RVHS H1 Chemistry P1 QP 2024

River Valley High School 8873/01/PRELIMS/24 2024 Preliminary Examination [Turn over RIVER VALLEY HIGH SCHOOL JC 2 PRELIMINARY EXAMINATION CANDIDATE NAME CLASS 2 3 J CENTRE NUMBER S INDEX NUMBER H1 CHEMISTRY 8873/01 Paper 1 Multiple Choice 18 September 2024 1 hour Additional Materials: Multiple Choice Answer Sheet Data Booklet READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, glue or correction fluid. Write your name, class, centre number and index number on the Answer Sheet in the spaces provided. There are thirty 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. The use of an approved scientific calculator is expected, where appropriate. This document consists of 15 printed pages and 1 blank page.

2 River Valley High School 8873/01/PRELIMS/24 2024 Preliminary Examination 1 Use of the Data Booklet is relevant to this question. Some isotopes are unstable and decompose naturally. In one type of decomposition, a neutron in the nucleus decomposes to form a proton, which is retained in the nucleus, and an electron, which is expelled from the atom. Which change describes such a process? A 40K → 40Ca B 32P → 31P C 22Na → 22Ne D 11C → 12C 2 Which statement is correct? A One mole of a compound is the amount that contains the same number of atoms as there are in 12.000 g of carbon-12. B The relative isotopic mass of lithium-7 is given by the following expression. average mass of all isotopes of lithium 1 the mass of one atom of carbon-1212 C The relative atomic mass of oxygen is given by the following expression. average mass of one atom of oxygen 1 the mass of one atom of carbon-1212 D The relative molecular mass of a compound E is given by the following expression. average mass of one atom of E 1 the mass of one molecule of carbon-1212

3 River Valley High School 9729/01/PRELIMS/24 2024 Preliminary Examination [Turn over 3 Atoms of elements have specific electronic arrangements. Which statements are correct? 1 The electrons always occupy the lowest vacant orbitals available. 2 The order of filling the orbitals is 1s, 2s, 2p, 3s, 3p, 3d, 4s. 3 The shell with the principal quantum number 2 can hold a maximum of 18 electrons. A 1 only B 1 and 2 only C 2 and 3 only D 1, 2 and 3 4 Which statement does not correctly describe the graphite lattice? A The lattice contains delocalised electrons. B Each carbon atom in the lattice has three closest neighbours. C Weak intermolecular forces of attraction hold each layer of carbon atoms together. D Conduction of electricity takes place parallel to the axis of the 2p orbitals. 5 Use of the Data Booklet is relevant to this question. Which particle contains a single unpaired electron? A a molecule of NO2 B a molecule of AlCl3 C the copper ion in Cu2O D the lithium ion in lithium aluminium hydride

4 River Valley High School 8873/01/PRELIMS/24 2024 Preliminary Examination 6 The pH range and colour changes for two acid-base indicators are given below. indicator colour in acidic solution pH range colour in basic solution P red 3.0 – 5.0 yellow Q yellow 5.7 – 7.6 blue When P and Q are separately added to a solution, the solution turns yellow. What conclusion can be drawn? A It is neutral. B It is weakly acidic. C It is weakly alkaline. D It is strongly alkaline. 7 Which statement about the HCO3− ion and CO32− ion is correct? A They are isoelectronic. B They form the blood buffer system to control pH. C CO32− can only exhibit basic properties and HCO 3− can only exhibit acidic properties. D They are a conjugate acid-base pair because they are made up of a weak acid and a weak base.

5 River Valley High School 9729/01/PRELIMS/24 2024 Preliminary Examination [Turn over 8 The graph shows the change in pH when a solution containing 0.100 mol dm−3 acid is gradually added to 10 cm3 of 0.100 mol dm−3 sodium hydroxide. Which acid is used in the above titration? A (COOH)2 B H2SO4 C HCl D CH3COOH 9 Which statement about the elements in Period 3 is incorrect? A The element with the smallest anion is chlorine. B The element with the highest melting point is aluminium. C The element with the highest electrical conductivity is aluminium. D The element with eight atoms in its molecule is sulfur.

6 River Valley High School 8873/01/PRELIMS/24 2024 Preliminary Examination 10 A beaker contains a mixture of magnesium oxide, aluminium oxide and silicon dioxide. A student was asked to perform the following procedure to separate the compounds: Step I: To the mixture, add NaOH(aq) and stir well with a glass rod. Step II: Filter to obtain the filtrate and residue. Step III: To the residue, add HCl(aq) and stir well with a glass rod. Step IV: Filter to obtain the filtrate and residue. Which of the following information is true about the above procedure? A The only species that remained unreacted after step IV was silicon dioxide. B After step II, the filtrate contains only magnesium hydroxide. C The residue of step III contains only aluminium oxide. D A gas was produced when HCl(aq) was added in step III. 11 Which of the following statements is incorrect about Group 1 and Group 17 elements? A The ionisation energies of Group 1 and Group 17 elements decrease down the groups. B Reducing power of Group 1 elements increases down the group while oxidising power of Group 17 elements decreases down the group. C Group 1 elements are good reducing agents while Group 17 elements are good oxidising agents. D Group 1 element has smaller atomic radius as compared to Group 17 element in the same Period.

7 River Valley High School 9729/01/PRELIMS/24 2024 Preliminary Examination [Turn over 12 Use of Data Booklet is relevant to this question. Sodium percarbonate, (Na 2CO3)x.y(H2O2), is an oxidising age nt in some home and laundry cleaning products. 10.0 cm 3 of 0.100 mol dm −3 sodium percarbonate releases 48.0 cm 3 of carbon dioxide at room conditions on acidification. An identical sample, on titration with 0.0500 mol dm −3 KMnO4, requires 24.0 cm 3 before the first pink colour appears. KMnO4 reacts with H2O2 in the mole ratio 2 : 5. What is the ratio y x ? A 1 3 B 2 3 C 3 2 D 3 1 13 Use of Data Booklet is relevant to this question. Hydrogenation of carbon dioxide to form ethanol is found to be effective in the presence of a mixture of K/Cu-Zn-Fe oxide catalyst. The equation for the reaction is shown. 2CO2(g) + 6H2(g) C2H5OH(l) + 3H2O(l) Calculate the volume of carbon dioxide required to produce 100 kg of ethanol assuming complete reaction at standard temperature and pressure. A 104000 dm3 B 98700 dm3 C 52200 dm3 D 49300 dm3 14 Use of the Data Booklet is relevant to this question. Which one of the following has the same number of particles as one mole of helium atoms? A the number of ions in 74.6 g of potassium chloride B the number of atoms in 44.0 g of carbon dioxide gas C the number of ions in 1 dm3 of 0.50 mol dm−3 of aqueous nitric acid D the number of delocalised electrons in 1 mole of aluminium metal

8 River Valley High School 8873/01/PRELIMS/24 2024 Preliminary Examination 15 Recovery of any sulfur from petroleum is an important process in oil refineries. Sulfur compounds are converted into the gas hydrogen sulfide, H 2S, by using a catalyst. The H2S is then oxidised by using a controlled