FHSS Chem Prelim P1

Candidate Name: Class Index No. FUHUA SECONDARY SCHOOL 4E Secondary Four Express Preliminary Examination 2025 Fuhua Secondary Fuhua Secondary Fuhua Secondary Fuhua Secondary Fuhua Secondary Fuhua Secondary Fuhua Secondary Fuhua Secondary Fuhua Secondary Fuhua Secondary Fuhua Secondary Fuhua Secondary Fuhua Secondary Fuhua Secondary Fuhua Secondary Fuhua Secondary Fuhua Seconda ry Fuhua Secondary Fuhua Secondary Fuhua Secondary Fuhua Secondary Fuhua Secondary Fuhua Secondary Fuhua Secondary Fuhua Secondary Fuhua Seconda ry Fuhua Secondary Fuhua Secondary Fuhua Secondary Fuhua Secondary Fuhua Secondary Fuhua Secondary Fuhua Secondary Fuhua Secondary Fuhua Seconda ry Fuhua Secondary CHEMISTRY 6092/01 Paper 1 Multiple Choice 03 September 2025 0800 – 0900 1 hour Additional Material: Optical Mark Recognition (OMR) READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, glue or correction fluid. Write your name, class, index number on the OMR and this question booklet. 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 OMR. 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 Periodic Table is printed on page 13. The use of an approved scientific calculator is expected, where appropriate. Setter: Mr Elton Tan Vetter: Mr Nicholas Liu This question paper consists of 13 printed pages including this page. PARENT'S SIGNATURE FOR EXAMINER'S USE 40

2 1 The melting points and boiling points of four substances are shown. Which substance exist as a monatomic gas at –200°C? substance melting point / °C boiling point / °C A argon –189 –186 B hydrogen –259 –253 C neon –249 –246 D nitrogen –210 –196 2 The diagram shows a set-up used to separate hexane (boiling point, 70 °C) and heptane (boiling point, 98 °C). Which graph would be obtained if the temperature at point T was plotted against the total volume of distillate collected? A B C D

3 3 A student wants to show that the rate of the reaction between a fixed mass of calcium carbonate and dilute hydrochloric acid doubles for every 10 °C rise in temperature. The student wants to measure the volume of carbon dioxide released to find the rate of reaction. The student has a measuring cylinder and a gas syringe. What other essential apparatus are required? A Bunsen burner, burette, electronic balance, stopwatch B Bunsen burner, electronic balance, stopwatch, thermometer C Bunsen burner, pipette, stopwatch, thermometer D burette, pipette, electronic balance, thermometer 4 Some properties of substances X, Y and Z are given in the table below. substance percentage composition by mass solid conducts electricity changes on heating X constant yes solid burns in air to form an oxide Y constant no solid decomposes Z varies yes solid melts Which classification of the substances is correct? element mixture compound A X Z Y B Y Z X C Z Y X D X Y Z 5 The diagram below shows the chromatogram of four substances, W, X, Y and Z. Which statement is correct? A W contains X and Y. B X is more soluble than Z. C Y contains three components. D Z has a larger Rf value than X.

4 6 The atomic number of cerium, Ce, is 58. A Ce4+ ion has 140 nucleons. How many neutrons and electrons are there in one Ce4+ ion? neutrons electrons A 82 54 B 82 62 C 140 54 D 140 62 7 Diamond, graphite, iodine and silicon dioxide all contain covalent bonds. Which statement is correct? A Diamond has atoms that are arranged in a tetrahedral structure. B Graphite is used as a lubricant because each layer in its structure is held to the next layer by strong covalent bonds. C Iodine changes from solid to gas upon gentle warming as its covalent bonds are weak. D Both graphite and silicon dioxide can conduct electricity due to the presence of mobile electrons. 8 The electronic configurations of three particles, X, Y and Z are shown. particles electronic configuration X 2,1 Y 1 Z 2,8,7 Which statement is true about these three particles? A X forms covalent bonds with Z. B X forms ionic bonds with Y. C Y can only form ionic bonds. D Y forms ionic bonds with Z. 9 Peeling onions often causes tearing of the eyes due to the release of a sulfide compound. Peeling them under running water reduces the problem. Which of the following statements are true about the sulfide compound? 1 It is volatile. 2 It is soluble in water. 3 It is an ionic compound with strong ionic bonds. 4 It is a covalent compound with weak covalent bonds. A 1 and 2 B 1 and 3 C 1 and 4 D 2 and 4

5 10 Which molecule has the greatest number of bonded electrons? A C2H4 B CO2 C CH3OH D HCO2H 11 Hydrazine, N 2H4, is a powerful reducing agent. When reacted with an aqueous solution containing silver ions, nitrogen is one of the products formed. Which ionic equation best represents this reaction? A N2H4 + 2Ag+ → N2 + 2AgH2 B N2H4 + Ag+ → N2 + 2H2 + Ag C N2H4 + Ag+ → N2 + H+ + Ag D N2H4 + 4Ag+ → N2 + 4H+ + 4Ag 12 An element burns in air to form a compound which dissolves in dilute hydrochloric acid and aqueous sodium hydroxide. What is the element? A carbon B iron C aluminium D sulfur 13 The results of some experiments with sulfur dioxide are shown. experiment description result 1 mix with dilute hydrochloric acid does not react 2 mix with concentrated sodium hydroxide a salt is formed 3 add Universal Indicator Universal Indicator turns violet 4 add acidified aqueous potassium manganate(VII) purple solution turns colourless Which experiments show correct results? A 1 and 2 only B 3 and 4 only C 1, 2 and 4 D 2, 3 and 4 14 Calcium chloride is made by adding powdered calcium carbonate to dilute hydrochloric acid. Which row identifies the reagent that should be added in excess and the purification method that is used to make a pure and dry sample of calcium chloride? excess reagent purification method A calcium carbonate filtration only B calcium carbonate filtration and crystallisation C dilute hydrochloric acid filtration only D dilute hydrochloric acid filtration and crystallisation

6 15 The graph below shows the mass of precipitate Y formed when aqueous lead(II) nitrate and solution X are added successively to unknown solution M. What is the possible identities of precipitate Y and solution X? precipitate Y solution X A PbCl2 NaOH B PbCO3 HNO3 C Pb(NO3)2 HNO3 D PbSO4 NaOH 16 Zinc oxide is produced by heating zinc carbonate. What is the percentage yield of zinc oxide if 125 g of zinc carbonate produces 75 g of zinc oxide on heating? A 75 81 × 100 B 125 × 81 75 × 100 C 75 125 × 100 D 75 81 × 125 × 100 17 A fuel gas cylinder contains 6 g of ethane gas, C2H6, under room temperature and pressure. Which statement is incorrect? A It contains 1.2 mol of hydrogen atoms. B It contains 0.2 mol of ethane molecules. C It contains 1.20 x 1023 ethane molecules. D It occupies a volume of 0.25 dm3. 18 60 cm3 of hydrogen are reacted with 30 cm3 of oxygen to form water vapour. What are the volumes of the gases remaining, at room temperature and pressure? hydrogen / cm3 oxygen / cm3 water vapour / cm3 A 30 0 0 B 30 15 30 C 0 0 60 D 0 0 0 precipitate Y solution X

7 19 Four experiments of rusting are shown. Which two experiments can be used to show that oxygen is needed for iron to rust? A 1 and 3 B 1 and 4 C 2 and 3 D 2 and 4 20 A small piece of sodium is added to aqueous iron(II) sulfate. Which of the following is not observed during