2024 HYSS Chem P1

[Turn Over HUA YI SECONDARY SCHOOL PRELIMINARY EXAM 2024 4-G3 NAME CLASS INDEX NUMBER CHEMISTRY 6092/01 PAPER 1 (XX) 21 August 2024 1 hour Additional Materials: Multiple Choice Answer Sheet READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, highlighters, glue, or correction fluid. Write your Name, Class, and Index Number 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 in this booklet. A copy of the Periodic Table is printed on page 19. The use of an approved scientific calculator is expected, where appropriate. Paper 1 40 This document consists of 19 printed pages, and 1 blank page. © HYSS 2024 No part of this document may be reproduced in any form or transmitted in any form or by any means without the prior permission of Hua Yi Secondary School. Setter: Chiang Wai Kit

2 2024_4-G3_ PRELIMS_ CHEMISTRY _PAPER 1 1 A student uses the apparatus shown to measure the volume of oxygen gas produced when different masses of manganese( IV) oxide are added to 50.5 cm 3 of aqueous hydrogen peroxide. What other apparatus are needed? A mass balance and pipette B mass balance and measuring cylinder C measuring cylinder and stop watch D pipette and stopwatch 2 Ammonia gas is produced in a chemical reaction. 3 4 Which of the following methods can be used to collect a dry sample of the gas? A 3 only B 4 only C 1 and 3 D 1, 2 and 3 gas gas concentrated sulfuric acid calcium oxide gas gas concentrated sulfuric acid 1 2 stopper manganese (IV) oxide gas syringe 50.5 cm3 aqueous hydrogen peroxide

3 2024_4-G3_ PRELIMS_ CHEMISTRY _PAPER 1 3 A student accidentally mixed 50 cm3 of water with 50 cm3 of oil. Which method would allow him to obtain 25 cm3 of the oil most easily? A evaporation B filtration C fractional distillation D using a separating funnel 4 The diagram shows the chromatograms of an ink sample P using two different solvents. X is an aqueous solution of a salt of a Group 1 element. Y is an aqeuous solution of a salt of a transition element. Which row correctly describes X and Y? larger Rf value requires a locating agent A X X B X Y C Y X D Y Y solvent front origin

4 2024_4-G3_ PRELIMS_ CHEMISTRY _PAPER 1 5 A sample of solid X is heated until it is completely melted. The graph shows how its temperature varies with time as molten X is cooled. Which of the following statements are true about the particles in X? 1 The arrangement is more orderly at stage RS than at stage PQ. 2 The forces of attraction are stronger at stage P than at stage S. 3 Their total energy content at stage QR is lower than at stage RS. 4 They are closer to each other at stage RS than at stage PQ. A 1 and 2 are correct B 1 and 4 are correct C 2 and 3 are correct D 2 and 4 are correct 6 The table shows some information about particles P, Q, R and T. particle proton number nucleon number number of electrons P 11 23 10 Q 11 23 11 R 17 35 17 T 17 37 18 Which of the following are true about P, Q, R and T? 1 P and Q are particles of the same element. 2 P is a positive ion of atom Q. 3 Q reacts with R to form an ionic compound. 4 T is a noble gas. A 1 and 3 only B 2 and 3 only C 1, 2 and 3 only D 1, 2, 3 and 4 time/ min temperature/ oC P Q R S

5 2024_4-G3_ PRELIMS_ CHEMISTRY _PAPER 1 7 The diagram shown is set up using different gases placed in different beakers. Which gases, when placed in beakers P and Q respectively, will cause the water level at R to fall initially? P Q A carbon dioxide nitrogen B argon nitrogen C nitrogen carbon dioxide D nitrogen hydrogen 8 The diagram below shows the structure of a covalent compound containing the element hydrogen and three other unknown elements, X, Y and Z. How many valence electrons do not take part in the bonding for elements, X, Y and Z? X Y Z A 0 4 2 B 0 6 6 C 4 5 1 D 4 6 5 P Q R water

6 2024_4-G3_ PRELIMS_ CHEMISTRY _PAPER 1 9 An unknown metal M and its compounds are found to be conductors of electricity in different physical states. Which particles are responsible for the electrical conductivity of M (s), MO (l) and MCl2 (aq) in the corresponding states? M (s) MO (l) MCl2 (aq) A cations electrons electrons B cations and anions electrons cations C electrons cations cations and anions D electrons cations and anions cations and anions 10 The table below shows some information about four substances labelled P to S. substance appearance change on heating P colourless liquid boils away, leaving a white residue Q colourless gas burns in oxygen to form water and carbon dioxide only R yellow solid splits up by electricity to form a metal and a gas S white solid burns in air to form an oxide as the only product Which of these substances P, Q, R and S are compounds? A Q and R only B P and Q only C R and S only D Q, R and S only 11 Silicon dioxide, SiO2, has a structure similar to diamond. Boron nitride, BN, has a structure similar to graphite. Bronze is an alloy of copper and tin. Which statements about SiO2, BN and bronze are correct? 1 All are bonded covalently. 2 All except silicon dioxide conduct electricity when solid. 3 All have high melting points. A 1 and 2 only B 1 and 3 only C 2 and 3 only D 1, 2 and 3

7 2024_4-G3_ PRELIMS_ CHEMISTRY _PAPER 1 12 On adding 60 g of impure limestone, CaCO 3 (Mr = 100), to excess sulfuric acid, 10 dm 3 of CO2 was evolved at room temperature and pressure. What is the purity of the limestone? A 16.6% B 25.0% C 34.7% D 69.4% 13 The amount of chlorine in a pesticide may be determined by precipitation of the chlorine in silver chloride. Given 3.50 g of pesticide reacts to produce 0.318 g of silver chloride, what is the percentage by mass of chlorine in the pesticide? A 1.80% B 1.96% C 2.25% D 3.60% 14 Melamine, a plastic, has the following composition by mass. C: 28.6%, H:4.8%, N: 66.6% If its relative molecular mass is 126, what is its molecular formula? A CHN B CH2N2 C C2H4N6 D C3H6N6 15 What is the volume of hydrogen produced at room temperature and pressure when 4.6 g of sodium is reacted with excess water? [1 mol of gas occupies 24 dm3 at room temperature and pressure.] 2Na (s) + 2H2O (l) → 2NaOH (aq) + H2 (g) A 1.2 dm3 B 2.4 dm3 C 4.8 dm3 D 12 dm3

8 2024_4-G3_ PRELIMS_ CHEMISTRY _PAPER 1 16 The diagram shows an experiment with aqueous ammonium chloride. A gas, Y, is produced and the litmus paper changes colour. What is solution X and gas Y? solution X gas Y A aqueous sodium hydroxide ammonia B aqueous sodium hydroxide hydrogen chloride C dilute sulfuric acid ammonia D dilute sulfuric acid hydrogen chloride 17 Which of the following elements form oxides which dissolve in water to form alkaline solutions? 1 calcium 2 copper 3 sodium 4 sulfur A 1 and 3 only B 1 and 4 only C 2 and 3 only D 1, 2 and 3 only