2022 EFSS Chem Prelims P1

EDG/PRELIM22/CHEM/6092/01/4EXP/SHA [Turn over FOR EXAMINER’S USE My target grade/mark: _________ TOTAL / 40 Parent’s signature This document consists of 18 printed pages. Candidate Name: Candidate Index Number: Class: CHEMISTRY Paper 1 Multiple choice 6092/01 August 2022 Additional Materials: Multiple Choice Answer Sheet 1 hour EDGEFIELD SECONDARY SCHOOL 2022 Preliminary Examination Secondary 4 Express READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, glue or correction fluid. Write your class, name and class register number in the above boxes. 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 printed on page 18. The use of an approved scientific calculator is expected, where appropriate. O Syllabus ���

EDG/PRELIM22/CHEM/6092/01/4EXP/SHA 2 1 The following diagram shows an experimental setup used by a student to prepare carbon monoxide from charcoal. What should the student do to obtain a purer yield of carbon monoxide? A Use dilute sulfuric acid instead of dilute hydrochloric acid so that hydrogen chloride gas will not be formed. B Bubble the stream of gas from X into a flask containing drying agent before collection. C Pass the stream of gas from X through a filtering system to remove soot produced from charcoal. D Pass the stream of gas from X into a flask containing aqueous sodium hydroxide before collection. 2 How many of the molecules shown contain only one single covalent bond? Cl2 H2 N2 O2 CO2 A 1 B 2 C 3 D 4 ���

EDG/PRELIM22/CHEM/6092/01/4EXP/SHA [Turn over 3 3 The apparatus is set up, using different gases in the two inverted beakers. Which pair of gases would cause an upward movement of the water level at U? gas 1 gas 2 A helium carbon monoxide B helium hydrogen C nitrogen carbon monoxide D nitrogen hydrogen 4 The graph shows the change in temperature with time when a substance at 120 °C is cooled to –20 °C. Which statement correctly describes the change taking place between the points? A The volume of vapour is decre