2024 Prelims RVHS H2 Chem P1 (QP)

River Valley High School 9729/01/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 H2 CHEMISTRY 9729/01 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 14 printed pages and 2 blank pages.

2 River Valley High School 9729/01/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 11C → 12C B 22Na → 22Ne C 32P → 31P D 40K → 40Ca 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 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 cm3 of 0.100 mol dm−3 sodium percarbonate releases 48.0 cm3 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 4 Which statement does not correctly describe the graphite lattice? A The lattice contains de