SMSS Sec 3 pure chem paper 1 2024

1 This document consists of 9 printed pages. ST. MARGARET’S SCHOOL (SECONDARY) End-of-Year Examinations 2024 CANDIDATE NAME CLASS REGISTER NUMBER CHEMISTRY Paper 1 Multiple Choice Secondary 3 Express 6092/01 26 September 2024 2 hours 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 register number on the cover page in the spaces provided. There are twenty 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. Each correct answer will score one mark. A mark will not be deducted for a wrong answer. The total mark for the paper is 20. Any rough working should be done in this booklet. A copy of the Periodic Table is printed on page 9. Paper 1 and 2:

2 SMS(S) 2024 1 A student carried out an experiment involving the reaction between calcium carbonate and dilute hydrochloric acid. Based on the experimental results obtained, a graph of volume of gas produced against time was plotted. Which apparatus were used by the student to make the necessary measurements? A burette, pipette and stopwatch B electronic balance and gas syringe C gas syringe and stopwatch D pipette and stopwatch 2 Aqueous iron(II) sulfate, a pale green solution, is distilled using the set-up shown. What is the temperature shown by the thermometer and the colour of the distillate in the conical flask? temperature / ºC colour of distillate A B C D 100 100 106 106 colourless pale green colourless pale green thermomete r distillate thermometer

3 SMS(S) 2024 3 Dry ice sublimes at −78 ºC. Which statement describes what happens to dry ice at 0 ºC? A The carbon dioxide particles become closely packed. B The carbon dioxide particles become far apart. C The carbon dioxide particles become smaller. D The carbon dioxide particles lose energy to the surroundings. 4 A balloon filled with gas X is placed inside a beaker filled with gas Y. After a few hours, the balloon shrinks in size. Which pair of gases would not cause the result shown above? gas X gas Y A ammonia nitrogen B carbon dioxide argon C nitrogen carbon dioxide D oxygen fluorine 5 In which option does each of the three particles have the same total number of electrons? A Cl−, Br−, I− B F−, Ne, Na+ C K+, Br–, Ca2+ D Li+, Na+, K+ gas X gas Y balloon

4 SMS(S) 2024 6 J, K and L are three different elements in the Periodic Table. The ‘dot and cross’ diagram (showing only the valence electrons) of the compo