2022 BBSS Chem Prelims P1

This document consists of 16 printed pages. 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 16. The use of an approved scientific calculator is expected, where appropriate. Name: ………………………………………………… Index no: ………... Class: ……..…. Bukit Batok Secondary School PRELIMINARY EXAMINATIONS 2022 SECONDARY 4 EXPRESS CHEMISTRY Paper 1 Multiple Choice 6092/01 24 Aug 2022 1105–1205 1 hour Additional Materials: Multiple Choice Answer Sheet ��

BBSS/PRELIMS/2022/Sec4E/Chem/6092/1 Applying past knowledge to new situations 2 1 An impure sample of X melts at around 90°C. What is most likely to be the melting point of pure X? A below 80°C B between 85°C and 90°C C between 90°C and 95°C D cannot be determined 2 A student is given a mixture of oil, sand and copper(II) sulfate solution and is required to produce from the mixture, separate samples of oil, sand and copper(II) sulfate. The student is supplied with filtration apparatus(F), a separating funnel(S) and an evaporating dish(E). Which is the correct order of the apparatus used to separate the mixture? A E, F, then S B F, E, then S C F, S, then E D S, F, then E 3 Which statements about kinetic particle theory are incorrect? 1. When a solid is heated, its particles melt. 2. All particles move at a constant speed. 3. Ethene particles move faster than carbon monoxide. A 1 and 2 only B 1 and 3 only C 2 and 3 only D 1, 2 and 3 4 Statements A to D refer to an imaginary element discovered in a meteoroid. Which statement most strongly suggests that the element is a non-metal? A It forms an acidic oxide. B It is soluble in water. C It is a conductor of electricity. D It reacts vigorously with chlorine. ��

BBSS/PRELIMS/2022/Sec4E/Chem/6092/1 Applying past knowledge to new situations 3 5 Two particles have the same number of protons and neutrons but different number of electrons. What can be inferred about the two particles? A They are an atom and an ion of different elements. B They are an atom and an ion of the same element. C They are an atom and an isotope of different elements. D They are an atom and an isotope of the same element. 6 Elements D, E and G are atoms with proton numbers 3, 8 and 17 respectively. What are the formulae of their hydrides formed? D E G A DH