Pasir Ris 2024 4E Chem Prelim P1

Name Class Register Number SECONDARY 4 EXPRESS PRELIMINARY EXAMINATION 2024 CHEMISTRY Paper 1 Multiple Choice Monday 0920 – 1020 6092/01 26 Aug 2024 1 hour Additional Material: Multiple Choice Answer Sheet READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, glue or correction fluid. Write your name, class and register number on the Answer Sheet in the spaces provided. 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 14. The use of an approved scientific calculator is expected, where appropriate. This document consists of 14 printed pages, including the cover page. Setter: Mr Chua Khoon Wee [Turn over Pasir Ris Secondary School

PRSS_2024_S4E_PRELIM_CHEM_ 6092_P1 2 1 Which apparatus can be used to determine the end-point of the neutralisation reaction between hydrochloric acid and potassium hydroxide? A electronic balance B gas syringe C stopwatch D thermometer 2 Which property of a liquid ester can be used to check its purity before use as a food flavouring? A boiling point B colour C smell D solubility in water 3 Which sequence of procedures is used to separate a pure, dry sample of hydrated copper( II) sulfate, CuSO 4•5H2O, from a mixture containing hydrated copper( II) sulfate and calcium carbonate, CaCO3? A dissolve in water → distillation → crystallisation B dissolve in water → filtration → crystallisation C distillation → crystallisation → heating to remove all water D fractional distillation → filtration → heating to remove all water 4 The melting and boiling points of four substances are given. substance melting point / oC boiling point / oC W 50 90 X 70 600 Y –30 –12 Z –15 101 At what temperature would there be exactly two substances in liquid state? A –20 oC B 0 oC C 16 oC D 60 oC 5 The rate of diffusion of two gases is measured at constant pressure. Which gas would diffuse the fastest? A carbon monoxide at 25 oC B carbon monoxide at 50 oC C oxygen at 25 oC D oxygen at 50 oC

PRSS_2024_S4E_PRELIM_CHEM_ 6092_P1 3 6 Which ion contains the smallest number of electrons? A B3+ B Be2+ C H– D He+ 7 An element J forms an ion J2–. The electronic configuration of this ion is 2.8. Which statement is true? A J is in Group 2 and Period 2. B J is in Group 2 and Period 3. C J is in Group 16 and Period 2. D J is in Group 16 and Period 3. 8 A new substance was discovered and a series of experiments was cond