of 19 printed pages including this page. [Turn over] ���

6092/01/GE2/22 [Turn over] 2 1 An experiment is designed to collect a dry sample of carbon dioxide produced when an excess dilute acid is added to 0.35 g of calcium carbonate. Which apparatus set-up is most suitable for this experiment? A B C D ���

6092/01/GE2/22 [Turn over] 3 2 The melting and boiling points of some substances are given in the table. Which substance may be condensed using a water-cooled condenser? substance melting point / ºC boiling point / ºC A ammonia –78 –33 B ethylamine –81 16.6 C methane –182.5 –162 D pentane –130 36 3 The following shows some common cations. 1 Ca2+ 2 Cu2+ 3 Fe3+ 4 Pb2+ Which cations will produce a precipitate when mixed with excess aqueous ammonia? A 1 and 2 only B 2 and 3 only C 3 and 4 only D all of the above 4 Which statement explains why carbon monoxide and ethene diffuse at the same rate? A They are both gases at room temperature. B They both contain the element carbon. C They both react with oxygen. D They have the same relative molecular mass. ���

6092/01/GE2/22 [Turn over] 4 5 Two naturally occurring isotopes of uranium can be represented as U92235 and U92238. Which statement is true? A U92238 has 92 electrons and 146 neutrons. B U92235 has 92 protons and 144 neutrons. C U92235 has the same number of neutrons as the U92238 atom. D U92235 has fewer electrons than the U92238 atom. 6 The diagram below shows a simplified structure for asbestos. What are the bonds present in asbestos? A covalent and ionic bonds B covalent and metallic bonds C covalent bonds and intermolecular forces of attraction D ionic bonds 7 The following shows some simple covalent compounds. 1 CO2 2 CH4 3 NH3 Which contains valence electrons that are not u