MSHS Chem Prelim P1

Class/ Index Number / Centre Number/ ‘O’ Level Index Number / Name MARIS STELLA HIGH SCHOOL PRELIMINARY EXAMINATION SECONDARY FOUR CHEMISTRY 6092/01 Paper 1 Multiple Choice 3 September 2025 1 hour Additional Materials: Optical Test Answer Sheet (OTAS) – 1 sheet READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, glue or correction fluid. Write your class, index number, Centre number, O level index number and name in the spaces at the top of this page. 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 answer 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 question booklet. A copy of the Periodic Table is printed on page 15. The use of an approved scientific calculator is expected, where appropriate. The total number of marks for this paper is 40. At the end of the examination, hand in the following separately: (1) Optical Test Answer Sheet (OTAS)
 (2) Question Paper This document consists of 15 printed pages.

2 1 The apparatus can be used to show the diffusion of gases. Air is present in the porous tube. The beaker is filled with hydrogen. Assume all gases are at the same temperature and pressure. What would happen to the water level at X over time? A The water level at X will remain unchanged. B The water level at X will drop and remains there. C The water level at X will drop and then return to its original position. D The water level at X will rise and then return to its original position. 2 The table shows some mixtures and their constituents are obtained using suitable separation techniques. mixture constituent obtained 1 NaCl(aq) H2O(l) 2 I2(s) and Ni(s) I2(s) 3 NaCl(aq) NaCl(s) Which row gives the correct separation techniques to obtain the constituents from the mixture? 1 2 3 A distillation sublimation evaporation B distillation sublimation filtration C filtration crystallisation evaporation D sublimation crystallisation filtration 3 An element, Z, has p protons and n neutrons in its nucleus. Which row gives a possible correct number of protons, neutrons and electrons in a negative ion of an isotope of Z? protons neutrons electrons A p n+1 p+1 B p n+1 p−1 C p+1 n p+1 D p+1 n p−1 X beaker filled with hydrogen porous tube air

3 4 The proton numbers of elements X, Y and Z are 6, 8 and 12 respectively. Which row shows the correct formulae of the compounds formed between the elements? compound 1 compound 2 compound 3 A Z2Y XY ZXY3 B ZY XY2 ZXY3 C ZY XY2 ZXY4 D Z2Y XY ZXY4 5 The formation of metallic oxides involves the transfer of electrons from a metal atom to oxygen atoms. In the formation of one mole of metallic oxide, which oxide involve s the transfer of more than 2 moles of electrons from metal atoms? A aluminium oxide B iron(II) oxide C magnesium oxide D sodium oxide 6 Which substance contains atoms bonded to other atoms by less than four covalent bonds? A diamond B poly(ethene) C silicon dioxide D water 7 Solid copper metal, aqueous copper(II) sulfate, solid graphite and molten magnesium chloride will conduct electricity. Which pair of substance will conduct electricity because they both contain mobile electrons? A aqueous copper(II) sulfate and molten magnesium chloride B aqueous copper(II) sulfate and solid copper metal C molten magnesium chloride and solid graphite D solid copper metal and solid graphite

4 8 Which of the statements about iron(III) oxide, Fe2O3, are correct? 1 Iron is present in Fe2O3 as an Fe2+ ion. 2 One mole of Fe2O3 contains 112 g of iron and 48 g of oxygen. 3 The empirical formula is Fe2O3. 4 Three moles of oxygen molecules are needed to make one mole of Fe2O3. A 1 and 2 B 1 and 4 C 2 and 3 D 3 and 4 9 Ammonium nitrate, NH4NO3, (Mr = 80) decomposes to form dinitrogen oxide and water upon heating as shown in the equation below. NH4NO3 → N2O + 2H2O When an impure sample of ammonium nitrate is heated, 27 g of water is formed. Which expression shows the mass of ammonium nitrate in the impure sample? A 66 × 27 36 B 80 × 27 36 C 80 × 27 18 D 80 × 9 36 10 20 cm3 of propene ,C3H6, reacts with 500 cm 3 of oxygen according to the equation shown below. 2C3H6 (g) + 9O2 (g) → 6CO2 (g) + 6H2O (g) When cooled to room temperature, what is the total volume of gas remaining at the end of the reaction? A 120 cm3 B 410 cm3 C 470 cm3 D 530 cm3

5 11 Which method(s) is/are suitable to distingush between 1.00 mol/dm 3 of aqueous hydrochloric acid and 1.00 mol/dm3 of aqueous ethanoic acid? 1 using a pH meter 2 determining the volume of 1.00 mol/dm 3 of sodium hydroxide solution used to neutralise 25.0 cm3 of the acids separately 3 measuring the total volume of hydrogen gas formed when excess magnesium is added to the acids separately A 1 only B 1 and 2 C 1 and 3 D 2 and 3 12 The table shows the properties of four chlorides. Which is copper(II) chloride? colour solubility in water method of preparation A green soluble copper(II) oxide and hydrochloric acid B green insoluble copper metal and hydrochloric acid C white insoluble sodium chloride and copper(II) sulfate D green soluble copper(II) nitrate and hydrochloric acid 13 The following reactions are carried out. reaction result ethanoic acid is added to ammonium carbonate Gas E is produced. ammonium ethanoate is warmed with sodium hydroxide solution Gas F is produced. ethanoic acid is added to an aqueous solution of ammonia Compound G is formed. What are gases E, F and compound G? gas E gas F compound G A ammonia ammonia ammonium carbonate B ammonia carbon dioxide ammonium ethanoate C carbon dioxide carbon dioxide ammonium carbonate D carbon dioxide ammonia ammonium ethanoate 14 Which equation shows a non-redox reaction? A 2H2 + O2 → 2H2O B Fe2+ → Fe3+ + e- C 2H+ + CO32- → H2O + CO2 D CuO + H2 → Cu + H2O

6 15 The reaction between copper and concentrated nitric acid is shown below. Cu + 4HNO3 → Cu(NO3)2 + 2H2O + 2NO2 Which statement about this reaction is correct? A HNO3 is a reducing agent. B The oxidation state of nitrogen in Cu(NO3)2 is -5. C Cu loses electrons during the reaction. D The oxidation state of oxygen has changed. 16 A student conducted three experiments to compare the reactivities of four different metals; copper, magnesium, metal Y and metal Z. A deposit was observed on the metal strip for each experiment. How many metals that were investigated will be able to react with aqueous hydrochloric acid? A 1 B 2 C 3 D 4 17 Hydrogen is produced by the reaction of a metal A and a dilute acid. When the same gas is passed over an oxide of metal B, it reduced the metallic oxide to its metal in the presence of heat. Which substances would give these results? metal A dilute acid metal B 1 calcium hydrochloric acid lead(II) oxide 2 copper hydrochloric acid silver oxide 3 iron sulfuric acid copper(II) oxide 4 zinc sulfuric acid calcium oxide A 1 and 3 only B 1 and 4 only C 2 and 3 only D 2 and 4 only Z+ ions Y2+ ions Cu2+ ions magnesium metal Metal Y copper metal

7 18 Four identical pieces of steel were partially coated with four different substances as shown below. The steel pieces were then left in test tubes filled with water for some days. In which tube would t