2023 NYGH Chem Prelims P1

Class Centre/Index Number Name Preliminary Examination 2023 Secondary 4 CHEMISTRY Paper 1 Multiple Choice 6092/01 1 hour Friday 25 August 1200 – 1300 Additional materials: Multiple Choice Answer Sheet READ THESE INSTRUCTIONS FIRST Write in soft pencil. Do not use staples, paper clips, glue, correction fluid or tape. Write your name, register number and class in the spaces at the top of this page and 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 document consists of 14 printed pages and 2 blank page. Setter(s): KO NANYANG GIRLS' HIGH SCHOOL [Turn over

2 1 Which of the following shows the states of matter before and after the sublimation of iodine? before after A B C D 2 The diagram below shows a descending chromatogram of a sample containing substance S. The solvent tank is at the top of the set up. Which measurements are used to find the Rf value of S? A 1 and 2 B 1 and 4 C 2 and 3 D 3 and 4 S sample solvent tank 1 2 3 4

3 [Turn over 3 A student wants to measure the time taken for 1.5 g of zinc powder to dissolve in 50 cm3 of dilute sulfuric acid. Which apparatus is essential to complete the experiment? 1 stopwatch 2 measuring cylinder 3 gas syringe 4 balance A 1, 2 and 4 B 1 and 2 only C 1 and 4 only D 2, 3 and 4 4 Which row identifies a chemical change and a physical change? chemical change physical change A boiling ethanol burning ethanol B burning ethanol evaporating ethanol C dissolving ethanol in water burning ethanol D evaporating ethanol dissolving ethanol in water 5 X3- contains 24 particles. 17 of them are charged particles. Which statement about the ion is correct? A It contains 7 neutrons and 7 electrons. B It contains 7 nucleons and 10 electrons. C It contains 7 protons and 10 electrons. D It contains 10 protons and 7 electrons. 6 Which of the following contains both covalent and ionic bonds? A sodium methanoate B methyl ethanoate C lithium chloride D calcium nitride

4 7 The following shows structures of three macromolecules T, U and V. Identify T, U and V. T U V A diamond, C silicon carbide, SiC graphite, C B graphite, C diamond, C silicon carbide, SiC C silicon carbide, SiC s