2024_CCKSS_4E_Prelim_SciCH_P1

Marks: O LEVEL PRELIMINARY EXAMINATION 2024 40 Secondary Four Express CANDIDATE NAME CLASS INDEX NUMBER SCIENCE (CHEMISTRY, BIOLOGY) 5088/01 Paper 1 Multiple Choice 30 August 2024 Additional Materials: Multiple Choice Answer Sheet (OAS) 1 hour READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, glue or correction fluid. Write your name, index number and class 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 on this paper. A copy of the Data Sheet is printed on page 9. A copy of the Periodic Table is printed on page 10. The use of an approved scientific calculator is expected, where appropriate. This document consists of 10 printed pages. Setter: Mrs Trina Wong Vetter: Ms Ang Jia Wei [Turn over

2024 / 4E / SCI CHEM / PRELIM / P1 2 1 A titration is carried out to measure the volume of hydrochloric acid needed to neutralise aqueous sodium hydroxide. Exactly 25.0 cm3 of aqueous sodium hydroxide is measured out into a conical flask and the hydrochloric acid is added drop by drop. Which apparatus is used during this experiment? aqueous sodium hydroxide hydrochloric acid A burette pipette B measuring cylinder burette C pipette burette D pipette measuring cylinder 2 A colourless solution P is tested separately with aqueous sodium hydroxide and with aqueous silver nitrate acidified with nitric acid. The results are shown. test aqueous sodium hydroxide aqueous silver nitrate acidified with nitric acid result white precipitate insoluble in excess white precipitate What is P? A calcium chloride B calcium sulfate C zinc chloride D zinc sulfate

2024 / 4E / SCI CHEM / PRELIM / P1 [Turn over 3 3 Paper chromatography is carried out on a mixture X and four individual dyes using the same solvent. Which dyes does mixture X contain? A 1 and 2 B 1 and 3 C 2 and 4 D 3 and 4 4 Which statement about isotopes of the same element is correct? A They have different numbers of electrons but the same number of protons. B They have different numbers of electron shells but the same number of neutrons. C They have different numbers of neutrons but the same number of electron shells. D They have different numbers of protons but the same number of electrons. 5 Elements X and Y react to form a compound. Element X loses two electrons and element Y gains one electron. What is the charge on the ions of elements X and Y and what is the formula of the compound? charge on ion of X ch