2022 BtySS Chem Prelims P1

BEATTY SECONDARY SCHOOL PRELIMINARY EXAMINATION 2022 SECONDARY FOUR EXPRESS CANDIDATE NAME CLASS REGISTER NUMBER CHEMISTRY 6092/01 Paper 1 Multiple Choice 31 August 2022 Setter: Mr Yeo Chee Keong 1 hour Additional Materials: Multiple Choice Answer Sheet READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, glue or correction fluid. Write your name, class and register number on the Multiple Choice Answer Sheet 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 document consists of 15 printed pages and 1 blank page. [Turn over ��

2 1 Shermen investigates the change in mass during the combustion of magnesium . The diagrams show three set-ups for this investigation. Which set-up(s) is/are suitable for this investigation? A 3 only B 1 and 3 only C 2 and 3 only D 1, 2 and 3 only 2 The table shows the observations made when different reagents are added to an aqueous solution of Z. reagents added observations aqueous sodium hydroxide green-white precipitate; green precipitate only in excess sodium hydroxide dilute nitric acid followed by aqueous silver nitrate yellow precipitate dilute nitric acid followed by aqueous barium nitrate no visible reaction What are the ions present in solution Z? A Al3+, Fe2+, I− B Al3+, Fe3+, SO42− C Pb2+, Fe2+, I− D Pb2+, Fe3+, Cl− 3 A mixture of colourless amino acids is separated using chromatography. The solvent used is propanol and the chromatogram is sprayed with a locating agent. Which row describes the purpose of the propanol and the locating agent? purpose of propanol purpose of locating agent A to make the individual amino acids visible to prevent the amino acids moving any further B to move the amino acids up the chromatography paper to make the individual amino acids visible C to move the amino acids up the chromatography paper to prevent the amino acids moving any further D to prevent the amino acids moving too far up the paper to make the individual amino acids visible ��

3 4 How many underlined substance(s) can be obtained by fractional distillation of the mixture? • hydrogen from liquefied air • propene from bitumen • ethanol from water and ethanol mixture • ethyl ethanoate from ethanol and ethanoic acid A 1 B 2 C 3 D 4 5 Silver dichromate is a re