Copy of ACSBR 6092 Sec 4 Prelims 2024_P2

Name Class Index Number Anglo-Chinese School (Barker Road) PRELIMINARY EXAMINATION 2024 SECONDARY FOUR EXPRESS CHEMISTRY 6092/2 TIME: 1 HOUR 45 MINUTES INSTRUCTIONS TO CANDIDATES: Do not open this booklet until you are told to do so. Write in dark blue or black pen. You may use an HB pencil for any diagrams or graphs. Sections A Answer all questions. Write your answers in the spaces provided. Sections B Answer one question. Write your answers in the spaces provided. The number of marks is given in brackets [ ] at the end of each question or part question. The use of an approved scientific calculator is expected, where appropriate. A copy of the Periodic Table is printed on the last page. FOR EXAMINER’S USE ONLY Section A / 70 Section B / 10 Total Score / 80

Anglo-Chinese School (Barker Road) Preliminary Examination 2024 Secondary 4 Express Chemistry 6092/2 2 This paper consists of 23 printed pages including the cover page and a blank page. Section A (70 marks) Answer all questions. A1 The formulae of some ions are given in the following list. Ca2+ Cl− Li+ Na+ O2− (a) Choose ions from the list to answer the questions. You may use each ion once, more than once, or not at all. (i) Which ion has only two electrons? ……….……………………………………………………………………………………... [1] (ii) Which ions have the same arrangement of electrons as argon? ……….……………………………………………………………………………………... [1] (iii) Which two ions bond to form a compound which has the highest melting point? ……….……………………………………………………………………………………... [1] (b) What do you observe when aqueous bromine is added to aqueous Cl− ions? Explain your reasoning. …...……….……………………………………………………………………………………….. …...……….……………………………………………………………………………………….. …...……….……………………………………………………………………………………….. …...……….……………………………………………………………………………………….. [2] [Total: 5]

Anglo-Chinese School (Barker Road) Preliminary Examination 2024 Secondary 4 Express Chemistry 6092/2 3 A2 The structures of ethanoic acid and ethanoyl chloride are shown below. ethanoic acid ethanoyl chloride Both compounds react with methanol to make the same ester. (a) Name and draw the full structural formula of the ester. name of ester: ………………………………………………………………………………….. [2] (b) Complete Table 2.1 to show the formula of the other product of each reaction. Table 2.1 formula product formed from the reaction with ethanoic acid product formed from the reaction with ethanoyl chloride [2] [Total: 4]

Anglo-Chinese School (Barker Road) Preliminary Examination 2024 Secondary 4 Express Chemistry 6092/2 4 A3 Hydrogen peroxide, H