2022 CVSS Chem Prelims P1

康 柏 中 学 COMPASSVALE SECONDARY SCHOOL PRELIMINARY EXAMINATION 2022 CHEMISTRY 6092/01 Paper 1 Multiple Choice Secondary Four Express Name: ________________________ Duration: 1 h Index No: ________ Date: 31 August 2022 Class: _________ Marks: _______ /40 READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, glue or correction fluid. Write your name, index number and class 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 15. The use of an approved scientific calculator is expected, where appropriate. ____________________________________________________________________________________ This question paper consists of 15 printed pages including this page. Setter: Miss Zhuang ���

2 1 The concentration of aqueous sodium carbonate can be found through an experiment involving a reaction with nitric acid of known concentration. Which apparatus are needed for the experiment? A burette, measuring cylinder, gas syringe B burette, pipette, conical flask C burette, pipette, stopwatch D electronic balance, measuring cylinder, gas syringe 2 Gas Y is a water-soluble, acidic gas which is less dense than air. Which method is used to collect a dry sample of gas Y? A B C D Y dry Y water dry Y calcium oxide Y dry Y Y calcium oxide concentrated sulfuric acid dry Y Y ���

3 3 Ethylamine, CH3CH2NH2 (Mr = 45), reacts with hydrogen chloride gas, HCl (Mr = 36.5) to form a white solid, ethylammonium chloride. In an experiment, the following apparatus is set up. Where will the white solid form? A B C D 4 Which statement about kinetic particle theory is correct? A Energy is taken in when a liquid changes into solid state. B Iodine particles are further apart in vapour state than in solid state. C Particles have stronger attractive forces in gaseous state than in liquid state. D When water boils, its particles lose kinetic energy. 5 When two elements react together, a compound is formed. Which statement is correct? A Equal masses of the elements must be used. B The compound formed can be easily separated into its elements. C The compound formed will have a fixed melting point. D The compound shows similar chemical properties to its constituent elements. cotton wool soaked with concentrated CH3CH2NH2 solut